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Today we’re watching a double payload on the SpaceX Falcon9 rocket launching out of Vandenberg Space Launch Complex 4E in California.

Slated for a 3:47pm EST/12:47pm PST take off the rocket is carrying two Gravity Recovery and Climate Experiment Follow-On mission (GRACE-FO) spacecraft and five Iridium NEXT communications satellites.

The NASA GRACE-FO spacecraft will be refining the use of lasers in space to measure the Earth and changes in its surface and water levels, essentially monitoring climate change.

Photo Credits: iStockphoto, 1971yes/Getty Images, Thinkstock, STS-117 Shuttle Crew/NASA, NASA