Tag Archives: perspective

John Cena Says Agency Told Him to Reject ‘Barbie’ Cameo as It ‘May Take You Out’ of Future Lead Roles: Their Perspective Was ‘This Is Beneath You’ – Variety

  1. John Cena Says Agency Told Him to Reject ‘Barbie’ Cameo as It ‘May Take You Out’ of Future Lead Roles: Their Perspective Was ‘This Is Beneath You’ Variety
  2. John Cena’s Agency Tried to Talk Him Out of Role in ‘Barbie,’ But Actor Says “I’m Not a Commodity” Hollywood Reporter
  3. John Cena Says His Agency Told Him to Not Do ‘Barbie’ Cameo Because ‘This Is Beneath You’ PEOPLE
  4. John Cena recalls going against his agency for Barbie cameo Geo News
  5. John Cena says agency advised him against Barbie role Entertainment Weekly News

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Wander Franco investigation: Updates, background and some perspective – Tampa Bay Times

  1. Wander Franco investigation: Updates, background and some perspective Tampa Bay Times
  2. Rays’ Wander Franco accused of improper relationship with second underage girl New York Post
  3. Wander Franco ‘faces allegations of improper relationships with TWO teenage girls after a 17-year-old filed a complaint about Rays star in July,’ claims Dominican media reports amid investigation into new allegations Daily Mail
  4. Wander Franco rumors, Michael Lorenzen’s rare feat & the AL West race heats up Yahoo Sports
  5. Rays brass confident Wander Franco saga will not be a distraction New York Post
  6. View Full Coverage on Google News

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U.S. Women bring ‘fun’ and ‘brave’ perspective in 12-0 elimination loss to Wrexham in The Soccer Tournament – CBS Sports

  1. U.S. Women bring ‘fun’ and ‘brave’ perspective in 12-0 elimination loss to Wrexham in The Soccer Tournament CBS Sports
  2. U.S. Women’s Soccer Team Thrashed By Wrexham Men’s Team Made Up Of Older Players OutKick
  3. The Soccer Tournament EXTENDED HIGHLIGHTS: Conrad & Beasley United 4-3 Wrexham | NBC Sports NBC Sports
  4. Wrexham dumped out of The Soccer Tournament in the round of 16 as owners Ryan Reynolds & Rob McElhenney miss out on $1 million prize fund Goal.com
  5. People think the US Women’s first team lost 12-0 to Wrexham – they didn’t indy100
  6. View Full Coverage on Google News

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Engineering Values Handbook – Widen Your Perspective > News

“In designing our culture, we start from something like these baseline assumptions for Bungie:
  1. Everyone wants to be kind to each other and see each other be happy.
  2. Everyone wants Bungie to be successful and to become a better and better place to work.
  3. We want people to feel comfortable being goofy, authentic, and unguarded while at work. We want people to feel that they can bring their whole selves to work and express themselves freely, while feeling psychological safety.

By default, number three opens an incredibly wide space of acceptable behavior, while the combination of one and two gives us some safety buffer when something in three inadvertently offends (for any number of reasons, not limited to ID&E-related scenarios).

However, we don’t rely on that safety buffer for everything—we’re not building a culture where you can say anything you want and everyone has to tolerate it. This is explicitly unlike the broader US legal system (guaranteed free speech in public spaces, etc.) Bungie’s explicit intent is to pursue shared goals with high cohesion and trust, so we want to be a tighter-knit and less-combative group than the country at large, so we design and evolve our culture to support that goal. So, we go back to that wide open space of personal expression and we add some guardrails to reduce the potential for conflict and hopefully increase overall psychological safety. For example:

  • At Bungie it’s not OK to be unwelcoming in ways that are widely recognized as such in US culture.
    • For example, you’re expected to know that it’s not OK to use any racist slur.
  • At Bungie it’s not OK to be unwelcoming to people in ways that we know matter to them, even in ways that seem more accepted by broader US culture.
    • If someone at Bungie tells us “I personally find this unwelcoming,” we take that incredibly seriously.
    • This is closely related to the Platinum Rule: we treat others as they would like to be treated, rather than as we would like to be treated.
  • This isn’t only about traditional ID&E and URG scenarios, it’s also about following patterns that support a collaborative culture with high psychological safety—a culture that is deeply welcoming to human beings and their talents, and where it feels safe to be vulnerable and to make mistakes. Here are some examples of constraints we place on naive free expression to pursue that goal:
    • It’s not OK to tear down the morale and alignment of the people around you with cynicism. There’s lots of subtlety in the line between cynicism and candid criticism, which we do want!
    • Candid criticism is encouraged, even in groups, as long as it’s straightforward, respectful, constructive, and doesn’t ascribe evil motives or incompetence to others. If criticizing someone’s work helps make it better, that’s wonderful, but remember that you want them to be happy. Make sure that your style of criticism reflects that intention. Of course, it’s possible to take gentleness of criticism too far here—we don’t want to be a culture where we’re all talking in deeply-couched euphemisms about how the emperor might be a tad underdressed for the weather. You’ll want to tune your bar as you work with people—the typical loop is to try what you think is a friendly critique style for the situation, and then ask for feedback afterwards! Sometimes the person will say, “Yeah, that hurt my feelings a bit, I wish you’d done X,” and sometimes they’ll say, “You spent way more time on disclaimers than you needed to, you can be more direct!”
    • If you think that a leader’s decision is wrong, and you spread cynicism and FUD about that among your peers instead of escalating it to that leader in a professional way, that’s not OK.
    • If you catch someone in a mistake, and you call them out on it in a hurtful way, that’s not OK—we don’t want people to fear that negative emotional experiences will be the result of any mistakes, because that results in (a) excessive caution and (b) hiding mistakes rather than learning from them.
    • Demagogic point-scoring in groups is not OK (leveling a rhetorical attack that sounds compelling but is actually oversimplified or deceptive).
    • In virtually all cases, punching down is worse than punching up in these areas—there’s more of an onus on leaders to consistently create psychological safety because of their relative power and security. These guidelines do still apply across any pair of people in the company though—it would be much worse for the CEO to personally insult an associate engineer than vice versa, but neither is OK.
    • There are many more examples like this across our Values Handbook.

With those kinds of guardrails constraining the space of acceptable personal expression, our initial wide space of tolerance-of-expression is now a good bit smaller, but we believe that this makes our culture stronger, especially for the purpose of combining our strengths to make great games!”
     Excerpt from the Tone and Inclusivity Guidelines for Bungie Engineering & Test

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Video Puts into Perspective How Powerful the James Webb Telescope Is

Last week, NASA shared a photo captured by the James Webb Space Telescope’s guidance camera that, while imperfect, is the deepest image ever captured of the universe so far.

While it is one thing to state that a photo is the farthest ever captured of the universe, it can be difficult to understand just how monumental that achievement is without some context. Ethan Gone, a self-described amateur astrophotographer who goes by the name k2qogir on Youtube, puts the photo in a more easily digestible perspective that truly showcases the incredible distance that James Webb is able to image.

In order to see the area of the sky that James Webb captured, Gone took a six-hour exposure of the same area and compared the results.

“The recent James Webb Space Telescope(JWST) guide camera’s test image looks really similar to Hubble’s deep fields, which are my favorite. I decided to take a long exposure to the same target to see what my telescope can see and compare it to JWST’s image. I found one really faint galaxy 26 to 32 million light-years away, and a cute planetary nebula called Abell 39,” Gone explains.

From his perspective, the rest of the area around that region was just empty space.

“Match my image with the JWST’s color and zoom in to the same region, [and] my telescope can only offer a handful of faint stars,” he says.

By comparison, James Webb’s infrared telescope revealed what appears to be thousands of galaxies and stars in this small region of the night sky.

To better understand how impressive Webb’s view of this region of space is, Gone shows that the area it imaged is approximately the size of the Mare Crisium on the Moon, for those looking into the sky from a perspective on Earth.

In short, what Webb imaged with its guidance camera is just one astronomically tiny portion of the sky that looks nearly empty to those on Earth, yet through not even its main camera it was able to see a huge number of stars and galaxies. It showcases the sheer vastness of space and how much more humans can understand about the universe thanks to the exceptional power of the new observatory.

NASA is set to release the first full-color photos captured by the James Webb Space Telescope this week. The first will be released later today by President Joe Biden at 5:00 PM ET, with the other four to be released on July 12 starting at 10:40 AM EDT.



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NASA delivers trippy Mars rover selfie with a dizzying perspective

Curiosity’s 360-degree selfie is made up of 81 images taken in November 2021.


NASA/JPL-Caltech/MSSS

This story is part of Welcome to Mars, our series exploring the red planet.

It’s time for a Mars-rover love-fest. NASA’s Curiosity has blessed us with a new selfie, and it’s as much about the red planet landscape as it is about the rover. 

The image, which NASA shared this week, shows the rover in the center with a dizzying array of rocks all around it. The 360-degree selfie is made from 81 images snapped on Nov. 20 by the Mars Hand Lens Imager on the end of Curiosity’s robotic arm. 

The mosaic approach gives us an unusual perspective, as if the ground is rippling around the rover. I imagine if I visited Mars, held my arms out and spun around really fast in one spot, it would look a lot like this.  

Curiosity is exploring the Gale Crater on a mission to understand if Mars might have once been habitable for microbial life. There are some notable landmarks in the selfie. The rock structure behind the rover is called the Greenheugh Pediment. A hill on the right is named Rafael Navarro Mountain for Rafael Navarro-Gonzalez, a Curiosity mission astrobiologist who died earlier this year.

Another important spot is a U-shaped opening behind and to the left of the rover. Curiosity will be heading that way as it continues its explorations.

Meanwhile, Curiosity’s sibling rover Perseverance is collecting rock samples in a different crater and China’s Zhurong rover remains active, giving humanity a trio of wheeled vehicles that are sending back geologic and atmospheric data. And beautiful selfies to feed our sense of wonder.

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Is shoplifting forcing Walgreens to cut back in S.F.? Data on the closing stores puts the claim into perspective

Data released by the San Francisco Police Department does not support the explanation announced by Walgreens that it is closing five stores because of organized, rampant retail theft.

One of the stores set to close, on Ocean Avenue, had only seven reported shoplifting incidents this year and a total of 23 since 2018, the data showed. While not all shoplifting incidents are reported to police, the five stores slated to close had fewer than two recorded shoplifting incidents a month on average since 2018.

The announcement put Walgreens at the center of one of the city’s most acrimonious debates. What amounted to the closure of a small handful of chain drugstores in the city drew national media attention, fueled by an increasingly bitter fight over how San Francisco polices and prosecutes crime.

“We’ve been sounding the alarm for a while that this issue is not getting better,” said Rachel Michelin, president and CEO of the California Retailers Association, which represents the point of view of merchants.

But the timing of Walgreens’ decision led observers to wonder whether a $140 billion company was using an unsubstantiated narrative of unchecked shoplifting to obscure other possible factors in its decision.

“They are saying (shoplifting is) the primary reason, but I also think when a place is not generating revenue, and when they’re saturated — S.F. has a lot of Walgreens locations all over the city — so I do think that there are other factors that come into play,” Mayor London Breed told reporters last week.

A Walgreens spokesperson declined Friday to answer specific questions about the store closings and whether other factors — such as competition from online retailers, stagnating foot traffic because of the pandemic and originally opening too many stores in San Francisco — played into the decision.

A Chronicle analysis of city maps found 53 Walgreens in San Francisco, compared with 22 CVS stores. Those numbers include locations that are solely pharmacies, inside medical buildings or other retailers.

Spokesperson Phil Caruso said he was also unable to share figures about the stores’ revenue. He instead referred back to a previous statement from the company, saying that over the past few months, retail theft in San Francisco had escalated to “five times our chain average” at its stores and that as a result, the corporation had ramped up investments in security for San Francisco locations “to 46 times our chain average.”

Four years ago, Walgreens told shareholders it planned to close 600 stores nationwide. It wound up closing 769. In 2019, the Illinois company said in a U.S. Security and Exchange Commission filing that it would shutter 200 stores, or fewer than 3% of its 10,000 locations in the U.S. — one of several cost-saving measures projected to save $1.5 billion in annual expenses by 2022, according to the filings.

San Francisco Supervisor Dean Preston seemed exasperated and skeptical of Walgreens’ rationale. One of the five ill-fated stores, at 300 Gough St., sits in his district.

“Walgreens is abandoning the community. We do not know exactly why,” he said The Chronicle. Preston tweeted that his office is trying to get “further clarity” on the impetus for the closures, and assess “whether there is a path” to keep the Gough Street store open.

“Two things are true: Walgreens has experienced retail theft, and Walgreens has long planned to close stores. We do not know which factor or factors led to the decision to close 300 Gough and other San Francisco stores,” Preston said.

One Stanford economist observed that in San Francisco, the customer base is dwindling given the decline in population downtown after the pandemic and the number of people working remotely.

“Since working from home is here to stay, city center retail is going to see lower demand in the long run,” Stanford University economics Professor Nicholas Bloom wrote in an email, citing a study he published in May that shows 15% of residents left the city center during the pandemic and have not returned.

“So this is going to be one of many such store closures,” Bloom speculated.

“While Walgreens may have publicly blamed this on higher thefts, another factor is there are simply less people in the city center, spending less money,” he said.

Police records show that the fives stores slated to close experienced 319 shoplifting incidents since the beginning of 2018. The numbers appeared to swing wildly: The Walgreens at 4645 Mission St., which had the most shoplifting reports — 37 — in 2020, had the lowest number — 3 — as of Oct. 13 this year.

Shoplifting in San Francisco became a viral story after the wide circulation of a video in June showing a man grabbing items from shelves in a Walgreens at 300 Gough St. and stuffing them into garbage bags. The Gough Street store is among the stores set to close. He rode out of the store on a bicycle while two astonished onlookers — one wearing a security guard’s uniform — recorded the incident on their cell phones.

By announcing it was closing stores because of shoplifting, Walgreens inserted itself into one of the most divisive political battles in the city, one that contributed to a broader debate about crime and law enforcement. Proponents of the recall of District Attorney Chesa Boudin, for example, point to shoplifting as one example of how life in the city has deteriorated on his watch.

In an opinion piece for the San Diego Union-Tribune, California Republican Party Chair Jessica Millan Patterson pointed to the five Walgreens closures as evidence that “Democratic policies have created a crime spike.”

Retailers have been unhappy since the state in 2014 passed Proposition 47, which classifies shoplifting as a misdemeanor unless the stolen items were valued at more than $950. They have unsuccessfully sought to have the law overturned. The California Retailers Association lobbied against the law’s passage. Criminal reform advocates argue that minor shoplifting arrests disproportionately affect underrepresented communities and contribute to unfairly high incarceration rates.

Michelin contended that shoplifting is a heavy burden for chain stores and other merchants. Hiring security guards and installing locked cases is expensive, she said. She expected to see other retailers shut down in the future.

Some city officials shared that concern, which is why they began a multipronged effort by adding more dedicated police investigators and upgrading the city’s online reporting system.

San Francisco does struggle with unusually high property crime rates compared with many other cities. According to a 2019 report by the Public Policy Institute of California, San Francisco had the highest rate of property crime per capita of any city in the state. That’s probably at least in part because of the city’s high levels of economic inequality and population density, criminal justice researcher Magnus Lofstrom previously told The Chronicle.

Lost somewhere in the conversation are customers, who have grown impatient with the locked shelves and other security measures, and the specter of fewer stores next month.

“It’s all very sad,” Haight resident Qussay Ammar said, standing outside the Gough Street Walgreens on Thursday afternoon. Workers had already packed up the merchandise in the cosmetics aisle, now lined with boxes and empty shelves. Most other products, from air freshener, to vitamins, to anti-bacterial wipes, were behind plexiglass.

Another shopper, Keira Wiele, said she’d witnessed “a lot of retail theft at this particular Walgreens,” but that she’s still wary of the company’s messaging.

“Do I think they’re in a position where people are grabbing a couple snacks from the shelves here or there? Yes,” Wiele said.

“Do I think it’s a huge issue? No.”

On Friday, customers at the Ocean Avenue Walgreens stopped to gape at a sign in the front window. It marked Nov. 8 as the last day of business.

San Francisco Chronicle staff writer Susie Neilson contributed to this report.

Rachel Swan, Danielle Echevarria and Shwanika Narayan are San Francisco Chronicle staff writers. Email: rswan@sfchronicle.com,
danielle.echeverria@sfchronicle.com, shwanika.narayan@sfchronicle.com
Twitter: @rachelswan,
@DanielleEchev, @shwanika



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A New Perspective on Earth’s Atmosphere

The SpaceX Starship might be the next rocket to take humans to the moon, but it won’t be the first, and likely not the last.

Starting in the mid-20th century, humanity has explored space faster than ever before. We’ve launched satellites, telescopes, space stations, and spacecrafts, all strapped to rocket-propelled launch vehicles that helped them breach our atmosphere.

This infographic from designer Tyler Skarbek stacks up the many different rockets of the world side-by-side, showing which country designed them, what years they were used, and what they (could) accomplish.

How Do The World’s Rockets Stack Up?

Before they were used for space travel, rockets were produced and developed to be used as ballistic missiles.

The first rocket to officially reach space—defined by the Fédération Aéronautique Internationale as crossing the Kármán line at 100 kilometers (62 miles) above Earth’s mean sea level—was the German-produced V-2 rocket in 1944.

But after World War II, V-2 production fell into the hands of the U.S., the Soviet Union (USSR), and the UK.

Over the next few decades and the unfolding of the Cold War, what started as a nuclear arms race of superior ballistic missiles turned into the Space Race. Both the U.S. and the USSR tried to be the first to achieve and master spaceflight, driving production of many new and different rockets.

Origin Country Rocket Years Active Payload (Range) Success/Failure
Germany V-2 1942–1952 (Suborbital) 2852/950
U.S. Vanguard 1957–1959 9 kg (LEO) 3/8
USSR Sputnik 1957–1964 1,322 kg (LEO) 6/1
U.S. Juno 1 1958–1958 11 kg (LEO) 3/3
U.S. Juno II 1958–1961 41 kg (LEO) 4/6
USSR Vostok 1958–1991 4,725 kg (LEO) 106/3
U.S. Redstone 1960–1961 1,800 kg (Suborbital) 5/1
U.S. Atlas LV-3B 1960–1963 1,360 kg (LEO) 7/2
U.S. Atlas-Agena 1960–1978 1,000 kg (LEO) 93/16
U.S. Scout 1961–1994 150 kg (LEO) 121/27
USSR Voskhod 1963–1976 5,900 kg (LEO) 281/14
U.S. Titan II 1964–1966 3,100 kg (LEO) 12/0
Europe (ELDO) Europa 1964–1971 360 kg (GTO) 4/7
France Diamant 1965–1975 160 kg (LEO) 9/3
U.S. Atlas E/F 1965–2001 820 kg (LEO) 56/9
USSR Soyuz 1965–Present 7,100 kg (LEO) 1263/44
USSR Proton 1965–Present 23,700 kg (LEO) 375/48
U.S. Saturn 1B 1966–1975 21,000 kg (LEO) 9/0
U.S. Saturn V 1967–1973 48,600 kg (TLI) 13/0
USSR Kosmos-3M 1967–2010 1,500 kg (LEO) 424/20
UK Black Arrow 1969–1971 135 kg (LEO) 2/2
U.S. Titan 23B 1969–1971 3,300 kg (LEO) 32/1
USSR N1 1969–1972 23,500 kg (TLI) 0/4
Japan N-1 1975–1982 1,200 kg (LEO) 6/1
Europe (ESA) Ariane 1 1976–1986 1,400 kg (LEO) 9/2
USSR Tsyklon-3 1977–2009 4,100 kg (LEO) 114/8
U.S. STS 1981–2011 24,400 kg (LEO) 133/2
USSR Zenit 1985–Present 13,740 kg (LEO) 71/13
Japan H-I 1986–1992 3,200 kg (LEO) 9/0
USSR Energia 1987–1988 88,000 kg (LEO) 2/0
Israel Shavit 1988–2016 800 kg (LEO) 8/2
U.S. Titan IV 1989–2005 17,000 kg (LEO) 35/4
U.S. Delta II 1989–2018 6,100 kg (LEO) 155/2
Europe (ESA) Ariane 4 1990–2003 7,600 kg (LEO) 113/3
U.S. Pegasus 1990–Present 443 kg (LEO) 39/5
Russia Rokot 1990–Present 1,950 kg (LEO) 31/3
U.S. Atlas II 1991–2004 6,580 kg (LEO) 63/0
China Long March 2D 1992–Present 3,500 kg (LEO) 44/1
India PSLV 1993–Present 3,800 kg (LEO) 47/3
Japan H-IIA 1994–2018 15,000 kg (LEO) 40/1
Europe (ESA) Ariane 5 1996–Present 10,865 kg (GTO) 104/5
Brazil VLS-1 1997–2003 380 kg (LEO) 0/2
USSR Dnepr-1 1999–2015 4,500 kg (LEO) 21/1
U.S. Atlas III 2000–2005 8,640 kg (LEO) 6/0
Japan M-V 2000–2006 1,800 kg (LEO) 6/1
U.S. Minotaur 1 2000–2013 580 kg (LEO) 11/0
India GSLV MK1 2001–2016 5,000 kg (LEO) 6/5
U.S. Atlas V 400 2002–Present 15,260 kg (LEO) 54/1
U.S. Delta IV Medium 2003–Present 9,420 kg (LEO) 20/0
U.S. Delta IV Heavy 2004–Present 28,790 kg (LEO) 12/1
U.S. Falcon 1 2006–2009 180 kg (LEO) 2/3
China Long March 4C 2006–Present 4,200 kg (LEO) 26/2
U.S. Atlas V 500 2006–Present 18,850 kg (LEO) 27/0
Iran Safir 2008–Present 65 kg (LEO) 4/1
U.S. Minotaur IV 2010–Present 1,735 kg (LEO) 6/0
Europe (ESA) Vega 2012–Present 1,450 kg (SSO) 14/1
U.S. Minotaur V 2013–Present 532 kg (GTO) 1/0
Japan Epsilon 2013–Present 1,500 kg (LEO) 4/0
U.S. Antares 2013–Present 8,000 kg (LEO) 11/1
U.S. Falcon 9 FT 2013–Present 22,800 kg (LEO) 96/0
India GSLV MK3 2014–Present 4,000 kg (GTO) 4/0
Russia Angara 5 2014–Present 13,450 kg (LEO) 3/0
U.S. New Shepard 2015–Present (Suborbital) 14/0
New Zealand Electron 2017–Present 225 kg (SSO) 17/2
U.S. Falcon 9 Heavy 2018–Present 54,400 kg (LEO) 3/0
U.S. Starship 2021–Present 100,000 kg (LEO) 0/0
U.S. SLS 2021–Present 36,740 kg (TLI) 0/0

As the Space Race wound down, the U.S. proved to be the biggest producer of different rockets. The eventual dissolution of the USSR in 1991 transferred production of Soviet rockets to Russia or Ukraine. Then later, both Europe (through the European Space Agency) and Japan ramped up rocket production as well.

More recently, new countries have since joined the race, including China, Iran, and India. Though the above infographic shows many different families of rockets, it doesn’t include all, including China’s Kuaizhou rocket and Iran’s Zuljanah and Qased rockets.

Rocket Range Explained and Continued Space Aspirations

Designing a rocket that can reach far into space while carrying a heavy payload—the objects or entities being carried by a vehicle—is extremely difficult and precise. It’s not called rocket science for nothing.

When rockets are designed, they are are created with one specific range in mind that takes into account the fuel needed to travel and velocity achievable. Alternatively, they have different payload ratings depending on what’s achievable and reliable based on the target range.

  • Suborbital: Reaches outer space, but its trajectory intersects the atmosphere and comes back down. It won’t be able to complete an orbital revolution or reach escape velocity.
  • LEO (Low Earth orbit): Reaches altitude of up to ~2,000 km (1242.74 miles) and orbits the Earth at an orbital period of 128 minutes or less (or 11.25 orbits per day).
  • SSO (Sun-synchronous orbit): Reaches around 600–800 km above Earth in altitude but orbits at an inclination of ~98°, or nearly from pole to pole, in order to keep consistent solar time.
  • GTO (Geosynchronous transfer orbit): Launches into a highly elliptical orbit which gets as close in altitude as LEO and as far away as 35,786 km (22,236 miles) above sea level.
  • TLI (Trans-lunar injection): Launches on a trajectory (or accelerates from Earth orbit) to reach the Moon, an average distance of 384,400 km (238,900 miles) from Earth.

But there are other ranges and orbits in the eyes of potential spacefarers. Mars for example, a lofty target in the eyes of SpaceX and billionaire founder Elon Musk, is between about 54 and 103 million km (34 and 64 million miles) from Earth at its closest approach.

With space exploration becoming more common, and lucrative enough to warrant billion-dollar lawsuits over contract awards, how far will future rockets go?

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Seeing Some Cosmic X-Ray Emitters Might Be a Matter of Perspective

This illustration shows SS 433, a black hole or neutron star, as it pulls material away from its companion star. The stellar material forms a disk around SS 433, and some of the material is ejected into space in the form of two thin jets (pink) traveling in opposite directions away from SS 433. Credit: DESY/Science Communication Lab

Known as ultraluminous X-ray sources, the emitters are easy to spot when viewed straight on, but they might be hidden from view if they point even slightly away from Earth.

It’s hard to miss a flashlight beam pointed straight at you. But that beam viewed from the side appears significantly dimmer. The same holds true for some cosmic objects: Like a flashlight, they radiate primarily in one direction, and they look dramatically different depending on whether the beam points away from Earth (and nearby space telescopes) or straight at it.

New data from

This animation illustrates how SS 433 — which contains a bright light source surrounded by two bowl-shaped structures — tilts back and forth in its orbit. As with a flashlight, the light of SS 433 appears much dimmer when viewed from the side. Credit: NASA/JPL-Caltech

The new study shows that the object known as SS 433, located in the

The cosmic object SS 433 contains a bright source of X-ray light surrounded by two hemispheres of hot gas. SS 433 tilts periodically, causing one X-ray beam to point toward Earth.
Credit: NASA/JPL-Caltech

“It’s been known for a long time that this thing is eating at a phenomenal rate,” said Middleton. “This is what sets ULXs apart from other objects, and it’s likely the root cause of the copious amounts of X-rays we see from them.”

The object in SS 433 has eyes bigger than its stomach: It’s stealing more material than it can consume. Some of the excess material gets blown off the disk and forms two hemispheres on opposite sides of the disk. Within each one is a cone-shaped void that opens up into space. These are the cones that corral the high-energy X-ray light into a beam. Anyone looking straight down one of the cones would see an obvious ULX. Though composed only of gas, the cones are so thick and massive that they act like lead paneling in an X-ray screening room and block X-rays from passing through them out to the side.

Scientists have suspected that some ULXs might be hidden from view for this reason. SS 433 provided a unique chance to test this idea because, like a top, it wobbles on its axis – a process astronomers call precession.

Illustration of the NuSTAR spacecraft, which has a 30-foot (10 meter) mast that separate the optics modules (right) from the detectors in the focal plane (left). This separation is necessary for the method used to detect X-rays. Credit: NASA/JPL-Caltech

Most of the time, both of SS 433’s cones point well away from Earth. But because of the way SS 433 precesses, one cone periodically tilts slightly toward Earth, so scientists can see a little bit of the X-ray light coming out of the top of the cone. In the new study, the scientists looked at how the X-rays seen by NuSTAR change as SS 433 moves. They show that if the cone continued to tilt toward Earth so that scientists could peer straight down it, they would see enough X-ray light to officially call SS 433 a ULX.

Black holes that feed at extreme rates have shaped the history of our universe. Supermassive black holes, which are millions to billions of times the mass of the Sun, can profoundly affect their host galaxy when they feed. Early in the universe’s history, some of these massive black holes may have fed as fast as SS 433, releasing huge amounts of radiation that reshaped local environments. Outflows (like the cones in SS 433) redistributed matter that could eventually form stars and other objects.

But because these quickly consuming behemoths reside in incredibly distant galaxies (the one at the heart of the Milky Way isn’t currently eating much), they remain difficult to study. With SS 433, scientists have found a miniature example of this process, much closer to home and much easier to study, and NuSTAR has provided new insights into the activity occurring there.

“When we launched NuSTAR, I don’t think anyone expected that ULXs would be such a rich area of research for us,” said Fiona Harrison, principal investigator for NuSTAR and a professor of physics at Caltech in Pasadena, California. “But NuSTAR is unique in that it can see almost the whole range of X-ray wavelengths emitted by these objects, and that gives us insight into the extreme processes that must be driving them.”

Reference: “NuSTAR reveals the hidden nature of SS433” by M J Middleton, D J Walton, W Alston, T Dauser, S Eikenberry, Y-F Jiang, A C Fabian, F Fuerst, M Brightman, H Marshall, M Parker, C Pinto, F A Harrison, M Bachetti, D Altamirano, A J Bird, G Perez, J Miller-Jones, P Charles, S Boggs, F Christensen, W Craig, K Forster, B Grefenstette, C Hailey, K Madsen, D Stern and W Zhang, 6 May 2021, Monthly Notices of the Royal Astronomical Society.
DOI: 10.1093/mnras/stab1280

More About the Mission

NuSTAR is a Small Explorer mission led by Caltech and managed by NASA’s Jet Propulsion Laboratory, a division of Caltech, for the agency’s Science Mission Directorate in Washington. NuSTAR was developed in partnership with the Danish Technical University and the Italian Space Agency (ASI). The spacecraft was built by Orbital Sciences Corporation in Dulles, Virginia (now part of Northrop Grumman). NuSTAR’s mission operations center is at the (function(d, s, id){ var js, fjs = d.getElementsByTagName(s)[0]; if (d.getElementById(id)) return; js = d.createElement(s); js.id = id; js.src = "https://connect.facebook.net/en_US/sdk.js#xfbml=1&version=v2.6"; fjs.parentNode.insertBefore(js, fjs); }(document, 'script', 'facebook-jssdk'));

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