Skygazers, mark your calendars because one of the coolest celestial events is coming around again toward the end of February.

A unique characteristic of the candidate planet HD 137010b is its ice-cold temperature.

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Early risers are this week being treated to the sight of a ...

Add Yahoo as a preferred source to see more of our stories on Google. An illustration showing Planet Nine, a hypothetical, undiscovered planet in our solar system. New research now suggests the ...

In theory, a planet may be able to orbit a binary star system in a figure of eight, but it may not be particularly stable, explain our readers ...