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An animation showing the new mini-moon's orbit. Gif: NASA/JPL-Caltech

Earth has captured a new mini-moon that will orbit our planet for a few months before heading back out on its cosmic journey through the solar system.

The big picture: Scientists think our planet likely has some kind of "mini-moon" in orbit at any given time.

Details: This mini-moon likely isn't an asteroid or any kind of natural detritus. NASA scientists think the mini-moon is actually the spent upper stage of a rocket that boosted the failed Surveyor 2 toward the Moon in 1966.

  • The object — named 2020 SO — entered into the part of space where Earth's gravity is dominant on Nov. 8 and is expected to stay there until it heads out to a new orbit around the Sun in March 2021.
  • Scientists figured out that the mini-moon is likely a rocket body by observing it and piecing together its past orbits.
  • "One of the possible paths for 2020 SO brought the object very close to Earth and the Moon in late September 1966," NASA's Paul Chodas said in a statement. "It was like a eureka moment when a quick check of launch dates for lunar missions showed a match with the Surveyor 2 mission."

Between the lines: Earth's adoption of this mini-moon illustrates how profoundly humanity has changed the space environment.

  • Even objects like this one from the earliest days of NASA are still floating around as space junk, possibly threatening operational satellites and spacecraft today.
  • NASA estimates there are millions of pieces of space junk in orbit today, and it's just getting more crowded up there as new satellites launch each month.

Go deeper

Miriam Kramer, author of Space
Nov 24, 2020 - Science

Inside a mission to send private astronauts to the space station

Photo Illustration: Eniola Odetunde/Axios. Photo: Gregg Newton/Getty Images

If all goes according to plan, in about a year, former NASA astronaut Michael López-Alegría will board a SpaceX capsule and command a flight to orbit with three other private astronauts.

The big picture: The mission — flown by the company Axiom Space — will mark a major test of NASA's plans to open up commercial access to the space station in the name of creating a thriving private market in low-Earth orbit.

Tony Hsieh, longtime Zappos CEO, dies at 46

Tony Hsieh. Photo: FilmMagic/FilmMagic

Tony Hsieh, the longtime ex-chief executive of Zappos, died on Friday after being injured in a house fire, his lawyer told the Las Vegas Review-Journal. He was 46.

The big picture: Hsieh was known for his unique approach to management, and following the 2008 recession his ongoing investment and efforts to revitalize the downtown Las Vegas area.

Dan Primack, author of Pro Rata
5 hours ago - Economy & Business

The unicorn stampede is coming

Illustration: Annelise Capossela/Axios

Airbnb and DoorDash plan to go public in the next few weeks, capping off a very busy year for IPOs.

What's next: You ain't seen nothing yet.