Astronomy

Yellow, white or maybe even green—the sun’s hue depends on how you see it

August gets not only a second full moon but a rare super blue moon

Scientists debate what the future of the cosmos looks like and whether space will ever stop getting bigger and bigger

If you want to make it through the trials and tribulations of Mercury in retrograde, it’s easy: don’t do anything. You’ll be fine

Although Arecibo Observatory is slated to become an education center, astronomers hope research might one day return to the site

A new view of a record-shattering distant star shows it to be twice as hot as our sun and likely accompanied by a stellar companion

All you need to see one of the year’s best meteor showers is a clear, dark sky—and patience

Marvel for a moment at the Milky Way’s night-sky spectacle—and the scientific revolutions it has sparked

The European Space Agency's ambitious Euclid space telescope is on its way to decoding the secrets of dark matter and dark energy

An artist, a programmer and a scientist have created a simulation of extraterrestrial communication to test Earthlings’ ability to understand it

The “magnitude scale” for measuring stellar brightness also reveals the limits of naked-eye stargazing

Experts weigh in on the most shocking, paradigm-shifting and delightful findings in the history of physics