Inner planets are the planets that are closer to the sun they are Mercury, Venus, Earth, and Mars they are hot because they are close to the sun.
The outer planets are the planets
farther from the sun they are jupiter,
saturn, uranus, and neptune they are cold because they are farther.
Black holes are actually planets
that have a really strong gravitationl
field that pulls object toward it and
when they fit it they are destroyed.