The Snow Globe Nebula is a planetary nebula 1,500 light-years away. Its transparent ring resembles a snow globe with starlight "snowflakes". It's formed from a dying star shedding its outer layers. It ...

Now in its 17th year, the Astronomy Photographer of the Year competition is open for submissions. The competition is organized by the Royal Observatory Greenwich in London, England, in association ...

Through a telescope, Neptune displays a 2.3″-diameter disk with a subtle blue-gray color. The Red Planet rises as darkness falls in October, dominating the eastern sky all evening. The best telescopic ...

Islamicate celestial globes made as early as the eleventh century are found in museums and private collections today. There are also references in classical Greek and Roman literature to carlier ...