NASA Set to Deliver Precious Asteroid Samples to Earth

NASA Set to Deliver Precious Asteroid Samples to Earth

 

After an extensive, triumphant, and captivating odyssey, NASA's OSIRIS-REx spacecraft is on the cusp of delivering its precious cargo to Earth.

On September 24, the mission is scheduled to release its collection canister before embarking on another space-bound endeavor.

Contained within this canister are samples of dust and debris from Bennu, a carbon-rich asteroid believed to have originated during the early stages of the Solar System. Remarkably, Bennu has remained relatively unaltered over the course of its 4.5 billion-year journey.

OSIRIS-REx carries approximately 250 grams (8.8 ounces) of invaluable Bennu material in its collection canister, which will be released within a designated 59-kilometer by 15-kilometer ellipse inside a United States Department of Defense testing and training zone in the Utah desert.

NASA's scientists project that the capsule will enter Earth's atmosphere at 14.41 UTC (10.41 AM EDT) and make contact with the surface roughly 13 minutes later.

The entire process will be broadcasted live starting at 10 AM EDT, with a news conference scheduled for 11 AM. This livestream will be accessible on NASA Live, NASA TV, and the NASA app.

The significance of the cargo drop-off cannot be overstated. This delivery constitutes the largest collection of asteroid material ever returned to Earth, although it marks only the third such endeavor. Japan previously successfully retrieved samples from the asteroids Itokawa (2010) and Ryugu (2020).

Bennu is particularly fascinating due to its classification as a B-type asteroid, suggesting the presence of volatile elements alongside its high carbon content. Essentially, it serves as a time capsule from the early Solar System, holding answers to questions about the delivery of crucial components like water and ingredients for life to Earth via asteroids and meteors.

Jason Dworkin, astrochemist and OSIRIS-REx project scientist at NASA Goddard, explains, "There are two things pervasive on Earth: water and biology. Both can severely alter meteorites when they land on the ground and muddle the story told by the sample's chemistry and mineralogy. A pristine sample could provide insights into the development of the Solar System."

OSIRIS-REx's mission has been executed with precision. The spacecraft embarked on its journey from Earth in September 2016, traveling for slightly over two years to reach Bennu, which has an orbit that brings it close to Earth approximately every 6 years. In December 2018, OSIRIS-REx settled into orbit around Bennu and spent the subsequent two years closely studying the asteroid before conducting its sample collection missions.

It initiated its return journey to Earth in May 2021, and NASA's scientists have been meticulously preparing for its homecoming ever since. Once the capsule is retrieved, it will be immediately transferred to a portable clean room at the site to minimize potential Earth contamination.

Furthermore, scientists will take samples from the ground and air surrounding the capsule's landing site. These samples will be compared to the capsule's contents after analysis to identify any local contaminants. The results of this initial analysis are expected by October 11, which is not too long of a wait considering the profound questions that a cup of stardust may answer.

Dante Lauretta, the principal investigator of OSIRIS-REx, emphasized the mission's significance back in 2020, stating, "This is all about understanding our origins, addressing some of the most fundamental questions that we ask ourselves as human beings: Where did we come from? And are we alone in the Universe?"

Additionally, for philatelists, there's exciting news on the horizon: a special commemorative postage stamp is in the works to mark this historic event.