The Gaia spacecraft stopped collecting data this January after about 11 years and more than three trillion observations. Senior space and physics editor Lee Billings joins host Rachel Feltman to review Gaia’s Milky Way–mapping mission and the tidal streams, black holes and asteroids the spacecraft identified. 

Recommended reading:

New Maps of Milky Way Are Biggest and Best Yet https://www.scientificamerican.com/article/gaias-multi-billion-star-map-of-the-milky-way-keeps-getting-better/ 

Astronomers Discover Milky Way’s ‘Sleeping Giant’ Black Hole Shockingly Close to Earth https://www.scientificamerican.com/article/milky-way-sleeping-giant-black-hole-shockingly-close-to-earth/ 

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Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper, Madison Goldberg, Naeem Amarsy and Jeff DelViscio. This episode was hosted by Rachel Feltman with guest Lee Billings. Our show is edited by Madison Goldberg with fact-checking by Shayna Posses and Aaron Shattuck. The theme music was composed by Dominic Smith.

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