【】

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.
Prime Day deals you can shop right now
Products available for purchase here through affiliate links are selected by our merchandising team. If you buy something through links on our site, Mashable may earn an affiliate commission.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
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 Inter2025-04-30DIYers, save up to 20% on spring essentials at The Home Depot
The following content is brought to you by Mashable partners. If you buy a product featured here, we2025-04-30Tim Cook says he never met Elon Musk, is very coy about Apple Car
Tim Cook confirmed what we were already pretty sure we knew: He never met with Elon Musk about Apple2025-04-30Kia reveals new details for its EV6 electric car with 315
Kia has officially unveiled its first electric vehicle that doesn't have a gasoline or hybrid counte2025-04-30'Rocket League' Championship Series Season 2 offers $250,000 prize pool
Rocket League。's competitive scene is just getting started. 。The 。 Rocket League。Championship Series i2025-04-30Tim Cook says he never met Elon Musk, is very coy about Apple Car
Tim Cook confirmed what we were already pretty sure we knew: He never met with Elon Musk about Apple2025-04-30
最新评论