How big are these space rocks?
A photo of a lunar crater, measuring about 600 feet across, captured by NASA's Lunar Reconnaissance Orbiter.
Thankfully, the astronauts weren't in too much danger, according to Bill Cooke, head of NASA's Meteoroid Environment Office at NASA's Marshall Space Flight Center in Alabama."The odds of an astronaut being hit by a millimeter-sized object is like 1 in 1 million per hour per person," Cooke told Live Science.
For impactors smaller than a millimeter, the number cannot be precisely quantified, but Cooke estimates that 11 to 1,100 tons — the mass of about 5.5 cars — of dust collide with the moon per day. For larger rocks, the estimates are clearer.
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Artemis 1 moon rocket gets space station flyover in stunning NASA photoTariq is the Editor-in-Chief of Space.com and joined the team in 2001, first as an intern and staff writer, and later as an editor. He covers human spaceflight, exploration and space science, as well as skywatching and entertainment. He became Space.com's Managing Editor in 2009 and Editor-in-Chief in 2019. Before joining Space.com, Tariq was a staff reporter for The Los Angeles Times covering education and city beats in La Habra, Fullerton and Huntington Beach. He is also an Eagle Scout (yes, he has the Space Exploration merit badge) and went to Space Camp four times as a kid and a fifth time as an adult. He has journalism degrees from the University of Southern California and New York University. To see his latest project, you can follow Tariq on Twitter.
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