Big reveal

Watch: NASA's new satellite unwraps itself in space, like a little golden gift

The SWOT satellite with its solar arrays extended -- rendering

Santiago Urquijo/Moment/Getty Images

Without water, there’d be no life on Earth — and yet there’s still so much we don’t know about our planet’s waterways.


But a newly-launched spacecraft called the Surface Water and Ocean Topography (SWOT) satellite will soon begin mapping the planet’s oceans, rivers, and lakes in unprecedented detail.