The moment an object from another star system appears in survey data, astronomy shifts into sprint mode. Interstellar visitors do not linger, and each one offers a narrow window to study material ...

Comet 3I/ATLAS, the third known interstellar object ever detected passing through our solar system, carries a chemical signature that does not match what astronomers typically see in comets born ...

Learn how ALMA observations revealed unusually high levels of methanol in interstellar comet 3I/ATLAS and what the molecule’s chemistry may reveal about how icy bodies form around other stars.

The interstellar comet 3I/ATLAS was the third object ever discovered in our solar system that originated from another star system. Despite a viral conspiracy theory, NASA officials have repeatedly ...

In late 2025 a mysterious comet flew between the orbits of Earth and Mars and reached a speed of more than 150,000 miles per hour during its closest approach to the sun. The rare interstellar guest ...

Add Yahoo as a preferred source to see more of our stories on Google. An illustration showing Planet Nine, a hypothetical, undiscovered planet in our solar system. New research now suggests the ...

Space scientists have revealed a new image of the mysterious space rock that passed through our solar system. Researchers said the picture shows the interstellar Comet 3I/ATLAS, suggested to be a ...

Illustration comparing the planets of the Solar System and the Sun on the same scale. The planets are shown to scale relative to each other but their distances are not. From left to right the bodies ...

Microscopic crystals extracted from meteorites could help settle a debate about the birth of our patch of the Milky Way.