Subscribe Now! National Geographic Magazine $15
Visit our Online Shops

Sign up for free

Newsletters

Once a month
get new photos
and expert tips.

Comet Impacts on Jupiter

Photo: Dark spots on Jupiter
Fragments of comet P/Shoemaker-Levy 9 struck Jupiter in July 1994, leaving the impacts visible in this ultraviolet image. The spots appear dark because of the large quantities of dust, which absorbs sunlight, being deposited in the planet's stratosphere.
Photograph courtesy Hubble Space Telescope Comet Team

Space Topics

SPECIAL ADVERTISING SECTION

Photo: 2009 Winner

Photo Contest

Find out who takes home the Grand Prize!

Photo: Glass of water

Take Quiz

Test your water knowledge.

Natural Disasters

Photo: A tornado

Get the science behind avalanches, tsunamis, and more.

Support Conservation

Photo: Two penguins

Help conserve the world's natural resources.