My last tech meeting before a much-needed vacation (which will explain my online absence for the next two weeks) was the "Immersive Space Reception," a party for the all-new digital planetarium at the Chabot Space & Science Center in Oakland, CA.
The planetarium half-dome is the same as it ever was, but they've added six DLP projectors fed by their own computers and new software. The projectors are 1400 x 1048 pixels each; five are used to cover the horizon ring and the sixth fills in the space left at the roof. The effect is seamless and amazing. This planetarium can go anywhere in the universe there's data on, and it can do it at the whim of the planetarium operator. During the demo, senior astronomer Ryan Diduck, and Sky-Skan president Steve Savage (his company made the software), "drove" us from Earth orbit, around our solar system and the galaxy, and to the edge of the known universe. What we didn't see, which Chabot executive director Alex Barnett says they're working on for the next step, is a trip in the other direction: Into biology and atomic structure.
Coincidentally, a few days prior I was experimenting with Celestia, a free universe explorer that runs on a PC (think of it as Google Earth, but pointing in the other direction). On the way to the planetarium, I was wondering: With all the computing and graphics power available on our desktops now, and all the data that you can stream over the Internet, who needs a planetarium? Somebody at the event described it this way: Your PC, the Internet, your books -- think of that, collectively, as your bible of astronomy. The planetarium is the church. It's where you go to be taught, to experience the wonder with others, and to feel the awe of the universe in a setting that you can't duplicate at home. Amen to that.