The European Southern Observatory (ESO) has released a stunning 80 million-pixel image of the star cluster RCW 38, as captured by ESO's Visible and Infrared Survey Telescope for Astronomy (VISTA), ...

At the surface, Mars is a desolate, barren world with a rocky landscape, massive dust storms and extreme temperature swings. However, a rover recently captured a splash of color in the sky as rare ...

"I'll always remember the first time I saw those iridescent clouds and was sure at first it was some color artifact." ...

From supermoons to an eclipse and star parties at national parks, these captivating celestial phenomena will get Americans ...