Tag Archives: European Space Agency

Russia Wants to Trade 36 Hijacked Satellites for Soyuz Rocket

Russia’s Soyuz rockets were used to launch OneWeb satellites from French Guiana.

The Russian space agency may be willing to return 36 satellites it’s been keeping hostage in Kazakhstan in exchange for parts of its Soyuz rockets that are being held in French Guiana.

According to a report by Russian Space Web, French aerospace company Arianespace might be looking into a deal with Roscosmos to swap components of the Russian Soyuz rocket for 36 OneWeb satellites that have been held at its Kazakhstan launch site since March. Roscosmos’s newly appointed head Yuri Borisov is reportedly open to negotiations with Arianespace, a source told Russian Space Web.

Arianespace and OneWeb did not immediately respond to our request for confirmations of the Russian Space Web report. We’ll update this post should we hear back.

Under the helm of former Roscosmos head Dmitry Rogozin, the space agency severed ties with Europe in retaliation for Western-imposed sanctions against Russia. That included an ongoing deal it had with British company OneWeb to launch its internet satellites to orbit aboard the Soyuz rockets. OneWeb refused to agree to a list of unreasonable demands put forward by Roscosmos in March, prompting Russia to hold on to the company’s 36 satellites and store them indefinitely at its launch facility in Baikonur, Kazakhstan. OneWeb eventually forged new partnerships with SpaceX and India’s space agency to launch its remaining satellites to orbit, but its 36 lonesome satellites remained out of reach.

Roscosmos also halted its cooperation with Europe on Soyuz rocket launches from French Guiana and withdrew 87 employees from the launch site. But with Russian involvement in French Guiana terminated, the Soyuz rocket components were left abandoned, as Anatoly Zak writes at Russian Space Web:

On orders from Roskosmos head Dmitry Rogozin, dozens of Russian specialists were abruptly withdrawn from French Guiana in early March 2022, leaving behind the rocket stages, containers with propellant, support hardware and documentation. The Paris-based Arianespace company, which contracted Roskosmos to provide and support Soyuz launches with European and most non-Russian commercial payloads, took custody of the stored equipment until its expected return to Russia. However, due to the severe breakdown in diplomatic relations and economic activities between Europe and Moscow, the Russian hardware remained in French Guiana for the rest of 2022.

With Russia gone from French Guiana, the European Space Agency is turning to U.S. company SpaceX to launch its upcoming Euclid telescope to orbit instead of launching it on board a Soyuz rocket.

Following Rogozin’s dismissal from his position at Roscosmos, the space agency could be taking a more diplomatic approach to its space partnerships. But it could still take some time. Russian Space Web’s source said some logistical hurdles still need to be addressed, which are causing negotiations to advance at a slow pace. For example, Russian specialists would need to obtain new visas to enter French Guiana and retrieve the rocket parts, a process made more difficult on account of Russia’s severed ties with Europe.

The previous year was tumultuous for both the Russian and European space industry; Russia lost key space partners while Europe scrambled to find ways of reaching orbit without access to Soyuz rockets. Whether or not this will change this year remains to be seen, but an ongoing swap agreement may be a good step for now.

More: Europe Has Few Options to Reach Space After Vega-C Rocket Crash



Read original article here

Vega C Rocket Fails During Second Launch Attempt

The Vega-C rocket lifting off from its launch pad at the Kourou space base, French Guiana, December 21, 2022.
Photo: JM Guillon (AP)

Arianespace’s medium-lift Vega-C rocket failed to reach orbit on its second mission, resulting in the destruction of the two satellites on board.

The rocket, developed by the European Space Agency (ESA), built by Italian company Avio, and operated by Arianespace, took off on Tuesday at 8:47 p.m. ET from the Kourou space base in French Guiana, carrying the Neo 5 and Neo 6 satellites for for Airbus’ Pléiades Neo Earth-imaging constellation.

The rocket’s first stage separated successfully from the second stage, but trouble ensued shortly thereafter. Around two minutes and 27 seconds after liftoff, the rocket’s second stage, called the Zefiro 40, experienced a catastrophic anomaly, Arianespace announced on Twitter.

“Following the nominal ignition of the second stage’s (Zefiro 40) engine around 144 seconds after lift-off, a decrease in the pressure was observed leading to the premature end of the mission,” Arianespace wrote in a statement.

“After this underpressure, we have observed the deviation of the trajectory and very strong anomalies, so unfortunately we can say that the mission is lost,” Stéphane Israël, chief executive of Arianespace, said on the launch webcast, as reported by SpaceNews. Per standard procedures, the rocket was ordered to self-destruct.

The satellites on board were meant to complete Airbus’ six-satellite constellation, providing high-resolution imagery of Earth.

Arianespace and ESA have appointed an independent inquiry commission to analyze the reason for the rocket’s failure and determine what needs to be done before Vega-C can resume flights, according to an Arianespace statement.

Vega-C was originally scheduled to launch on November 24, but the mission was delayed due to faulty equipment in the payload fairing separation system. The launch system hasn’t had the best track record, with the latest incident marking the third time a Vega rocket has suffered a mission failure in the last eight liftoffs, according to the BBC. In November 2020, a Vega rocket failed eight minutes into the mission, the result of human error.

More on this story: Vega Rocket Failure Apparently Caused by Human Error

It’s a disappointing follow-up to Vega-C’s debut this summer. On July 13, Vega-C successfully completed its inaugural flight, delivering the Italian Space Agency’s LARES-2 to orbit as its primary payload. Vega-C is a more powerful successor to the Vega launcher, which was in operation for 10 years. Vega-C is fitted with a more powerful first and second stage, along with an improved re-ignitable upper stage.

Tuesday’s mission marked the first time Vega-C carried a commercial payload, so it is unfortunate that the mission ended in failure. ESA is counting on Vega-C to deliver European payloads to orbit and maintain its presence in the growing space industry by virtue of possessing its own launch vehicle.

ESA is also getting ready to debut Ariane 6, the next-generation launcher to follow Ariane 5. Ariane 6 was originally slated for launch in 2020, but has suffered numerous delays, and is now scheduled to fly in 2023. “With Vega-C and Ariane 6, Europe will have a flexible, independent solution for a fast-changing launch market,” Daniel Neuenschwande, ESA’s director of Space Transportation, said in a statement in June.

Hopefully ESA can recover from the mission failure and get Vega-C back on track.

More: We Can’t Wait for These Futuristic Rockets to Finally Blast Off



Read original article here

Webb telescope observes whirling stars create dust rings

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more.



CNN
 — 

A new image captured by the James Webb Space Telescope shows rings of dust plumes created by the violent interactions between two stars.

The image is part of new research that reveals how intense starlight can push matter around in space by focusing on a double-star system located 5,000 light-years away from Earth in the Cygnus constellation.

The star system, called WR140, includes a Wolf-Rayet star and a blue supergiant star swirling around one another in an orbit that takes eight years to complete. The blue supergiant is an O-type star, one of the most massive star types known. Only some massive stars evolve into a Wolf-Rayet as they approach the end of their life cycle. This stage lasts a few hundred thousand years.

Astronomers have observed the binary star system for two decades using the W.M. Keck Observatory in Hawaii.

Every eight years when the stars come close together, they release dust plumes that stretch thousands of times the distance between Earth and the sun. Researchers observed the plumes to measure how starlight can impact matter for their study published in the journal Nature on Wednesday.

Light can exert a type of momentum called radiation pressure on matter, but it’s difficult to spot in space.

“It’s hard to see starlight causing acceleration because the force fades with distance, and other forces quickly take over,” said first study author Yinuo Han, doctoral student at the University of Cambridge’s Institute of Astronomy in the United Kingdom, in a statement.

“To witness acceleration at the level that it becomes measurable, the material needs to be reasonably close to the star or the source of the radiation pressure needs to be extra strong. WR140 is a binary star whose ferocious radiation field supercharges these effects, placing them within reach of our high-precision data.”

All stars generate their own stellar wind, or streams of gas blown out into space, but massive Wolf-Rayet stars can whip up winds into something more akin to a stellar hurricane. Wolf-Rayet stars in later stages of their life cycle have blown off their hydrogen layer. Hydrogen can’t form dust on its own, but other elements located in a star’s interior, like carbon, can.

Carbon condenses into sooty dust in the rapidly whirling wind, which glows in infrared light that is invisible to the human eye. But telescopes can spot this warm, glowing light.

The team’s observations revealed that the dust plumes form where the stellar winds from both of the giant stars collide, creating a cone-shaped shock front between the stars.

As the stars go through their oval-shaped orbit, the shock front also moves, which causes the smoke-like dust plume to spiral. If the stars had a circular orbit, it would form a pinwheel pattern. Instead, the oval-shaped orbit creates delays in dust production that cause the dust plumes to resemble rings or shells.

The end result resembles an uneven bull’s-eye or something that looks like a spiderweb.

The Webb telescope was able to peer much deeper into the binary star system than ground-based telescopes and observed almost 20 accelerating dust plumes nested inside each other. The journal Nature Astronomy published the results of the Webb observation on Wednesday.

“Like clockwork, this star puffs out sculpted smoke rings every eight years, with all this wonderful physics written then inflated in the wind like a banner for us to read,” said study coauthor Peter Tuthill, a professor at the School of Physics at The University of Sydney, in a statement.

“Eight years later as the binary returns in its orbit, another appears the same as the one before, streaming out into space inside the bubble of the previous one, like a set of giant nested Russian dolls.”

The predictable production of a dust plume every eight years in the star system provided researchers with the perfect target to study the expansion rate of each dust spiral. Rather than expanding a constant speed, they were observed accelerating.

“In one sense, we always knew this must be the reason for the outflow, but I never dreamed we’d be able to see the physics at work like this,” Tuthill said. “When I look at the data now, I see WR140’s plume unfurling like a giant sail made of dust. When it catches the photon wind streaming from the star, like a yacht catching a gust, it makes a sudden leap forward.”

Webb’s sensitivity will allow astronomers to make more observations of Wolf-Rayet stars and their intriguing physics in the future, according to the study authors.

Read original article here

Moment of DART asteroid impact captured by Italian satellite

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more.



CNN
 — 

History was made Monday night when NASA’s Double Asteroid Redirection Test spacecraft successfully slammed into the asteroid Dimorphos.

DART’s camera shared dramatic images of the asteroid’s surface before it crashed.

Now, new images captured by its companion, a cube satellite known as LICIACube, reveal what the impact looked like from another perspective.

The Light Italian CubeSat for Imaging of Asteroids, provided by the Italian Space Agency, is about the size of a briefcase. It deployed from the DART spacecraft on September 11 and traveled behind it to record the event from a safe distance of about 34 miles (55 kilometers).

Three minutes after impact, the CubeSat flew by Dimorphos – which orbits a larger asteroid, Didymos – to capture images and video.

The series of images showcases bright material releasing from the surface of Dimorphos after the collision. Didymos is in the foreground.

“Here are the pictures taken by @LICIACube of the world’s first planetary defense mission. This is exactly where the #NASA #DartMission ended. An incredible emotion, the beginning of new discoveries,” read a tweet from Argotec Space, an Italian company that developed the CubeSat for the Italian Space Agency.

The egg-shaped asteroid’s surface, covered in boulders, looked similar to Bennu and Ryugu, two other asteroids visited by spacecraft in recent years. Scientists suspect that Dimorphos is a rubble pile asteroid made of loosely bound rocks.

The mission team is eager to learn more about the impact crater left behind by DART, which they estimate to be about 33 to 65 feet (10 to 20 meters) in size. There may even be shattered pieces of the spacecraft in the crater.

The intentional collision, which took place about 6.8 million miles (11 million kilometers) away from Earth, was humanity’s first asteroid deflection attempt.

INTERACTIVE: One spacecraft’s journey to test Earth’s planetary defenses

Neither Dimorphos nor Didymospose a threat to Earth. But analysis of how much the DART spacecraft was able to alter Dimorphos’ motion could inform techniques to protect Earth should a space rock ever be heading for impact.

While it will take about two months for observations from ground-based telescopes to determine whether DART was successful in slightly shrinking Dimorphos’ orbit around Didymos, observatories, including the Virtual Telescope Project in Rome, are already sharing their perspective of the collision event.

Astronomers at the Les Makes observatory on the French island of La Reunion in the Indian Ocean also shared a sequence of images that show the asteroid brightening upon impact, as well as a cloud of material that released from its surface afterward. The cloud drifted eastward and dissipated slowly, according to the European Space Agency.

Les Makes is a collaborating station as part of the ESA’s Planetary Defense Office and Near-Earth Object Coordination Center.

A video of observations shared by the observatory condenses about 30 minutes worth of footage into just a few seconds.

“Something like this has never been done before, and we weren’t entirely sure what to expect. It was an emotional moment for us as the footage came in,” said Marco Micheli, astronomer at ESA’s Near-Earth Object Coordination Center, in a statement.

As astronomers around the world settle in to study their observations of the asteroid system after impact, the ESA’s Hera mission is gearing up for a future visit to Didymos and Dimorphos.

Hera will serve as a follow-up mission, launching in 2024.

“The results from DART will prepare us for Hera’s visit to the Didymos binary system to examine the aftermath of this impact a few years from now,” said Ian Carnelli, Hera Mission Manager, in a statement. “Hera will help us understand what happened to Dimorphos, the first celestial body to be measurably moved by humankind.”



Read original article here

Webb telescope shares its first observations of Mars

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more.



CNN
 — 

The James Webb Space Telescope’s main goal is to detect faint light from distant galaxies, but it recently observed one of the brightest objects in the night sky: Mars.

The space observatory captured its first images and data of the red planet on September 5.

Multiple orbiters above Mars, and the land-bound rovers Curiosity and Perseverance, roam the surface, regularly send back insights. Webb’s infrared capabilities contribute another perspective that could reveal details about the Martian surface and atmosphere.

Webb, located a million miles (1.6 million kilometers) from Earth, can spot the sunlit side of Mars that faces the space telescope, which puts the observatory in the perfect position to spy the planet’s seasonal changes, dust storms and weather all at once.

The telescope is so sensitive that astronomers had to make adjustments to prevent the blinding infrared light of Mars from saturating Webb’s detectors. Instead, Webb observed Mars using very short exposures.

The new images depict Mars’ eastern hemisphere in different wavelengths of infrared light. To the left is a reference map of the hemisphere captured by the Mars Global Surveyor mission, which ended in 2006.

The top-right image from Webb shows reflected sunlight on the Martian surface, showcasing Martian features like the Huygens Crater, dark volcanic rock and the Hellas Planitia, a massive impact crater on the red planet that stretches for more than 1,200 miles (2,000 kilometers).

The lower-right image shows the thermal emission of Mars, or the light emitted by the planet as it loses heat. The brightest areas indicate the warmest spots. Additionally, astronomers spotted something else in the thermal emission image.

When this thermal light passes through the Martian atmosphere, some of it is absorbed by carbon dioxide molecules. This phenomenon has caused the Hellas Planitia to appear darker.

“This is actually not a thermal effect at Hellas,” said Geronimo Villanueva, a planetary scientist at NASA’s Goddard Space Flight Center, in Greenbelt, Maryland, in a statement.

“The Hellas Basin is a lower altitude, and thus experiences higher air pressure,” said Villanueva, who is also the principal investigator of Mars and Ocean Worlds studies for Webb. “That higher pressure leads to a suppression of the thermal emission at this particular wavelength range due to an effect called pressure broadening. It will be very interesting to tease apart these competing effects in these data.”

With Webb’s powerful capabilities, Villanueva and his team also captured the first near-infrared spectrum of Mars.

The spectrum indicates more subtle differences in brightness across the planet, which could highlight aspects of the Martian surface and atmosphere. An initial analysis has revealed information about icy clouds, dust, rock types on the surface and the composition of the atmosphere contained in the spectrum. There are also signatures of water, carbon dioxide and carbon monoxide.

The NASA research team will share more about Webb’s observations of Mars in a study that will be submitted for peer review and publication in the future. And the Mars team is looking forward to using Webb’s capabilities to pick out the differences between regions on the red planet and search for gases like methane and hydrogen chloride in the atmosphere.

Read original article here

Webb telescope captures ‘Phantom Galaxy’ in dazzling detail

Issued on:

The James Webb space telescope has revealed dazzling new detail of a slice of the cosmos 32 million light-years away in a new picture released by NASA and the European Space Agency (ESA). 

The infrared technology of the telescope, launched in December 2021, has allowed for an even clearer view of the so-called Phantom Galaxy than astronomers had ever seen before.  

“Webb’s sharp vision has revealed delicate filaments of gas and dust in the grandiose spiral arms which wind outwards from the center of this image,” NASA and the ESA said Monday. 

“A lack of gas in the nuclear region also provides an unobscured view of the nuclear star cluster at the galaxy’s center,” the agencies said in a statement.

The whirling celestial form, officially called M74, is located in the Pisces constellation 32 million light-years away from Earth. 

The Webb image shows the galaxy’s brilliant white, red, pink and light blue appendages of dust and stars swirling around a bright blue center, all set against the dark backdrop of deep space. 

M74 was previously photographed by the Hubble telescope, which captured the galaxy’s spiraling blue and pink arms, but instead showed its glowing center as a soft yellow. 

The Phantom Galaxy is a “favorite target for astronomers studying the origin and structure of galactic spirals,” NASA and the ESA said. The picture taken by Webb will help them “learn more about the earliest phases of star formation in the local Universe,” and record more information about 19 star-forming galaxies close to our own Milky Way. 

Astronomers will also use the picture to “pinpoint star-forming regions in the galaxies, accurately measure the masses and ages of star clusters, and gain insights into the nature of the small grains of dust drifting in interstellar space,” the statement said. 

Webb’s new pictures have thrilled the space community as the telescope orbits the Sun at a distance of a million miles (1.6 million kilometers) from Earth, in a region of space called the second Lagrange point.

The telescope, which has a primary mirror more than 21 feet (6.5 meters) wide, is an international collaboration between NASA, the ESA and the Canadian Space Agency. It is expected to operate for approximately 20 years.

(AFP)

Read original article here

Canada Now Willing to Punish Crimes Committed on the Moon

Astronauts may now face criminal charges for crimes committed on the way to the Moon.
Photo: NASA/Bill Stafford

More than 50 years ago, Apollo astronauts left 96 bags of their own waste on the surface of the Moon. But they didn’t exactly fear getting hit with a fine for littering, as space—the Moon included—has been a largely lawless region. Canadian law makers are hoping to change that.

Canada amended its criminal code on Thursday to allow for the prosecution of crimes committed by Canadian astronauts during trips to the Moon or on the lunar surface itself. Foreign astronauts who threaten the life or security of a Canadian astronaut can also be punished by Canadian law, according to broadcaster CBC.

Canada’s criminal code had already included crimes committed by its astronauts aboard the International Space Station as punishable by law. But the recent amendment now accounts for the Canadian Space Agency’s participation in the upcoming Artemis program, through which NASA intends on sending people back to the Moon’s surface later this decade, and possibly as early as 2025.

The Artemis 2 mission, in which a crewed Orion capsule will travel to the Moon and back without landing, will include a Canadian astronaut. Canada is also contributing a robotic arm to the Lunar Gateway, a planned outpost in orbit around the Moon. The European Space Agency, as well as Japan’s Aerospace Exploration Agency, are also taking part in the Artemis program.

As these international collaborations take shape in the midst of an evolving industry, it has become more crucial to reconsider the laws currently in place when it comes to governing space. As it stands, space is loosely governed by the Outer Space Treaty of 1967, which was penned in light of the space race between the U.S. and the Soviet Union. The treaty hasn’t been updated since, and article six of the Outer Space Treaty states that nations will supervise the activities of their citizens in space.

Read original article here

ExoMars 2022 Launch ‘Very Unlikely’ Due to Russia’s Ukraine Invasion

A working prototype of the ExoMars rover at the Airbus Defense Space facility on February 7, 2019 in Stevenage, England.
Photo: Dan Kitwood (Getty Images)

The ExoMars rover, previously expected to hurtle toward Mars later this year, really can’t seem to catch a break. After facing multiple delays caused by testing issues and the pandemic, the mission faces yet another setback: war.

That’s according to a recent statement released by the European Space Agency, which said the current situation has jeopardized any 2022 launch.

“We are fully implementing sanctions imposed on Russia by our Member States,” the ESA said in a statement. “Regarding the ExoMars programme continuation, the sanctions and the wider context make a launch in 2022 very unlikely.”

ExoMars is a joint mission between the ESA and Russian state space agency Roscosmos. It’s intended to search for organic molecules or even signs of life on the Red Planet. The ExoMars rover was expected to launch this fall and eventually land on Mars sometime in 2023, where it would have joined NASA’s two rovers and lander and another rover launched by China already operating on the planet. Last week’s military action against Ukraine and the ensuing international sanctions have now made that timeline a pipedream.

ESA Director General Josef Aschbacher acknowledged the delay on Monday, describing the escalating war in Ukraine as a “crisis.”

“We deplore the tragic events taking place in Ukraine, a crisis which escalated dramatically into war in recent days,” Aschbacher said. “Many difficult decisions are now being taken at ESA in consideration of the sanctions implemented by the governments of our Member States.”

That bad piece of news sounds somewhat familiar. ExoMars was once scheduled for a summer 2020 launch, but that was pushed back due to a combination of technical delays and, like so much else in the past two years, the covid-19 pandemic. The first mission of the ExoMars program, which arrived at Mars in 2016, was a mixed success: All went well with the Trace Gas Orbiter satellite, which now circles Mars and delivers fascinating scientific results; but the Schiaparelli lander that arrived with it crashed on the Martian surface, after a miscalculation told its software it was below the ground rather than 2 miles above it.

The ideal launch opportunity for a spacecraft making its way to Mars only occurs once every 26 months, meaning unsuspected hiccups can lead to lengthy delays.

Read original article here

James Webb space telescope engineers take extra time to ensure smooth sunshade deploy

Engineers activating the James Webb Space Telescope decided Sunday to hold off tightening the observatory’s critical sunshade to allow more time to check out the performance of its power systems and overall behavior now that several major deployments are complete.

“Nothing we can learn from simulations on the ground is as good as analyzing the observatory when it’s up and running,” Bill Ochs, the Webb project manager, said in a NASA blog post Sunday. “Now is the time … to learn everything we can about its baseline operations. Then we will take the next steps.”

NASA is not providing “live” coverage of Webb’s deployments and has not held a media briefing since the telescope’s launch on Christmas Day. But the latest blog post said engineers wanted to more thoroughly characterize the telescope’s performance now that it’s finally in space while making sure motors needed for sunshade tensioning are at the “optimal” temperatures before proceeding.

No technical details were provided, but the two-day sunshade tensioning process could begin as early as Monday.

A frame from a NASA animation showing the James Webb Space Telescope’s current state, with its five-layer sunshield deployed but not yet pulled taut.

NASA


Since its launch on Christmas Day, Webb has successfully fine-tuned its trajectory with two precision thruster firings, deployed its critical solar panel, unlimbered the high-gain antenna it will use to relay science data back to Earth and extended a “momentum flap” to counteract the destabilizing pressure of the solar wind.

It’s also elevated its primary mirror and science instruments by about four feet to further isolate them from the heat generated by on-board electronics and other systems.

On Friday, two telescoping booms extended to either side of two pallets, pulling out and unfolding Webb’s tennis court-size sunshade to kick off one of the most complex procedures in the observatory’s initial activation.

Once the sunshade is properly tensioned, gaps between each layer will help dissipate heat, passively cooling Webb to within a few degrees of absolute zero, required for the observatory to detect infrared light from the first stars and galaxies to form in the aftermath of the Big Bang.

NASA


Made up of five hair-thin Kapton layers, the sunshade is critical to Webb’s goal of capturing faint light from the first stars and galaxies to light up in the wake of the Big Bang birth of the cosmos nearly 14 billion years ago.

To register that ancient radiation, now stretched out into the infrared by the expansion of space itself, Webb must be chilled to within 50 degrees of absolute zero, or nearly 400 degrees below zero Fahrenheit. The light- and heat-blocking shield needed to do that, which was folded up for launch like a skydiver’s parachute, is in the process of being extracted.

The two pallets holding the sunshade were deployed and locked in place Tuesday, one on either side of Webb’s 21.3-foot primary mirror. On Thursday, protective covers were commanded to roll off each pallet, exposing the still-folded sunshade membranes to space.

The actual deployment began Friday when the two telescoping booms at right angles to the pallets began extending, one at a time, slowly pulling out both sides of the shield and unfolding the membranes in the process.

That work started later than expected to give engineers time to confirm 107 membrane retention devices, used to hold the folded layers in place during launch, had worked as required.

They did, and with both booms extended to give the sunshade its iconic kite-like shape, all five layers must now be pulled taut using motor-driven cables running through scores of pulleys. Tensioning is required to produce a gap between each layer, providing space for excess heat to migrate outward to the sides.

Because the boom extension work took longer than expected, mission managers put tensioning on hold Saturday to give the team a chance to catch its collective breath. Another delay was ordered Sunday, in part to make sure the motors needed for the shade’s full extraction were at the required temperatures.

“We’ve spent 20 years on the ground with Webb, designing, developing and testing,” said Mike Menzel, Webb’s lead systems engineer. “We’ve had a week to see how the observatory actually behaves in space. It’s not uncommon to learn certain characteristics of your spacecraft once you’re in flight. That’s what we’re doing right now.

“So far, the major deployments we’ve executed have gone about as smoothly as we could have hoped for. But we want to take our time and understand everything we can about the observatory before moving forward.”

Read original article here