天文学单词英文怎么说

天文学是研究天体和宇宙的科学。许多天文学术语都是由希腊语或拉丁语演变而来的，因此在英语中也有许多希腊字母缩写。

例如：

Astronomy：天文学
Cosmos：宇宙
Nebula：星云
Solar system：太阳系
Planet：行星
Star：恒星
Comet：彗星
Meteor：流星

示例句子：

Astronomy is the study of the universe and celestial bodies.
The cosmos is a vast and complex place.
The Orion Nebula is a beautiful cloud of gas and dust located in the constellation Orion.
Our solar system consists of the sun and all the objects that orbit around it.
The planets in our solar system include Earth, Mars, and Jupiter.
The sun is a star located at the center of our solar system.
Halley's Comet is a periodic comet that can be seen from Earth about once every 76 years.
A meteor is a small piece of rock or dust that falls from space and burns up in the Earth's atmosphere.