时间:2025-02-28 23:18:38 来源:网络整理编辑:綜合
Our solar system is a dynamic, evolving realm of space.A powerful camera aboard NASA's Mars Reconnai
Our solar system is a dynamic, evolving realm of space.
A powerful camera aboard NASA's Mars Reconnaissance Orbiter — a satellite orbiting the red planet — spotted a relatively recent impact site on the Martian surface. The spacecraft detected a dark spot on the ground, and then the high-resolution camera (called the High-Resolution Imaging Experiment) snapped the detailed shot.
The impact, which is brand new in cosmic terms, likely formed between February 2006 and March 2014, noted the imaging team at the University of Arizona. For a size reference, the entire black and white image is under five kilometers, or some 3 miles, across. Blasted-out rays of material are clearly visible around the crater, which formed from a falling asteroid or meteorite.
Tweet may have been deletedSEE ALSO:If a scary asteroid will actually strike Earth, here's how you'll know
Compelling Mars photo shows Martian water flowed way more recently than we think
Scientists detect something really unexpected beneath Saturn's 'Death Star' moon
The mega-comet hurtling through our solar system is 85, yes 85, miles wide
Mars is absolutely covered in craters. NASA estimates there are over a quarter-million impact craters about the size of Arizona's famous Barringer Crater, which is some 4,000 feet across. And there are over 43,000 Martian craters larger than three miles wide.
Meanwhile, Earth has just around 120 known impact craters. That's because over hundreds of millions of years, different parts of Earth's surface have both been covered in lava or recycled as the giant plates that compose Earth's crust (tectonic plates) continually move rock below and back up to the surface. Mars isn't nearly geologically dead — marsquakes frequently occur there — but it's not nearly as active as Earth, a water-blanketed planet teeming with erupting volcanoes. On Mars today, there's little to wash away, or cover up, new craters.
One of Mars' most recent impact craters, then, might be visible for millions and millions of years.
TopicsNASA
The Weeknd teases new music in Instagram post2025-02-28 22:47
Vladimir Putin says Donald Trump's victory gives him 'hope'2025-02-28 22:25
With the Cubs' World Series win, Theo Epstein is the official Breaker of Curses2025-02-28 22:16
NBC announces 'Bye Bye Birdie Live!' starring Jennifer Lopez2025-02-28 22:09
'Rocket League' Championship Series Season 2 offers $250,000 prize pool2025-02-28 21:53
This letter to Americans has an important message ahead of elections2025-02-28 21:38
Americans are suddenly finding 'Rogue One' a lot more relevant2025-02-28 21:35
Morrissey and an Australian minister have Twitter beef over animal cruelty2025-02-28 21:24
Nate Parker is finally thinking about the woman who accused him of rape2025-02-28 21:23
You blew it, America: World reacts to a Trump presidency on Twitter2025-02-28 20:32
Tourist survives for month in frozen New Zealand wilderness after partner dies2025-02-28 23:07
After Tinder murder trial, acquitted man paid for cringe2025-02-28 23:05
classpass learns the hard way you can’t just ‘figure out the business model'2025-02-28 23:03
NBC announces 'Bye Bye Birdie Live!' starring Jennifer Lopez2025-02-28 22:54
Richard Branson 'thought he was going to die' in bike accident2025-02-28 22:50
Female tattooist illustrates hip hop icons with stunning photorealism2025-02-28 22:50
This letter to Americans has an important message ahead of elections2025-02-28 22:39
Remembering Ronald Reagan, the Charmer2025-02-28 22:06
Hiddleswift finally followed each other on Instagram after 3 excruciating days2025-02-28 21:10
Twitter users want to trick Clinton supporters to 'vote' via text2025-02-28 20:46