Organic molecules have been detected in samples collected by Japan’s Hayabusa2 mission from the near-Earth asteroid Ryugu.

As CNN reports, when researchers analyzed the samples, collected from two different locations on the asteroid, they found uracil, one of the building blocks of RNA, as well as vitamin B3, or niacin (a key cofactor for metabolism in living organisms).

The asteroid samples could reveal the origin story of our solar system.

Uracil is a nucleobase or nitrogen-containing compound.

It is one of the five nucleobases in DNA and RNA, the proteins and molecules of which contain genetic information and instructions vital to the cells of living organisms.

A study detailing the findings was published Tuesday in the journal Nature Communications.

Ryugu is a diamond-shaped carbon-rich asteroid that is about 3,000 feet (1 kilometer) across.

Hayabusa2 was the first mission to return to Earth with a sample from the asteroid’s soil.

The Japan Aerospace Exploration Agency mission collected the sample from Ryigu’s surface in February 2019 and then fired a copper “bullet” into the asteroid to create a 33-foot-wide (10-meter) impact crater.

A sample was collected from this crater as well in July 2019. Hayabusa2 then flew by Earth.