a creature that is believed to exist in other worlds or planets
外星人, 异形
the space outside the earth's atmosphere
外太空, 宇宙空间
all that exists in the physical world, such as space, planets, galaxies, etc.
宇宙
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 place in the space with such high gravity that pulls in everything, even light
黑洞, 黑孔
a large number of star systems bound together by gravitational force
星系
the sun and the group of planets orbiting around it, including the earth
太阳系, 太阳系
the 1st and smallest planet in the solar system which is the closest to the sun
水星
the 2nd planet of the solar system located between Mercury and earth
金星, 金星这个行星
the 4th planet of the solar system located between earth and Jupiter
火星
the 5th and the largest planet of the solar system located between Mars and Saturn
木星是太阳系的第五大行星，也是最大的行星，位于火星和土星之间。
the 6th planet of the solar system located between Jupiter and Uranus, which has rings around it
土星, 土星这个行星
the 7th planet of the solar system with a blue-green color located between Saturn and Neptune
天王星, 天王星这颗行星
the 8th planet of the solar system with a ring of icy particles around it
海王星, 海王星这颗行星
a branch of science that studies space, planets, etc.
天文学, 星空科学
a scientist who studies or observes planets, stars, and other happenings in the universe
天文学家
the act of an aircraft or spacecraft arriving on the ground or a solid surface
着陆
situated on the outside of something else
外部的, 外面的
the path an object in the space follows to move around a planet, star, etc.
轨道, 运行轨道
to move around a star, planet, or a large object in space
绕轨道运行, 环绕
a spacecraft that moves up by the force of the gases produced when the fuel burns
火箭
an object sent into space to travel around the earth and send or receive information
卫星, 航天器
to send an object, such as a satellite, missile, etc., into space
发射, 启动
the process by which an aircraft leaves the ground and starts to fly
起飞
a vehicle designed to travel in space
航天器, 宇宙飞船
someone who travels into space, such as an astronaut
宇航员, 太空人
a kind of spacecraft used by astronauts to explore in space
宇宙飞船, 航天飞机
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
clothing used by astronauts while traveling in space
宇航服, 太空服
a period during which an astronaut moves outside an spacecraft in space, typically to perform repairs or experiments
太空行走, 舱外活动
