March 23, 2015 - Revisiting an Old Friend
Revisiting an Old Friend A week after it began operations in 1999, NASA’s Chandra X-ray Observatory pointed at Centaurus A (Cen A for short), a galaxy 12 million light-years away that contains a gargantuan jet blasting out from a central supermassive black hole. The jet, invisible at optical wavelengths, shines brightly in the high-energy X-ray region of the spectrum. Since then, Chandra has made repeat observations of Cen A at different X-ray wavelengths. This color-coded image, the result of nearly nine-and-a-half days of observations accumulated between 1999 and 2012, shows the lowest-energy X-rays that Chandra detects in red, medium-energy X-rays in green, and the highest-energy ones in blue. In addition to the jet, a central dust lane wrapping around the waist of the galaxy is visible.
Image credit: NASA / CXC / U.Birmingham / M.Burke et al
March 23-29, 2015
Holidays - Sky Events - Space History
Aldebaran 0.9° south of Moon
First Qtr Moon 3:43 AM ET