The interstellar comet 3I/ATLAS changed significantly as it flew by the sun last fall, astronomers have discovered.
The Jupiter-bound spacecraft JUICE spotted the interstellar invader comet 3I/ATLAS spraying enough water into space to fill 70 swimming pools a day.
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A rare long-period comet is here — here’s how to find comet C/2025 R3 (PanSTARRS) before sunrise this April, with key dates, viewing tips and the best mornings to look.
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A dramatic breakup near the sun erased hopes of a bright comet lighting up the evening sky this week.
Our solar system’s famous “invader” might be as old as the Milky Way itself.
The unprecedented observations of comet 41P/Tuttle–Giacobini–Kresák show its rotation slowing, reversing and then speeding up, and jet-like outbursts of gas might be providing the push.
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Astronomers using NASA’s Hubble Space Telescope have found evidence that the spinning of a small comet slowed and then reversed its direction of rotation, offering a dramatic example of how volatile activity can affect the spin and physical evolution of small bodies in the solar system. This is the first time researchers have observed evidence […]
The interstellar comet 3I/ATLAS will soon leave our solar system, never to return, but the observations of the comet will live on in NASA’s public data archives. More than a dozen NASA science missions turned their instruments to observe the comet, which is only the third identified object to be visiting our solar system from […]
NASA’s Hubble Space Telescope has captured a rare cosmic moment: a comet breaking apart in real time.
In a happy twist of fate, NASA’s Hubble Space Telescope just witnessed a comet in the act of breaking apart. The chance of that happening while Hubble watched is extraordinarily minuscule. The findings published Wednesday in the journal Icarus. The comet K1, whose full name is C/2025 K1 (ATLAS)—not to be confused with interstellar comet […]