Published on: 
Sep 22, 2021

We Asked a NASA Scientist – Does NASA Know About All the Asteroids?

Does NASA know about ALL the asteroids? We know about the vast majority of larger ones and none of those pose a threat, but space is big, so we're always on the lookout. NASA asteroid expert Dr. Amy Mainzer explains. Learn more: nasa.gov/planetarydefense Producer: Scott Bednar
Producer/Editor: Jessica Wilde

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