Artemis moonship returns to Earth with picture-perfect Pacific Ocean splashdown | Canada News Media
Connect with us

Science

Artemis moonship returns to Earth with picture-perfect Pacific Ocean splashdown

Published

 on

NASA’s Artemis 1 moonship returned to Earth Sunday, slamming into the upper atmosphere at more than 24,000 mph and enduring a 5,000-degree re-entry inferno before settling to a picture perfect splashdown in the Pacific Ocean to close out a 25-day 1.4-million-mile test flight to the moon and back.

Descending under three huge parachutes, the unpiloted 9-ton Orion capsule gently hit the water 200 miles west of Baja California at 12:40 p.m. EST, 20 minutes after encountering the first traces of the discernible atmosphere 76 miles up.

“I’m overwhelmed. This is an extraordinary day,” said NASA Administrator Bill Nelson. “It’s historic, because we are now going back into deep space with a new generation.”

NASA’s unpiloted Orion capsule descends to splashdown Sunday in the Pacific Ocean west of Baja California to close out 25-day test flight around the moon and back. The mission is expected to help pave the way toward the first piloted Artemis moon mission in 2024. 

Network TV Pool (above and below)

 

In an appropriate if unplanned coincidence, the splashdown came 50 years to the day after the final Apollo 17 moon landing in 1972 and just 10 hours after SpaceX launched a Japanese moon lander, the first sent up in a purely a commercial venture, from Cape Canaveral.

“From Tranquility Base to Taurus-Littrow to the tranquil waters of the Pacific, the latest chapter of NASA’s journey to the moon comes to a close. Orion, back on Earth,” said NASA commentator Rob Navias at the moment of Orion’s splashdown, referring to the Apollo 11 and 17 landing sites.

Nelson also reflected on Apollo, saying President John F. Kennedy “stunned everybody with the Apollo generation, and said that we were going to achieve what we thought was impossible.”

“It’s a new day,” Nelson said. “A new day has dawned. And the Artemis generation is taking us there.”

The Orion capsule is towed toward the flooded well deck of the USS Portland, an amphibious transport dock ship. Once inside, the deck will be sealed, the water pumped out and the spacecraft will be left on a protective cradle for the trip back to Naval Base San Diego.  

NASA

 

A joint Navy-NASA recovery team was standing by within sight of the Orion splashdown to inspect the scorched capsule and, after a final round of tests, tow it into the flooded well deck of the USS Portland, an amphibious dock ship.

After the sea water is pumped out, Orion will settle onto a protective cradle for the voyage back to Naval Base San Diego and, eventually, a trip home to the Kennedy Space Center.

Re-entry and splashdown were the final major objectives of the Artemis 1 test flight, giving engineers confidence the spacecraft’s 16.5-foot-wide Apollo-derived Avcoat heat shield and parachutes will work as designed when four astronauts return from the moon after the next Artemis flight in 2024.

Testing the heat shield was, in fact, the top priority of the Artemis 1 mission, “and it is our priority-one objective for a reason,” mission manager Mike Sarafin said Friday.

“There is no arc jet or aerothermal facility here on Earth capable of replicating hypersonic reentry with a heat shield of this size,” he said. “And it is a brand new heat shield design, and it is a safety-critical piece of equipment. It is designed to protect the spacecraft and (future astronauts) … so the heat shield needs to work.”

And it apparently did just that, with no obvious signs of any major damage. Likewise, all three main parachutes deployed normally as did airbags needed to stabilize the capsule in light ocean swells.

A camera on one of the Orion capsule’s four solar wings captured spectacular images of Earth as the spacecraft closed in Sunday for re-entry and splashdown. This shot came down less than one our before re-entry. 

NASA

 

A successful test flight was “what we need in order to prove this vehicle so that we can fly with a crew,” said Deputy Administrator Bob Cabana, a former space shuttle commander. “And that’s the next step, and I can’t wait. … A few minor glitches along the way, but (overall) it performed flawlessly.”

Launched Nov. 16 on the maiden flight of NASA’s huge new Space Launch System rocket, the unpiloted Orion capsule was boosted out of Earth orbit and on to the moon for an exhaustive series of tests, putting its propulsion, navigation, power and computer systems through their paces in the deep space environment.

The Orion flew through half of a “distant retrograde orbit” around the moon that carried it farther from Earth — 268,563 miles — than any previous human-rated spacecraft. Two critical firings of its main engine set up a low-altitude lunar flyby last Monday that, in turn, put the craft on course for splashdown Sunday.

NASA originally planned to bring the ship down west of San Diego, but a predicted cold front bringing higher winds and rougher seas prompted mission managers to move the landing site south by about 350 miles, to a point just south of Guadalupe Island some 200 miles west of Baja California.

After a final trajectory correction maneuver early Sunday, the Orion spacecraft plunged back into the discernible atmosphere at an altitude of 400,000 feet at 12:20 p.m.

The re-entry profile was designed to ensure that Orion skipped once across the top of the atmosphere like a flat stone skipping across calm water before making its final descent. As expected, Orion plunged from 400,000 feet to an altitude of about 200,000 feet in just two minutes, then climbed back up to about 295,000 feet before resuming its computer-guided fall to Earth.

Within a minute and a half of entry, atmospheric friction began generating temperatures across the heat shield reaching nearly 5,000 degrees Fahrenheit — half the temperature of the sun’s visible surface — enveloping the spacecraft in an electrically charged plasma that blocked communications with flight controllers for about five minutes.

The Orion spacecraft followed an unusual “skip entry” trajectory during its return to Earth, skipping off the top of the discernible atmosphere like a stone across calm water before a second plunge to splashdown. 

NASA

 

After another two-and-a-half minute communications blackout during its second drop into the lower atmosphere, the spacecraft continued decelerating as it closed in on the landing site, slowing to around 650 mph, roughly the speed of sound, about 15 minutes after the entry began.

Finally, at an altitude of about 22,000 feet and a velocity of just under 300 mph, small drogue parachutes deployed, pulling off a protective cover along with three pilot chutes. Finally, in a welcome sight to the nearby recovery crew, the capsule’s main parachutes unfurled at an altitude of about 5,000 feet, slowing Orion to a sedate 18 mph or so for splashdown.

Mission duration was 25 days 10 hours 52 minutes.

“It was an incredible mission. We accomplished all of our major mission objectives,” said Michelle Zahner, an Orion mission planning engineer. “The vehicle performed every bit as well as we hoped and even better in a lot of ways.

“This is the farthest any human-rated spacecraft has ever gone, and that required a lot of complex analysis and mission planning. To see it all come together and have such a successful test mission was amazing.”

While flight controllers ran into still-unexplained glitches with its power system, initial “funnies” with its star trackers and degraded performance from a phased array antenna, the Orion spacecraft and its European Space Agency-built service module worked well overall, achieving virtually all of their major objectives.

Throughout the Artremis 1 mission, cameras aboard the Orion capsule beamed back spectacular images of the moon and Earth, giving flight controllers – and the public – a ringside seat during the 25-day test flight. 

NASA (both)

 

If all goes well, NASA plans to follow the Artemis 1 mission by sending four astronauts around the moon in the program’s second flight — Artemis 2 — in 2024. The first moon-landing would follow in the 2025-26 timeframe when NASA says the first woman and the next man will set foot on the lunar surface near the south pole.

While the 2024 flight seems achievable based on the results of the Artemis 1 mission, the Artemis 3 moon landing faces a much more challenging schedule, requiring good performance during the Artemis 3 mission and successful development and testing of the lunar lander NASA is paying SpaceX $2.9 billion to develop.

The lander, a variant of the company’s Starship rocket, has not yet flown to space. But it will require multiple robotic refueling flights in low-Earth orbit before heading to the moon to await rendezvous by astronauts launched aboard an Orion capsule.

SpaceX and NASA have provided few details about the development of the Starship moon lander and it’s not yet known when it will be ready to safely carry astronauts to the moon.

Source link

Continue Reading

News

The ancient jar smashed by a 4-year-old is back on display at an Israeli museum after repair

Published

 on

 

TEL AVIV, Israel (AP) — A rare Bronze-Era jar accidentally smashed by a 4-year-old visiting a museum was back on display Wednesday after restoration experts were able to carefully piece the artifact back together.

Last month, a family from northern Israel was visiting the museum when their youngest son tipped over the jar, which smashed into pieces.

Alex Geller, the boy’s father, said his son — the youngest of three — is exceptionally curious, and that the moment he heard the crash, “please let that not be my child” was the first thought that raced through his head.

The jar has been on display at the Hecht Museum in Haifa for 35 years. It was one of the only containers of its size and from that period still complete when it was discovered.

The Bronze Age jar is one of many artifacts exhibited out in the open, part of the Hecht Museum’s vision of letting visitors explore history without glass barriers, said Inbal Rivlin, the director of the museum, which is associated with Haifa University in northern Israel.

It was likely used to hold wine or oil, and dates back to between 2200 and 1500 B.C.

Rivlin and the museum decided to turn the moment, which captured international attention, into a teaching moment, inviting the Geller family back for a special visit and hands-on activity to illustrate the restoration process.

Rivlin added that the incident provided a welcome distraction from the ongoing war in Gaza. “Well, he’s just a kid. So I think that somehow it touches the heart of the people in Israel and around the world,“ said Rivlin.

Roee Shafir, a restoration expert at the museum, said the repairs would be fairly simple, as the pieces were from a single, complete jar. Archaeologists often face the more daunting task of sifting through piles of shards from multiple objects and trying to piece them together.

Experts used 3D technology, hi-resolution videos, and special glue to painstakingly reconstruct the large jar.

Less than two weeks after it broke, the jar went back on display at the museum. The gluing process left small hairline cracks, and a few pieces are missing, but the jar’s impressive size remains.

The only noticeable difference in the exhibit was a new sign reading “please don’t touch.”

The Canadian Press. All rights reserved.

Source link

Continue Reading

News

B.C. sets up a panel on bear deaths, will review conservation officer training

Published

 on

 

VICTORIA – The British Columbia government is partnering with a bear welfare group to reduce the number of bears being euthanized in the province.

Nicholas Scapillati, executive director of Grizzly Bear Foundation, said Monday that it comes after months-long discussions with the province on how to protect bears, with the goal to give the animals a “better and second chance at life in the wild.”

Scapillati said what’s exciting about the project is that the government is open to working with outside experts and the public.

“So, they’ll be working through Indigenous knowledge and scientific understanding, bringing in the latest techniques and training expertise from leading experts,” he said in an interview.

B.C. government data show conservation officers destroyed 603 black bears and 23 grizzly bears in 2023, while 154 black bears were killed by officers in the first six months of this year.

Scapillati said the group will publish a report with recommendations by next spring, while an independent oversight committee will be set up to review all bear encounters with conservation officers to provide advice to the government.

Environment Minister George Heyman said in a statement that they are looking for new ways to ensure conservation officers “have the trust of the communities they serve,” and the panel will make recommendations to enhance officer training and improve policies.

Lesley Fox, with the wildlife protection group The Fur-Bearers, said they’ve been calling for such a committee for decades.

“This move demonstrates the government is listening,” said Fox. “I suspect, because of the impending election, their listening skills are potentially a little sharper than they normally are.”

Fox said the partnership came from “a place of long frustration” as provincial conservation officers kill more than 500 black bears every year on average, and the public is “no longer tolerating this kind of approach.”

“I think that the conservation officer service and the B.C. government are aware they need to change, and certainly the public has been asking for it,” said Fox.

Fox said there’s a lot of optimism about the new partnership, but, as with any government, there will likely be a lot of red tape to get through.

“I think speed is going to be important, whether or not the committee has the ability to make change and make change relatively quickly without having to study an issue to death, ” said Fox.

This report by The Canadian Press was first published Sept. 9, 2024.

The Canadian Press. All rights reserved.

Source link

Continue Reading

Science

Asteroid Apophis will visit Earth in 2029, and this European satellite will be along for the ride

Published

 on

The European Space Agency is fast-tracking a new mission called Ramses, which will fly to near-Earth asteroid 99942 Apophis and join the space rock in 2029 when it comes very close to our planet — closer even than the region where geosynchronous satellites sit.

Ramses is short for Rapid Apophis Mission for Space Safety and, as its name suggests, is the next phase in humanity’s efforts to learn more about near-Earth asteroids (NEOs) and how we might deflect them should one ever be discovered on a collision course with planet Earth.

In order to launch in time to rendezvous with Apophis in February 2029, scientists at the European Space Agency have been given permission to start planning Ramses even before the multinational space agency officially adopts the mission. The sanctioning and appropriation of funding for the Ramses mission will hopefully take place at ESA’s Ministerial Council meeting (involving representatives from each of ESA’s member states) in November of 2025. To arrive at Apophis in February 2029, launch would have to take place in April 2028, the agency says.

This is a big deal because large asteroids don’t come this close to Earth very often. It is thus scientifically precious that, on April 13, 2029, Apophis will pass within 19,794 miles (31,860 kilometers) of Earth. For comparison, geosynchronous orbit is 22,236 miles (35,786 km) above Earth’s surface. Such close fly-bys by asteroids hundreds of meters across (Apophis is about 1,230 feet, or 375 meters, across) only occur on average once every 5,000 to 10,000 years. Miss this one, and we’ve got a long time to wait for the next.

When Apophis was discovered in 2004, it was for a short time the most dangerous asteroid known, being classified as having the potential to impact with Earth possibly in 2029, 2036, or 2068. Should an asteroid of its size strike Earth, it could gouge out a crater several kilometers across and devastate a country with shock waves, flash heating and earth tremors. If it crashed down in the ocean, it could send a towering tsunami to devastate coastlines in multiple countries.

Over time, as our knowledge of Apophis’ orbit became more refined, however, the risk of impact  greatly went down. Radar observations of the asteroid in March of 2021 reduced the uncertainty in Apophis’ orbit from hundreds of kilometers to just a few kilometers, finally removing any lingering worries about an impact — at least for the next 100 years. (Beyond 100 years, asteroid orbits can become too unpredictable to plot with any accuracy, but there’s currently no suggestion that an impact will occur after 100 years.) So, Earth is expected to be perfectly safe in 2029 when Apophis comes through. Still, scientists want to see how Apophis responds by coming so close to Earth and entering our planet’s gravitational field.

“There is still so much we have yet to learn about asteroids but, until now, we have had to travel deep into the solar system to study them and perform experiments ourselves to interact with their surface,” said Patrick Michel, who is the Director of Research at CNRS at Observatoire de la Côte d’Azur in Nice, France, in a statement. “Nature is bringing one to us and conducting the experiment itself. All we need to do is watch as Apophis is stretched and squeezed by strong tidal forces that may trigger landslides and other disturbances and reveal new material from beneath the surface.”

The Goldstone radar’s imagery of asteroid 99942 Apophis as it made its closest approach to Earth, in March 2021. (Image credit: NASA/JPL–Caltech/NSF/AUI/GBO)

By arriving at Apophis before the asteroid’s close encounter with Earth, and sticking with it throughout the flyby and beyond, Ramses will be in prime position to conduct before-and-after surveys to see how Apophis reacts to Earth. By looking for disturbances Earth’s gravitational tidal forces trigger on the asteroid’s surface, Ramses will be able to learn about Apophis’ internal structure, density, porosity and composition, all of which are characteristics that we would need to first understand before considering how best to deflect a similar asteroid were one ever found to be on a collision course with our world.

Besides assisting in protecting Earth, learning about Apophis will give scientists further insights into how similar asteroids formed in the early solar system, and, in the process, how  planets (including Earth) formed out of the same material.

One way we already know Earth will affect Apophis is by changing its orbit. Currently, Apophis is categorized as an Aten-type asteroid, which is what we call the class of near-Earth objects that have a shorter orbit around the sun than Earth does. Apophis currently gets as far as 0.92 astronomical units (137.6 million km, or 85.5 million miles) from the sun. However, our planet will give Apophis a gravitational nudge that will enlarge its orbit to 1.1 astronomical units (164.6 million km, or 102 million miles), such that its orbital period becomes longer than Earth’s.

It will then be classed as an Apollo-type asteroid.

Ramses won’t be alone in tracking Apophis. NASA has repurposed their OSIRIS-REx mission, which returned a sample from another near-Earth asteroid, 101955 Bennu, in 2023. However, the spacecraft, renamed OSIRIS-APEX (Apophis Explorer), won’t arrive at the asteroid until April 23, 2029, ten days after the close encounter with Earth. OSIRIS-APEX will initially perform a flyby of Apophis at a distance of about 2,500 miles (4,000 km) from the object, then return in June that year to settle into orbit around Apophis for an 18-month mission.

Related Stories:

Furthermore, the European Space Agency still plans on launching its Hera spacecraft in October 2024 to follow-up on the DART mission to the double asteroid Didymos and Dimorphos. DART impacted the latter in a test of kinetic impactor capabilities for potentially changing a hazardous asteroid’s orbit around our planet. Hera will survey the binary asteroid system and observe the crater made by DART’s sacrifice to gain a better understanding of Dimorphos’ structure and composition post-impact, so that we can place the results in context.

The more near-Earth asteroids like Dimorphos and Apophis that we study, the greater that context becomes. Perhaps, one day, the understanding that we have gained from these missions will indeed save our planet.

 

Source link

Continue Reading

Trending

Exit mobile version