学术雅思（5 级及以下） - 天文学

a spacecraft with the purpose of cricling around a celectial obejct without landing on it

轨道飞行器

the study of the movements of stars and planets that are thought to affect people and the world

占星术

an object sent into space to travel around the earth and send or receive information

卫星

all that exists in the physical world, such as space, planets, galaxies, etc.

宇宙

a large number of star systems bound together by gravitational force

星系

(astronomy) a shining point found in large numbers in the night sky

星星

a huge round object that moves in an orbit, around the sun or any other star

行星

the large, bright star in the sky that shines during the day and gives us light and heat

太阳

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

太阳系

the path an object in the space follows to move around a planet, star, etc.

轨道

a vehicle designed to travel in space

宇宙飞船

clothing used by astronauts while traveling in space

宇航服

a means of transportation that frequently travels between two places

穿梭巴士

a spacecraft that moves up by the force of the gases produced when the fuel burns

火箭

the universe, particularly when it is thought of as a systematic whole

宇宙

a US government agency responsible for space travel and the study of space

NASA，国家航空航天局。

the circular object going round the earth, visible mostly at night

月亮

a piece of equipment by which the far objects, particularly those in space, are made clearly visible

望远镜

someone who is trained to travel and work in space

宇航员

a place in the space with such high gravity that pulls in everything, even light

黑洞

the distance that light travels in a year

光年

a pale band of light seen in the sky at night that contains the solar system and billions of other stars

银河

the different types of gases that surround the earth or other planets

大气

the explosion that, according to most scientists, caused the existence of the universe

大爆炸