Last month, mysterious interstellar object 3I/ATLAS came within just 18 million miles of Mars during its unusual trajectory through our solar system. During its approach, NASA’s Mars Reconnaissance ...

Scientists are grappling with a cosmic mystery: why does the Universe behave differently on massive scales compared to our ...

Add Yahoo as a preferred source to see more of our stories on Google. Artist's impression of 'Oumuamua, the first known interstellar object detected passing through our solar system in 2017.

WASHINGTON — NASA released fresh images on Wednesday of the interstellar object called 3I/ATLAS that astronomers have determined is a comet probably even older than our solar system, as space agency ...

NASA unveiled close-up pictures on Wednesday of the interstellar comet that's making a quick one-and-done tour of the solar system. Discovered over the summer, the comet known as 3I/Atlas is only the ...

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