LHS 1140 b
Distance: 40 Lightyears
Star: LHS 1140
Constellation: Cetus
A lot of people love the LHS 1140 b planet for understandable reasons. There is a ton of promise here, but with that promise, we also have some issues. Discovered on April 20, 2017, during the MEarth Project, LHS 1140 b clearly showed signs that it could be among the planets that could house human life one day.
Of course, being only 40 lightyears away, it is clearly in a prime location. It rotates around a dwarf star, which could be why it was estimated to have an average -46 degrees Fahrenheit temperature. LHS 1140 b’s iron-nickel core even takes up 75% of its landmass. Yet estimates also found that it contains 4% water. This made some astronomers assume that it could be a water world. LHS 1140 b is massive compared to Earth, which makes many feel that it has a greenhouse effect already in play. Thus, the temp of the planet is likely warmer than earlier estimates found. On top of that, the host star is inactive regarding atmospheric erosion, which also could allow the planet to warm up.