带内行星的带就是处于火星和木星之间的小行星带
一种解释是HIP 13044在红巨星阶段吞噬了它的一些带内行星，这可能使它自转得更快。
One explanation is that HIP 13044 swallowed its inner planets during the red giant phase, which would make the star spin more quickly.
最近，科学家在主小行星带中也发现了一些彗星——这些主带彗星可能是类地内行星上水的关键来源。
Recently, scientist have also discovered comets in the main asteroid belt -these main-belt comets might be a key source of water for the inner terrestrial planets.
应用推荐