More than a trillion pixels from a million-plus images, combined to create the most detailed map of the universe ever created—one that would require a wall of a half-million HDTVs to properly appreciate. Not bad for something that looks a little like tan carpeting.
What you’re seeing is about one-third of the sky, imaged by the Sloan Digital Sky Survey, which has been assembling images from Apache Point Observatory in New Mexico for more than a dozen years to image the cosmos in unprecedented detail.
It replaces an image that is now over half a century old, created on photographic plates by the Palomar Sky Survey in the 1950s but still used by astronomers today. It contains 10 times as many objects – such as galaxies, stars and nebulae – as the Palomar survey and scientists hope it will be used for decades to come by astronomers hunting for everything from dark matter to planets orbiting other stars. [The Guardian]
On her first true flight as an observatory, NASA’s plane-based infrared telescope (the Stratospheric Observatory for Infrared Astronomy, aka SOFIA) took a close look at Orion and other star clusters overnight on November 30th.
“The early science flight program serves to validate SOFIA‘s capabilities and demonstrate the observatory’s ability to make observations not possible from Earth-based telescopes,” said Bob Meyer, NASA’s SOFIA program manager. “It also marks SOFIA‘s transition from flying testbed to flying observatory, and it gives the international astronomical research community a new, highly versatile platform for studying the universe.” [press release]
SOFIA is a highly modified Boeing 747SP jetliner that now includes a 100-inch German telescope (bigger than the Hubble’s!). These early observations were made with a general-use mid-infrared camera called FORCAST designed by a group at Cornell University.
Since SOFIA cruises at altitudes between 39,000 and 45,000 feet above sea level, it’s above 99 percent of the atmosphere’s water vapor (which normally blocks infrared light from reaching earth). The camera captures images using these infrared rays, producing detailed pictures that couldn’t be taken from earth.