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Whether you want to call it a “Blood Moon”, “Harvest Moon” or a “Supermoon” ...the rare total Lunar Eclipse happening on September 27th hasn't happened in 32 years, and won't happen again for another 18 years. If you are on the west coast the eclipse will begin at 7:11 p.m. PDT Sunday evening and will last one hour and 12 minutes.

The drinking water provided for San Francisco and many nearby communities is among the purest in the world. Located high in the Sierras, more than 200 miles away, Hetch Hetchy reservoir holds most of this water which is fed by springtime snowmelt via the Tuolumne River. The system for delivering that water is almost entirely gravity fed, requiring almost no fossil fuel consumption to move water from the mountains to the tap. Take an exclusive tour with the San Francisco Public Utilities Commission (SFPUC) as they lead us through this unique system and address the current drought and how to conserve water.

Robots have gone where no one has gone before and sent back photographs of things never before seen. Witness robot-captured photos of hellaciously hot venus, cryogenically cold Titan, and many places in between. Join Exploratorium Senior Scientist Paul Doherty to a brief exploration of the images that have captured our imaginations.

5 years and 5 servicing missions have provided scientists and the public with unprecedented views of our universe. From objects as close as our solar system to the furthest reaches of the Universe, we’ll look at some of these images and discuss what it took to get them.

Join Dr. Jay Daniel, Director of Engineering at L-3 Integrated Optical Systems Tinsley, to explore beryllium’s central role in the future James Webb Space Telescope.

Join us for a live webcast with senior scientist Paul Doherty to discuss breaking news about the Rosetta Mission! The European Space Agency’s Rosetta mission deployed its lander, Philae, to the surface of Comet 67P/Churyumov–Gerasimenko on November 12. 2014. Philae’s landing site, currently known as Site J, is located on the smaller of the comet’s two ‘lobes’, with a backup site on the larger lobe. The sites were selected just six weeks after Rosetta arrived at the comet on August 6, following its 10-year journey through the Solar System.

The race to find Philae's landing site could only begin once Rosetta arrived at comet, 67P/Churyumov–Gerasimenko on August 6th, when the comet was seen close-up for the first time. Since then, the spacecraft has moved to within 30 km of the comet, affording more detailed scientific measurements of the candidate sites. In parallel, the operations and flight dynamics teams have been exploring options for delivering the lander to all five candidate landing sites. Join Exploratorium Senior Scientist, Isabel Hawkins for a live webcast detailing the amazing stages of the Rosetta Mission!

Join us as Rosetta moves ever closer to Comet 67P/Churyumov-Gerasimenko’s nucleus to map potential sites for a November landing.

The most difficult phase of the Rosetta mission is the final rendezvous with the fast-moving comet. Learn what steps the ESA scientists and engineers are taking to ensure a successful landing for November 2014.

Join Exploratorium staff scientist Ron Hipschman as we visit Dan Werthimer, Director of the SETI Research Center at UC Berkeley. SETI conducts experiments searching for electromagnetic signatures of intelligent extraterrestrial civilizations, spanning wavelengths from radio to visible light, over ten orders of magnitude in characteristic time scale.