标签: 火星

NASA的好奇号发现火星过去有水的惊人线索

2022年12月16日,即任务的第3,684个火星日,NASA的好奇号使用其Mastcam拍摄了“标记带谷”的360度全景。在这一地区发现的波纹状岩石纹理是火星车所见过的火星古代水和波浪的最清晰证据。 影像来源:NASA/JPL-Caltech/MSSS 在火星车的其他发现中,波纹状的岩石结构表明,在科学家们预计会更干燥的古代火星区域存在湖泊。 去年秋天,当NASA的好奇号火星车抵达“含硫酸盐单元”时,科学家们认为他们看到了湖泊曾经覆盖火星这一地区的最后证据。这是因为这里的岩层形成于比任务早期探索的地区更干燥的环境中。该地区的硫酸盐(含盐矿物质)被认为是在水干涸成细流时所留下的。 因此,好奇号团队惊讶地发现了该任务迄今为止最清楚的证据,证明湖泊中形成了古代水波纹。数十亿年前,浅湖表面的波浪搅动了湖底的沉积物,随...

火星与星团

2022年12月30日 Mars and the Star Clusters Image Credit & Copyright: Gabor Balazs Explanation: At this year’s end Mars still shines brightly in planet Earth’s night as it wanders through the head-strong constellation Taurus. Its bright yellowish hue dominates this starry field of view that includes Taurus’ alpha star Aldebaran and the Hyad...

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, but not usually in the north, and are found only in craters l...

NASA的毅力号火星车在火星表面存放了第一个样本

12月21日,NASA的毅力号火星车将一个装有岩石样本的钛管放置在这颗红色星球的表面。在接下来的两个月里,火星车将在这个被称为“三岔口”的地方放置总共10根样品管,这是人类在另一个星球上的第一个样本库。该样本库标志着火星样品返回任务的早期一步。

向洞察号火星着陆器说“再见”

On Dec. 18, 2022, InSight did not respond to communications from Earth. As expected, the lander’s power has been declining for months, and it’s assumed InSight may have reached its end of operations. NASA will declare the mission over when InSight misses two consecutive communication sessions with the spacecraft orbiting Mars, part of the Mars Relay Network ...

满月与盈圆的火星

2022年12月15日 Full Moon, Full Mars Image Credit & Copyright: Tomas Slovinsky Explanation: On December 8 a full Moon and a full Mars were close, both bright and opposite the Sun in planet Earth’s sky. In fact Mars was occulted, passing behind the Moon when viewed from some locations across Europe and North America. Seen from the city of Kosice in eas...