Video: DSCOVR prepared for launch

A stack of four satellites, each one carrying 25 science sensors and together will perfect the art of formation flying, are being packaged inside an Atlas 5 rocket nose cone in preparation for mounting atop the booster next week.

The SpaceX Falcon 9 launch countdown with the Deep Space Climate Observatory is halted due to a problem at T-minus 2 minutes, 26 seconds.

A new space weather observatory launched in February has completed a four-month journey to an operating post a million miles from Earth, NOAA announced Monday.