Tonight's Sky
Sun
Sun
Moon
Moon
Mercury
Mercury
Venus
Venus
Mars
Mars
Jupiter
Jupiter
Saturn
Saturn

Tonight's Sky — Change location

OR

Searching...

Tonight's Sky — Select location

Tonight's Sky — Enter coordinates

° '
° '
SpitzerRockyPlanet_SliderLarge

Closest rocky exoplanet

NASA’s Spitzer Space Telescope confirms the discovery of the nearest rocky planet a mere 21 light-years away

Learn more »

Take the Universe With You!

First exo-aurora

Powerful aurora found beyond our solar system

Learn more »

P23641_ASY_Norway_564x453

Join Astronomy's Aurora Adventure

Experience a once-in-a-lifetime northern lights tour with Astronomy magazine and TravelQuest International

See the brochure »

Year of Pluto

Revelations of a distant world

Explore the latest »

Pillars of destruction

Cosmic winds erode gas and dust, stopping star formation.

Learn more »

P25368_563x462

Sign Up for Astronomy's five-part Observing Essentials email series!

Get timely coverage of the heavens above

Pluto's atmosphere

New Horizons sees haze around the backlit world

Learn more »

BaliRotator

Indonesian Islands Eclipse

Explore Bali and witness a total solar eclipse in March 2016 with Astronomy magazine and TravelQuest International

View the brochure »

Hubble at 25

How the space telescope changed the cosmos

Learn more »

Ancient mega-Earth

Kepler finds a super-Earth around a Sun-like star

Learn more »

564x453_SoA_RB

Exclusive podcast series

Editor David J. Eicher conducts extensive interviews with the world's top astrophysicists, planetary scientists, and cosmologists

Listen now »

Even more mountains

Pluto's heart is home to a second range of ice mountains

Learn more »

Uwingu Mars

Name a crater ... make an impact!

Learn more »

Closest rocky exoplanet

NASA’s Spitzer Space Telescope confirms the discovery of the nearest rocky planet a mere 21 light-years away

Learn more »

PICTURE OF THE DAYsee all »

NGC 3521

Spiral galaxy NGC 3521 floats through space in the constellation Leo the Lion. Although classified as spiral, it does have traces of a bar structure. This beauty lies some 26 million light-years away. (16-inch RC Optical Systems Ritchey-Chrétien telescope, Apogee Alta U9 CCD camera, LRGB image with exposures of 15, 10, 10, and 10 hours, respectively)
ADVERTISEMENT

FREE EMAIL NEWSLETTER

Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter.

ADVERTISEMENT
ADVERTISEMENT

Loading...