The vernal equinox marks the changing of seasons. For the Northern Hemisphere, winter recedes into spring. In the Southern ...

The vernal equinox marks the changing of seasons. For the Northern Hemisphere, winter recedes into spring. In the Southern ...

Astronomers measure star brightness using the magnitude scale. All the really bright stars we see are magnitude 1 or brighter ...

Stargazers will be treated to a dazzling six-planet "alignment" this January.

Things to do on the Galápagos Islands include spending time with local wildlife and hiking to the rim of one of the world's ...

The colorful northern lights may reveal themselves to a wide swath of Americans Friday night due to an impending solar storm ...

Aurora chasers are on high alert for minor geomagnetic storm conditions from Jan. 24 through to Jan. 25. Northern lights ...