时间:2025-08-02 09:34:59 来源:网络整理编辑:娛樂
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
Australian football makes history with first LGBT Pride Game2025-08-02 09:08
Coworkers Photoshopped a sleeping intern into an affectionate meme2025-08-02 09:00
'Hamilton' scalpers pocket $240,000 every week. Here's how they get away with it.2025-08-02 08:53
Is the iPhone 7 going to have a damn headphone jack or not?2025-08-02 08:52
Fyvush Finkel, Emmy winner for 'Picket Fences,' dies at 932025-08-02 08:32
Tiny Bob Ross2025-08-02 08:21
Radiohead shares 'Daydreaming' video from new album coming Sunday2025-08-02 07:57
Is the iPhone 7 going to have a damn headphone jack or not?2025-08-02 07:51
Chinese gymnastics team horrifies crowd with human jump rope2025-08-02 07:49
Here's all the merch you'll want from Justin Bieber's Purpose World Tour2025-08-02 07:43
Cat gets stuck in the most awkward position ever2025-08-02 09:32
Photos and videos show devastation of Canadian wildfires2025-08-02 09:02
Reddit has just about proven Godwin's Law2025-08-02 09:00
GoPro's drone delayed until the holidays2025-08-02 08:43
Sound the alarms: Simone Biles finally met Zac Efron2025-08-02 08:05
Photos and videos show devastation of Canadian wildfires2025-08-02 08:01
Coworkers Photoshopped a sleeping intern into an affectionate meme2025-08-02 07:39
Chelsea Handler is not impressed with late night, lightly disses Stephen Colbert and E!2025-08-02 07:32
J.K. Rowling makes 'Harry Potter' joke about Olympics event2025-08-02 07:23
Photos and videos show devastation of Canadian wildfires2025-08-02 07:19