The Deep Space Climate Observatory

Source - Space Weather News for Feb.12, 2015: http://spaceweather.com

For years, space weather forecasters have worried about the aging ACE spacecraft, which provides early warnings of CMEs and other solar storms bearing down on Earth. Launched in 1997, ACE could fail at any moment, leaving us blind to incoming storms. On Feb. 11th, NOAA, NASA and the US Air Force launched a replacement--The Deep Space Climate Observatory.

Read all about it on http://spaceweather.com