Jupiter is the giant among the planets in the Solar System. All the others
could fit into it with room to spare, and it could swallow more than 1,000
bodies the size of Earth. Made up mainly of hydrogen, Jupiter is a gassy
planet with a stormy atmosphere full of clouds......（以下略）
略译：木星在太阳系中的行星里是个巨大的星球。 它可以容纳其他星球还能剩下空间。
请教这边的fit into是什么意思呢？
谢谢回答。