Discovered in the 18th century, the Helix Nebula, located about 700 light-years away in the constellation Aquarius, belongs ...

This color-composite image of the Helix Nebula was created from images obtained ... at the La Silla observatory in Chile. The blue-green glow in the center of the Helix comes from oxygen atoms ...

After tracking a puzzling X-ray signal from a dying star for decades, astronomers may have finally explained its source: The old star might have destroyed a nearby planet. Dating back to 1980, X ...

The Orion Nebula, 1,344 light-years away, shines in vibrant colors and serves as a stellar nursery for new stars. The Helix Nebula, 650 light-years away, resembles a cosmic eye formed by a dying ...

The rapidly spinning neutron star embedded in the center of the nebula is the dynamo powering ... nitrogen (represented by red), hydrogen (green), and doubly ionized oxygen (blue).