1 Picture, 9,000 Megapixels, 84 Million Stars
The center of our galaxy, as seen by the powerful Visible and Infrared Survey Telescope for Astronomy (VISTA) instrument in northern Chile, has been captured in a digital image that represents the largest catalog of the stars there to date, some 84 million of them (10 times more than earlier catalogs). The original image covers 108,500 by 81,500 pixels (just under nine billion pixels or nine gigapixels). If you were to print it out at normal book-level resolution, it would be something like 30 feet wide and 23 feet tall. Really the only way to see it is on a computer.
The image contains both visible and infrared light, which allows astronomers to documents stars normally obstructed by gas clouds. All of the data that went into the image are being contributed to the public domain through the observatory’s archive so that in the months ahead astronomers can pore over them, searching for clues as the formation, evolution, and structure of our galaxy, and looking for stars that might be good candidates for more exoplanet discoveries.