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Astronomy: Web Sources

Silicon Valley Astronomy Lectures

Cornell University's Ask an Astronomer, NASA's Astronomy Photo of the Day

Ask a real life astronomer in Cornell University's astronomy department about astronomy at Ask an astronomer.

See live footage of planets on Astronomy Picture of the Day. Find free use photos of planets like this one by Davide Necchi.


Free mobile apps

SkyView Free

Where will the Sun rise and set today? Is there a Full Moon tonight? Where is the Big Dipper?

This easy to use app helps you find stars, constellations, and satellites. Type the name of the object and then simply follow the arrow until it appears in the camera view. Discover neat facts about each of these objects or point the camera to the sky, tap on what you see and discover really neat things about these sky objects.

Open Access Articles

Public Library of Science publishes seven peer-reviewed open-access journals to accelerate progress in science and medicine.