10 THINGS March 19

This Week: Exoplanets 101

Let the planet-hunting begin. NASA’s TESS spacecraft is being prepared for an April launch. Below, 10 Things to know about the many, many unknown planets out there awaiting our discovery.

Image of the Week

A Mess of Messier Objects

Check out the latest additions to Hubble's catalog of Messier objects.

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Featured Video

Descent to Titan


A scientist's interpretation and visualization of the January 2005 descent to Saturn's giant moon Titan by the European Space Agency’s Huygens probe.
4:33 video