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
the natural light coming from the sun

阳光, 日光
the light coming from the moon

月光, 明月之光
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
a branch of science that studies space, planets, etc.

天文学, 宇宙学
a large number of star systems bound together by gravitational force

星系, 银河系
to send an object, such as a satellite, missile, etc., into space

发射, 投放
to move around a star, planet, or a large object in space

围绕, 绕行
a natural body in space that moves around the earth or other planets

卫星, 人造卫星
the sun and the group of planets orbiting around it, including the earth

太阳系, 太阳系的行星
a vehicle designed to travel in space

宇宙飞船, 航天器
to travel over a long distance by sea or in space

航行, 远航
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
(physics) the universal force of attraction between any pair of objects with mass

重力, 引力
relating to the moon

月亮的, 与月亮有关的
a piece of rock coming from outer space that passes through the Earth's atmosphere, producing light

流星, 陨石
the action of circular movement around a fixed point

旋转, 轮换
an imaginary line in the middle of an object around which the object revolves

轴心, 轴线
having or seeming to have no or little weight, caused by the absence of gravity

无重的, 失重的
an operation carried out in space

任务, 使命
a rocket that gives a spacecraft or missile the extra power it needs to leave the Earth's atmosphere

助推器, 火箭助推器
the act of counting numbers backwards to zero before the launch of a missile or spacecraft

倒计时, 倒数
(of the moon) to gradually decrease in its visible illuminated surface as it progresses from full to new moon

减弱, 衰退
