I/ATLAS might only be the third interstellar object seen in our solar system. But it is not special in the sense that there are 10^{23}, or one hundred sextillion, such objects in the Milky Way alone.
Compelling signs of past Martian life and potential biosignatures on exoplanets have emerged. New planets near Earth were ...
In 2025, astronomers revealed nearby exoplanets, a rare interstellar comet, possible biosignatures on Mars, and an ...
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