"55 Cancri e" was discovered in 2011, and has since been extensively studied by NASA researchers and others. To learn more about "55 Cancri e," click here. Report a correction or typo.

55 Cancri e is a super-Earth — about twice our planet's size — that zooms around its star in 18 days. It has a surface temperature of nearly 4,900 degrees Fahrenheit (2,700 degrees Celsius).

Astronomers today have figured out that 55 Cancri e, a planet that's double Earth's size, is largely made of diamonds. Pretty awesome news for gem hunters, but first we need to figure out how to ...

55 Cancri e is the densest and most solid planet ever found; It has a surface temperature close to 2,700C; A year there last just 18 hours; The discovery of an ‘exotic super-Earth’ that is as ...

For nearly twenty years, scientists have tracked puzzling signals from a massive planet known as '55 Cancri e.' The fiery 'hell planet' — a so-called super-Earth nearly 40 light years away ...

Researchers using NASA's Spitzer Space Telescope found that temperatures on 55 Cancri e — a planet eight times more massive than Earth that lies 40 light-years away — swung between about 1,832 ...