Astronomer Gianluca Masi of the Virtual Telescope Project captured breathtaking imagery of solar system comet C/2025 K1 ...

3I/ATLAS is only the third known interstellar visitor, hence the prefix “3I.” The second known interstellar body, Comet 2I/Borisov, was discovered by the Russian astronomer Gennady Borisov in August ...

Nemesis theory suggests a hidden brown dwarf companion star triggers mass extinctions every 26 million years, but advanced ...

Long ago, when humans were only just beginning to emerge, Earth might have been pounded by comets, an event possibly triggered by a passing star. This star was nowhere near our planet, and in fact, ...

Nearly a century after Pluto’s discovery, astronomers are still hunting for mysterious planets beyond Neptune - including a ...