The GRACE Mission launched in 2002 and gave us 13 years of data on Earth's gravitational field and on the global water cycle. Its successor, GRACE Follow-On, was launched in 2018. This mission is making very reliable and precise measurements with a laser interferometer in space. This data is more important than ever to help monitor and understand climate change. The laser interferometer is a cooperation between NASA and German partners, with the German contribution led by the Albert Einstein Institute in Hannover. LISA, the planned observatory in space, will make use of the proven laser technology onboard GRACE Follow-On to measure gravitational waves from the entire Universe.

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