NASA’s first-ever pristine asteroid sample will come down to Earth on Sunday morning (Sept. 24), and you can watch the historic action live.
That capsule will touch down softly under parachutes at 10:55 a.m. EDT (1455 GMT) at the Department of Defense’s Utah Test and Training Range and Dugway Proving Grounds, about 80 miles (130 kilometers) southwest of Salt Lake City.
You can watch the landing, and the leadup to it, live here at Space.com, courtesy of NASA, or directly via the space agency’s YouTube channel. Coverage will start at 10 a.m. EDT (1400 GMT).
The $1 billion OSIRIS-REx mission — whose name is short for “Origins-Spectral Interpretation-Resource Identification-Security-Regolith Explorer” — launched atop a United Launch Alliance Atlas V rocket in September 2016.
OSIRIS-REx headed for Bennu, a potentially hazardous asteroid that’s about 1,650 feet (500 meters) wide. The probe reached its target in December 2018, setting a new record for smallest body ever orbited by a spacecraft, and investigated the rock over the next 22 months.
Then, in October 2020, OSIRIS-REx swooped down to Bennu’s surface and snagged a heaping helping of dirt and gravel — presumably about 8.8 ounces (250 grams) of the stuff. However, the exact quantity won’t be known until mission team members open the probe’s sample capsule at last.
And that step is just around the corner, for the capsule is coming down on Sunday.
A day or so after touchdown, the Bennu sample will make its way to NASA’s Johnson Space Center (JSC) in Houston, where it will be curated and stored. JSC personnel will oversee the material’s distribution to scientists around the world, who will study it for a variety of purposes.
For example, they’ll look for clues about the solar system’s early days, which may be locked away inside the ancient, primitive asteroid. And scientists think that carbon-rich space rocks like Bennu delivered life’s building blocks to Earth billions of years ago, so some sample studies will focus on the asteroid’s trove of carbon-containing organic molecules.
The OSIRIS-REx spacecraft, by the way, will keep flying after Sunday. NASA has granted an extended mission called OSIRIS-APEX that takes the probe to the potentially hazardous asteroid Apophis. The probe will reach its target in 2029, if all goes according to plan.
Editor’s note: This story was corrected at 4:20 p.m. ET on Sept. 23 to state that OSIRIS-REx launched on an Atlas V rocket, not a SpaceX Falcon 9.
Daisy Hips is a science communicator who brings the wonders of the natural world to readers. Her articles explore breakthroughs in various scientific disciplines, from space exploration to environmental conservation. Daisy is also an advocate for science education and enjoys stargazing in her spare time.