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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
