Comets
Astronomers using the Hubble Space Telescope observed comet C/2025 K1 (ATLAS) shortly after it split into four fragments, thanks to a lucky scheduling change. The high-resolution images provide unprecedented detail on the event. Researchers noted an unexpected delay in the comet's brightening after the breakup.
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Astronomers using the James Webb Space Telescope have detected water in the interstellar comet 3I/ATLAS with deuterium levels 30 to 40 times higher than in Earth's oceans. This heavy hydrogen ratio exceeds that of any known solar system comet by at least 10 times. The findings suggest the comet originated from a cold, distant region around an ancient alien star.
European Space Agency's Mars orbiters have observed the third known interstellar comet, 3I/ATLAS, as it passed near the Red Planet. The faint visitor, discovered in July 2025, revealed a glowing coma in images taken from about 30 million kilometers away. Researchers are analyzing the data to uncover its composition and origins.
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The Gemini telescope has released dramatic images of comet 3I/ATLAS, capturing its structure and activity in high detail. These images provide valuable data for astronomers studying cometary behavior.