【】

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
相关文章
Two astronauts just installed a new parking spot on the International Space Station
UPDATE: Aug. 19, 2016, 2:04 p.m. EDT。 Astronauts Kate Rubins and Jeff Williams are back in the Inter2025-09-17- 陳戌源鼓勵國足信心不能丟 隊內表示戰日本無需動員_中國隊www.ty42.com 日期:2021-09-05 09:31:00| 評論(已有300562條評論)2025-09-17
- 國足陣容將會“大變臉”? 阿蘭洛國富能否登場最令人關注_日本隊www.ty42.com 日期:2021-09-07 09:01:00| 評論(已有300935條評論)2025-09-17
- 官方:因巴西防疫部門介入 巴西與阿根廷比賽腰斬_球員www.ty42.com 日期:2021-09-06 04:31:00| 評論(已有300709條評論)2025-09-17
Hiddleswift finally followed each other on Instagram after 3 excruciating days
On Aug. 13, 1961, Germany began construction of the Berlin Wall, perhaps the greatest symbol of the2025-09-17- 日媒示弱:國足體能有優勢 日本隊後防或將麵對巨大壓力_中國隊www.ty42.com 日期:2021-09-07 08:31:00| 評論(已有300933條評論)2025-09-17
最新评论