someone who is trained to travel and work in space

宇航员, 航天员
a large structure used as a long-term base for people to stay in space and conduct research

空间站, 太空站
any of the rocky bodies orbiting the sun, ranging greatly in diameter, also found in large numbers between Jupiter and Mars

小行星, 星体
a scientist who studies or observes planets, stars, and other happenings in the universe

天文学家, 天文工作者
the earth's atmosphere and the space beyond it

航空航天, 宇航
a specific group of stars that form a pattern and have a name related to their shape

星座, 星群
a piece of rock coming from outer space that passes through the Earth's atmosphere, producing light

流星, 陨石
having or seeming to have no or little weight, caused by the absence of gravity

无重的, 失重的
(of the moon) to gradually decrease in its visible illuminated surface as it progresses from full to new moon

减弱, 衰退
