Galaxies and Cosmology
完成条件
按索引浏览词汇表
特殊 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 全部
E
Elliptical GalaxyA rounded galaxy made mostly of older stars with little gas or dust. | |
Expanding UniverseThe idea that the distances between most galaxies increase over time because space itself is expanding. | |
Expansion of the UniverseThe increase in distance between most galaxies as space itself expands. | |