The barred spiral galaxy NGC 6872 has ranked among the biggest stellar systems for decades. Now a team of astronomers has crowned it the largest-known spiral, based on archival data from NASA's Galaxy Evolution Explorer (GALEX) mission.
The sole secondary mirror and a third primary mirror segment that will fly aboard NASA's James Webb Space Telescope arrived on Nov. 5, 2012. A video of the mirrors arriving was released today that shows the arrival of both mirror segments and movement into a giant clean room.
A comprehensive study of hundreds of galaxies observed by the Keck telescopes in Hawaii and NASA's Hubble Space Telescope has revealed an unexpected pattern of change that extends back 8 billion years, or more than half the age of the universe.
NASA's special "Webb-cam" now has "double vision," because there are two video cameras now focusing on what's happening with the very first completed instrument that will fly onboard the James Webb Space Telescope.
The first of four instruments to fly aboard NASA's James Webb Space Telescope has been delivered to NASA. The Mid-Infrared Instrument (MIRI) will allow scientists to study cold and distant objects in greater detail than ever before.