火星计划官网 阿联酋本月将发射阿拉伯世界首个登陆火星计划

阿联酋本月将发射阿拉伯世界首个登陆火星计划  

The first of three international missions to Mars gets underway Tuesday when a Japanese H-2A rocket boosts a United Arab Emirates spacecraft known as "Hope" into space for a seven-month voyage to the red pla. It will be the first interplaary mission ever attempted by an Arab nation.
A little more than a week later
China plans to launch its Tianwen 1 mission
sending its first orbiter and a surface rover to Mars while NASA presses ahead with launch of the agency's $2.4 billion Perseverance Mars rover
equipped with a small drone-like helicopter
on July 30. All three will reach their target in 2021.
The three missions are taking advantage of a plaary launch window that only es around once every 26 months when Earth and Mars are in favorable positions in their orbits around the sun. This year's launch window closes in mid August
and any spacecraft delayed past then will face o years of expensive storage.
这三个任务利用了行星发射窗口，26个月才会出现一次，此时地球和火星在围绕太阳的轨道上处于发射有利位置。今年的发射窗口截止8月中旬，超过这一时限没有发射的航天器就要再等上两年，而且保存费用昂贵。
The European Space Agency had planned to join Emirates
the United States and China
sending a powerful rover to Mars during the current window. But ESA recently was forced to stand down until the next window
primarily because of problems with the parachutes needed to help lower the rover to the martian surface.
And so
the UAE will lead the way this year with the Emirates Mars Mission
and if all goes well
Hope will brake into orbit around Mars next February to kick off a plex mission to shed new light on the physics and chemistry of the martian atmosphere.