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Emily Lakdawalla • Sep 10, 2009
Two new blogs to follow: 3D planets and image treasures
Two great new planetary science-themed blogs have just started up, and rather than repost everything they've posted so far (which is what I've really wanted to do), I'll just give a summary and point you over there to read. Having done that, though, I'm sure I still won't be able to keep myself from reposting a bunch of their stuff. They just have too many pretty pictures to share.
The first one is Dr. Schenk's 3D House of Satellites. Paul Schenk is a researcher at Houston's Lunar and Planetary Institute whose specialty (well, one of his specialties) is figuring out the topography of outer solar system moons. He derives 3D information both from stereogrammetry (looking at two pictures of the same spot from different angles, the way humans see in 3D) and from photoclinometry (analyzing the lengths of shadows to determine heights of shadow-casting points). Here's a striking view from his recent entry on Enceladus:
Perspective view of Baghdad sulcus
Baghdad sulcus is one of the "Tiger Stripes" that cross Enceladus' south pole, from which its geysers flow. Paul Schenk processed Cassini images to produce a digital elevation model of this region and create the perspective view of a deformed area between two splays of Baghdad sulcus. The ridges are 80 to 100 meters high.
Paul Schenk / LPI
Perspective view of Elsinore Corona, Miranda
This is a frame from an animation of a flyover of a 3D view of Uranus' moon Miranda, made from a topographic data set developed by Paul Schenk from Voyager 2 images.
NASA / JPL / processing © Ted Stryk, Roane State CC