Scientists say 3I/Atlas came closest to Mars in October. Its path this month put it in the path of the warm rays of our sun, where a tail became more visible. The 3.5-mile solar object is traveling at 137,000 miles per hour, NASA said.

Astronomers study 3I/Atlas as its tail rapidly expands and a strange cosmic radio signal reaches Earth, sparking new debate over its interstellar nature.

A mysterious visitor from beyond our solar system is making a rare appearance: Comet 3i/ATLAS is an interstellar comet, traveling at breakneck speed and carrying clues from a distant star system billions of years old.

Blue Origin's New Glenn rocket was scheduled for launch on Sunday (Nov. 9) but it has been delayed until Wednesday (Nov. 12) due to poor weather conditions. The launch will be the first big test for the rocket’s first NASA mission, and a statement of intent for the company’s founder Jeff Bezos against competitor SpaceX.

The object 3I/ATLAS made it past the Sun in one piece, which led Harvard astronomer to double down on his earlier argument about the object's nature.

Viral video of the 3I/ATLAS interstellar comet has reignited alien theories online, but scientists confirm the object’s behavior and signals ar natural.

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Space Solar revelations as Comet 3I/ATLAS rapidly brightens, a tiny tyrannosaur prompts T. rex rethink, and the unexpected perks of cussing out your chatbot Space Astronomers close in on comet 3I/ATLAS's origins,