K2-18b, which has eight times the mass of Earth, just might be covered with a massive ocean and blanketed by an atmosphere ...

A surprisingly well-formed spiral galaxy has been spotted just a billion years after the Big Bang, challenging long-held ...

A distant flicker of light from a star can reveal more than you might expect. In fact, a brief, subtle brightening in the sky ...

This photo of M16 is the latest redux image published to mark the 35th anniversary of the Hubble Space Telescope, which ...

Thirty-five years ago, the Hubble Space Telescope was launched into orbit. It's been sending back galactic data and images ...

NASA’s Nancy Grace Roman Space Telescope is gearing up to unlock the deepest secrets of the universe with three ...

Like how the Earth keeps the Moon bound on a gravitational tether, our nearest galactic neighbor, the Andromeda galaxy (M31), ...