classification of galaxies造句

例句与造句

1. The Magellanic spiral classification was introduced by Gerard de Vaucouleurs, along with Magellanic irregular ( Im ), when he revamped the Hubble classification of galaxies.
2. Among his contributions are the observational proof that many nebulous objects are actually galaxies beyond our own Milky Way galaxy, the classification of galaxies according to the Hubble sequence, and the development of Hubble's law relating a galaxy's observed red shift to its distance away.
3. It's difficult to find classification of galaxies in a sentence. 用classification of galaxies造句挺难的