One thing about 3I/ATLAS is for certain: It's definitely not from Earth's solar system. But what exactly is the intriguing interstellar object discovered speeding through our cosmic neighborhood? Most ...
In 1995, a pair of scientists discovered a planet outside our solar system orbiting a solar-type star. Since that finding—which won the scientists a portion of the 2019 Nobel Prize in ...
Artist’s impression of the interstellar object 3I/ATLAS approaching the inner solar system. Scientists debate whether its unusual trajectory and composition suggest an artificial origin. Harvard ...
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