mercury - the planet that is nearest the sun and has a diameter of about 3000 miles (4700 kilometers), galaxy - any one of the very large groups of stars that make up the universe, black hole - a heavenly body with such strong gravity that light cannot escape it and that is thought to be caused by the collapse of a massive star, meteor - one of the small pieces of matter in the solar system that enter the earth's atmosphere where friction may cause them to glow and form a streak of light, moon - a smaller body that revolves around a planet, earth - the planet that is thirds in distance from the sun. The planet that we live on., eclipse - When one celestial body blocks light from reaching another by moving between it and its light source., observatory - A building equipped with materials to make astronomical observations., rocket - A vehicle designed to carry people into space., sun - The star that objects in our solar system orbit., telescope - An instrument that allows us to see into space.,

The space vocabulary (3) practicing the words

由
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？