Barren planet

Barren planet is a class of planet with hard surface made mainly of bare rocks and virtually.

Habitability and characteristics
The -bearing status on barren planets are fair. Typically barren planets don't contain a lot of surface liquids (such as water), but some of these have abundant liquids underground in s or s where life can thrive in. Most of those planets have relatively thin s.

Abundance
There are an estimated 233 billion barren planets in alone, making it the most abundant surface class of planet other than. This corresponds that 445‰ of all 524 billion terrestrial planets and 284‰ of all 820 billion planets in our galaxy are barren planets. It is one of five out of eight surface classes of planets with abundances of at least 100 billion.

Speculated barren planets
, and  are barren planets in our. There are nearly a hundred speculated barren planets around other stars as of 2015, including two out of three s in orbit around, a around , all three around , and one around.