Mars spacecraft observed this interstellar comet — and no, it's not an alien spaceship

An alien comet passing through our solar system made its closest approach to Mars recently, and two European robotic ...
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'Most pristine' star ever seen discovered at the Milky Way's edge — and could be a direct descendant of the universe's first stars

Astronomers have discovered a surprisingly "pristine" red giant with the lowest concentration of heavy elements ever seen in a star. It is likely a direct descendant of one of the universe's first ...

Mars orbiters get look at interstellar 3I/ATLAS. What they found, what's next

The interstellar comet 3I/ATLAS may be out of view of Earth, but orbiters on Mars were able to recently get a look at it.
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'The most significant JWST finding to date': James Webb spots — then loses — a giant planet orbiting in the habitable zone of our closest sun-like star

There might be a huge planet lurking near one of the closest stars to Earth. NASA's James Webb Space Telescope (JWST) has imaged a possible planet near Alpha Centauri A, a sun-like star that forms ...