雪崩、冰爆和沙丘: NASA正在追踪火星上的新年
在地球上，新年往往伴随着冬日的奇幻美景，而火星北半球则经历着一种活跃甚至是“爆炸式”的春季解冻。当我们在地球迎接即将到来的跨年夜时，火星科学家已经抢先了一步：火星在2024年11月12日完成了绕太阳的一次公转。为此，一些研究人员为这个“火星新年”举杯庆祝。
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MRO
NASA·每日一图
火星上的熊？
The Mars Reconnaissance Orbiter (MRO) captured this bit of ursine pareidolia on Dec. 12, 2022. While it resembles a bear we might see on Earth, this is actually a hill on Mars with a peculiar shape. A V-shaped collapse structure makes the nose, two craters form the eyes, and a circular fracture patt
NASA·每日一图
HIRISE发现火星陨石坑沉积物
This image taken by the Mars Reconnaissance Orbiter spacecraft’s HIRISE instrument on Oct. 23, 2022, of the northern plains of Arabia Terra shows craters that contain curious deposits with mysterious shapes and distribution. For instance, the deposits are located on the south sides of the craters, b
NASA·每日一图
红色星球上的蓝色涟漪
Though Mars is the Red Planet, false-color images can help us learn about its weather and geology. This image shows a variety of wind-related features on the Red Planet near the center of Gamboa Crater. Larger sand dunes form sinuous crests and individual domes. There are tiny ripples on the tops of
天文·每日一图
火星探勘号轨道船所见的毅力号着陆点
2021年02月27日 Perseverance Landing Site from Mars Reconnaissance Orbiter Image Credit: NASA/JPL-Caltech/MSSS Explanation: Seen from orbit a day after a dramatic arrival on the martian surface, the Perseverance landing site is identified in this high-resolution view from the Mars Reconnaissance Orbiter
NASA·每日一图
一块极地夹心蛋糕
The Martian ice cap is like a cake with every layer telling a story. In this case, the story is one of climate change on Mars. This image of an exposed section of the north polar layered deposits (NPLD) looks much like a delicious slice of layered tiramisu. The NPLD is made up of water-ice and dust
天文·每日一图
火星上的洞
2020 March 1 A Hole in Mars Image Credit: NASA, JPL, U. Arizona Explanation: What created this unusual hole in Mars? The hole was discovered by chance in 2011 on images of the dusty slopes of Mars’ Pavonis Mons volcano taken by the HiRISE instrument aboard the robotic Mars Reconnaissance Orbit
NASA·每日一图
火星上的沟壑
Gullies on Mars form during the winter, fluidized by carbon dioxide frost, and scientists monitor sites on the planet for activity throughout the year. In this mid-winter scene, a Martian gully is almost completely frosted over the pole-facing slope within the shadow. The map is projected here at a
NASA·每日一图
达尼埃尔森陨石坑的岩层
This image taken by the Mars Reconnaissance Orbiter spacecraft shows sedimentary rock and sand within Danielson Crater, an impact crater about 42 miles or 67 kilometers in diameter, located in the southwest Arabia Terra region of Mars. The rock was formed millions or billions of years ago when loose