时间:2025-04-02 12:51:39 来源:网络整理编辑:時尚
From over 100 miles above the surface, a NASA satellite spotted dry ice and gullies inside a Martian
From over 100 miles above the surface, a NASA satellite spotted dry ice and gullies inside a Martian crater.
It gets quite chilly on Mars during its winter — NASA's rovers contend with temperatures of -140 degrees Fahrenheit, though it gets much colder at the poles — allowing carbon dioxide in the atmosphere to condense into dry ice.
iRobot Roomba Combo i3+ Self-Emptying Robot Vacuum and Mop—$329.99(List Price $599.99)
Samsung Galaxy Tab A9+ 10.9" 64GB Wi-Fi Tablet—$169.99(List Price $219.99)
Apple AirPods Pro 2nd Gen With MagSafe USB-C Charging Case—$189.99(List Price $249.00)
Eero 6 Dual-Band Mesh Wi-Fi 6 System (Router + 2 Extenders)—$149.99(List Price $199.99)
Apple Watch Series 9 (GPS, 41mm, Midnight, S/M, Sports Band)—$299.00(List Price $399.00)
In this image, wintertime CO2 frost is found closer to the equator, where it's usually a bit too "warm" for dry ice to exist. Yet inside parts of the crater that receive less sunlight, frost has formed.
But that's not all. Also visible is another curious sight on Mars: gullies. These are channels or trenches cut into the surface. The CO2 frost can act like a fluid and flow in, or form, gullies.
Tweet may have been deletedSEE ALSO:Why landing a spaceship on the moon is still so challenging
Compelling Mars photo shows Martian water flowed way more recently than we think
The mega-comet hurtling through our solar system is 85, yes 85, miles wide
Private astronaut brings an item of mythic proportions to space station
Mars contains some water ice, too. In the planet's frigid Korolev crater, ice brims inside this deep basin year-round.
Planetary scientists have found evidence that water once flowed on Mars, perhaps as "recently" as 2 billion years ago. And perhaps some 4 billion years ago, it's possible Mars was even a largely blue world, with enough water to cover large swathes of the planet.
Today, the planet's surface is a harsh, dusty desert. NASA's robotic rovers are now sleuthing this arid world for any signs of primitive, past life.
TopicsNASA
Donald Trump's tangled web of Russian influence2025-04-02 12:45
國足行李過多創紀錄行程延誤 重返沙迦足協租下整座酒店2025-04-02 12:25
國足沙迦備戰急需熱身賽 12強賽非同組球隊成首選2025-04-02 12:16
唐佳麗社媒曬中國球迷來信 :此刻的我充滿了力量2025-04-02 12:03
Singapore rolls out video2025-04-02 11:38
拜仁VS萊比錫前瞻 :納帥反戈舊主 薩內延續強勢 ?2025-04-02 11:23
奧斯卡30歲生日希望全隊再接再厲 取得令人滿意的成績2025-04-02 11:04
巴薩公布新賽季歐冠專屬球衣 以城市地標為靈感2025-04-02 10:59
There's a big piece of fake chicken stuck to this phone case2025-04-02 10:49
陝西女足U18隊全運會創曆史 點球戰勝山東隊摘銅2025-04-02 10:16
Olympian celebrates by ordering an intimidating amount of McDonald's2025-04-02 12:48
粵媒 :應給李鐵和國足更多空間 遠離喧囂靜心備戰2025-04-02 12:39
恒大退出中國足壇再添實錘 !廣州市體育局未回應是否托管2025-04-02 12:33
曼晚確認曼聯大名單:C羅領銜 B費博格巴桑喬在列2025-04-02 12:17
Tourist survives for month in frozen New Zealand wilderness after partner dies2025-04-02 11:58
全運U18女足上海42025-04-02 11:43
安然執法5人製世界杯 為中國足球裁判爭光2025-04-02 11:36
FIFA官方:巴西足協撤銷5天禁賽 球員可踢本周英超2025-04-02 10:29
More than half of women in advertising have faced sexual harassment, report says2025-04-02 10:28
克羅斯:希望弗裏克能帶隊成功 不用再考慮征召我2025-04-02 10:10