Global News

Breaking news & current latest Canadian news headlines; national weather forecasts & predictions, local news videos, money and financial news; sports stats and scores.

https://globalnews.ca/

Two NASA spacecraft record biggest meteor strikes at Mars: ‘We were so lucky’.

Click to play video: 'NASA detects largest meteor strikes on Mars through InSight, Orbiter missions'

WATCH: NASA detects largest meteor strikes on Mars through InSight, Orbiter missions

Two NASA spacecraft at Mars–one on the surface and the other in orbit– have recorded the biggest meteor strikes and impact craters yet.

The high-speed barrages last year sent seismic waves rippling thousands of miles across Mars, the first ever detected near the surface of another planet, and carved out craters nearly 500 feet (150 meters) across, scientists reported Thursday in the journal Science.

The larger of the two strikes churned out boulder-size slabs of ice, which may help researchers look for ways future astronauts can tap into Mars’ natural resources.

The Insight lander measured the seismic shocks, while the Mars Reconnaissance Orbiter provided stunning pictures of the resulting craters.

Imaging the craters “would have been huge already,” but matching it to the seismic ripples was a bonus, said co-author Liliya Posiolova of Malin Space Science Systems in San Diego. “We were so lucky.”

Mars’ atmosphere is thin unlike on Earth, where the thick atmosphere prevents most space rocks from reaching the ground, instead breaking and incinerating them.

A separate study last month linked a recent series of smaller Martian meteoroid impacts with smaller craters closer to InSight, using data from the same lander and orbiter.

The impact observations come as InSight nears the end of its mission because of dwindling power, its solar panels blanketed by dust storms. InSight landed on the equatorial plains of Mars in 2018 and has since recorded more than 1,300 marsquakes.

“It’s going to be heartbreaking when we finally lose communication with InSight,” said Bruce Banerdt of NASA’s Jet Propulsion Laboratory, the lander’s chief scientist who took part in the studies. “But the data it has sent us will certainly keep us busy for years to come.”

READ MORE: NASA will study UFOs, aims to shed light on ‘the unknown’

Banerdt estimated the lander had between four to eight more weeks before power runs out.

The incoming space rocks were between 16 feet and 40 feet (5 meters and 12 meters) in diameter, said Posiolova. The impacts registered about magnitude 4.

The larger of the two struck last December some 2,200 miles (3,500 kilometers) from InSight, creating a crater roughly 70 feet (21 meters) deep. The orbiter’s cameras showed debris hurled up to 25 miles (40 kilometers) from the impact, as well as white patches of ice around the crater, the most frozen water observed at such low latitudes, Posiolova said.

Posiolova spotted the crater earlier this year after taking extra pictures of the region from orbit. The crater was missing from earlier photos, and after poring through the archives, she pinpointed the impact to late December. She remembered a large seismic event recorded by InSight around that time and with help from that team, matched the fresh hole to what was undoubtedly a meteoroid strike. The blast wave was clearly visible.

Scientists also learned the lander and orbiter teamed up for an earlier meteoroid strike, more than double the distance of the December one and slightly smaller.

“Everybody was just shocked and amazed. Another one? Yep,” she recalled.

The seismic readings from the two impacts indicate a denser Martian crust beyond InSight’s location.

“We still have a long way to go to understanding the interior structure and dynamics of Mars, which remain largely enigmatic,” said Doyeon Kim of ETH Zurich’s Institute of Geophysics in Switzerland, who was part of the research.

Outside scientists said future landers from Europe and China will carry even more advanced seismometers. Future missions will “paint a clearer picture” of how Mars evolved, Yingjie Yang and Xiaofei Chen from China’s Southern University of Science and Technology in Shenzhen wrote in an accompanying editorial.

NASASpaceMarsScienceEarthspace newsNASA Marsscience newsMars meteor strikesmeteor strikes

Journalistic standards Report an error

© 2022 The Associated Press

The word “typography” comes from the ancient Greek words τύπος - i.e. “print” - and γράφω - “write, draw”.
Останні новини
How human smuggling runs rampant in border towns

How human smuggling runs rampant in border towns

Fox News contributor Sara Carter discusses the lack of control the Biden admin has on the border crisis on ‘Jesse Watters Primetime.’ Subscribe to Fox News! Watch more Fox News Video: Watch Fox News Channel Live: FOX News Channel (FNC) is a 24-hou...

The Climate Show with Tom Heap

The Climate Show with Tom Heap

A Sky News Climate Show investigation has discovered businesses - and even some households - are switching from mains power to generating electricity from diesel because of soaring energy bills. #skynews #climate SUBSCRIBE to our YouTube channel f...

Does the war in Ukraine make your chapati cheaper? - Global Eyes.

Does the war in Ukraine make your chapati cheaper? - Global Eyes.

Welcome to DW's podcast Global Eyes – a new take on security policy. In our first episode we discuss the effects of Russia's war in Ukraine on the lives of people in India. Hosts Isha Bhatia and Kate Brady are joined by Seema Sirohi, columnist for...

Attorney: Two things concern the community and our nation in the Idaho murders.

Attorney: Two things concern the community and our nation in the Idaho murders.

Fox News contributor Ted Williams and attorney Brian Claypool weigh in on new information in the killings of the four Idaho students and any parallel to a 1969 University of Idaho murder on 'The Story with Martha MacCallum.' #foxnews #thestory Sub...

Putin tells mothers of Russian soldiers killed in Ukraine: 'We share your pain'.

Putin tells mothers of Russian soldiers killed in Ukraine: 'We share your pain'.

President Vladimir Putin on Friday (November 25) met the mothers of soldiers who had been fighting in Ukraine, telling them that he and the entire Russian leadership shared their suffering. The conflict in Ukraine has killed or wounded tens of tho...

Biden picked up the mantra from Barack Obama: Victor Davis Hanson.

Biden picked up the mantra from Barack Obama: Victor Davis Hanson.

Hoover Institution senior fellow Victor Davis Hanson joins 'Tucker Carlson Tonight' to discuss what the midterm 'referendum' means for the Democratic Party. #FoxNews #tucker Subscribe to Fox News! Watch more Fox News Video: Watch Fox News Channel ...