New findings from the Ryugu asteroid samples indicate that carbonates were forming from water-rock reactions several million years earlier, even closer to the solar system's beginnings.

First Rock From Outside the Solar System Sails Past Earth Astronomers were stunned to see the first known object flung through our cosmic neighborhood from interstellar space.

In a first, scientists have shown that a mysterious object that flew by our sun is not native to our solar system.

Called 3I/ATLAS, the comet is only the third of its kind known to astronomers, and it’s likely been heading our way for billions of years, carrying pristine material from another star system ...

NPR's Ari Shapiro talks with astronomer David Jewitt about what we can learn from the third interstellar object to have entered our solar system, a comet-like object known as 3I/ATLAS.