Visit the European Organization for Nuclear Research, known as CERN, which studies what the universe is made of and how the universe works.
Explore the history, people, and landscape of this research facility and the scientific and cultural ideas that emerge.
Join us as we visit the Hubble Space Telescope, and see what's happening at Mission Control.
Visit Las Cuevas Research Station in Belize and the Natural History Museum in London to learn about the study of biodiversity.
The untold stories behind scientific discovery.
Explore stories, dispatches, photos, and articles, as well as archived webcasts of total and annular solar eclipses and transits.
Far north in the night sky, a faint glow appears on the horizon. Green and red flames of light stretch across the sky.
Map sunspots and build an apparatus for safe sunspot viewing!
See the tiny disk of Mercury slowly travel across the face of the sun in this rare event.
Learn about the transit of Venus - what it is, what you'll see, and why it's important. View the rarest eclipse of them all - the Transit of Venus.
Explore Saturn, its rings and moons, and see the latest images.
Explore our 2000 guide to the solar max, the period in the solar cycle during which the number of sunspots is greatest.
Your guide to the Northern and Southern Lights (also in 'Observatory')
Use live data to check the weather in space, and learn how it can affect us here on earth.
Visit the Outdoor Exploratorium at Fort Mason to explore the science behind wind, waves, and more.
Couldn't get to the Panama Pacific International Exposition in 1915? Go now in 3-D!
ExploratoriumPier 15, San Francisco, CA 94111