someone who is trained to travel and work in space
宇航员, 航天员
the layer of gases surrounding a planet, held in place by gravity
大气, 气体层
a large structure used as a long-term base for people to stay in space and conduct research
空间站, 太空基地
the natural light coming from the sun
阳光, 日光
the light coming from the moon
月光, 月亮的光
any of the rocky bodies orbiting the sun, ranging greatly in diameter, also found in large numbers between Jupiter and Mars
小行星, 岩石天体
a scientist who studies or observes planets, stars, and other happenings in the universe
天文学家
a branch of science that studies space, planets, etc.
天文学, 星空科学
a large number of star systems bound together by gravitational force
星系
to send an object, such as a satellite, missile, etc., into space
发射, 启动
to move around a star, planet, or a large object in space
绕轨道运行, 环绕
a propulsion device with its own fuel that produces thrust through reaction forces
火箭, 运载火箭
a natural body in space that moves around the earth or other planets
卫星, 月亮
the sun and the group of planets orbiting around it, including the earth
太阳系, 太阳系
a vehicle designed to travel in space
航天器, 宇宙飞船
to travel over a long distance by sea or in space
航行, 航海
the earth's atmosphere and the space beyond it
航空航天, 大气层和太空
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
relating to the moon
月亮的, 阴历的
a piece of rock coming from outer space that passes through the Earth's atmosphere, producing light
流星, 陨石
a single complete circular movement around an axis or along an orbit
旋转, 转动
the central point or line around which an object turns
轴, 旋转轴
having or seeming to have no or little weight, caused by the absence of gravity
失重的, 处于无重力状态
an operation carried out in space
任务
a rocket that gives a spacecraft or missile the extra power it needs to leave the Earth's atmosphere
助推器, 加速器
the act of counting numbers backwards to zero before the launch of a missile or spacecraft
倒计时, 倒数
an unmanned spacecraft or device sent to gather information from space and transmit it back
探测器, 太空探测器
