美国国家航空航天局NASA每日一图(天文)-2017年7月23日

2017 July 23

Mercury as Revealed by MESSENGER
Image Credit: MESSENGER, NASA, JHU APL, CIW
Explanation: Mercury had never been seen like this before. In 2008, the robotic MESSENGER spacecraft buzzed past Mercury for the second time and imaged terrain mapped previously only by comparatively crude radar. The featured image was recorded as MESSENGER looked back 90 minutes after passing, from an altitude of about 27,000 kilometers. Visible in the image, among many other newly imaged features, are unusually long rays that appear to run like meridians of longitude out from a young crater near the northern limb. MESSENGER entered orbit around Mercury in 2011 and finished its primary mission in 2012, but took detailed measurements until 2015, at which time it ran out of fuel and so was instructed to impact Mercury's surface.

2017年7月23日

水星由MESSENGER揭示
图片来源: MESSENGER, NASA, JHU APL, CIW
说明: 汞从来没有见过这样的事情。2008年,机器人“ 信使”号飞船 第二次嗡嗡响过 水星,而以前只有比较粗糙的雷达才能映射地形 。该功能的图像记录为 信使传递,从27000公里高度后,回头一看,90分钟。可见图像中,许多其他新成像的特征之一,是非常长 的光线,似乎像运行 经脉的 经度 从附近的北翼年轻火山口出来。 MESSENGER于2011年进入水星轨道,2012年完成了主要任务,但直到2015年日才进行了详细的测量,当时燃料用完了,因此被指示撞击水星表面。

评论已关闭