Interstellar objects as a research area focus on the detection, characterization, and dynamical analysis of solid bodies that originate outside a planetary system and traverse or enter another, such as the Solar System. This field integrates observational astronomy, celestial mechanics, planetary science, and astrochemistry to constrain their trajectories, compositions, sizes, shapes, rotational states, and possible formation environments. Research investigates their implications for planetesimal formation, mass loss from planetary systems, galactic dynamical processes, and the transfer of material between stellar systems, as well as optimizing observational strategies and instrumentation for their rapid identification and follow-up before they exit observational reach.
Astronomers manning an asteroid warning system caught a glimpse of a large, bright object zipping through the solar system late on July 1, 2025.
Astronomy
Jul 6, 2025
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NASA has discovered an interstellar comet that's wandered into our backyard.
Planetary Sciences
Jul 3, 2025
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Astronomers on Wednesday confirmed the discovery of an interstellar object racing through our solar system—only the third ever spotted, though scientists suspect many more may slip past unnoticed.
Astronomy
Jul 3, 2025
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Astronomy news always seems to break over coffee, on laptop startup. That was the case on Wednesday morning, when word of a curious new object started flashing across the message boards.
Astronomy
Jul 2, 2025
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GJ504b is an exoplanet orbiting a sun-like star GJ 504. It is estimated to be three to six times more massive than Jupiter, making it the lowest-mass planet ever directly imaged. This faint and cold planet, often referred ...
Astronomy
Jun 19, 2025
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An international team of astronomers reports the discovery of a new ultracompact binary of the AM CVn type exhibiting infrequent outbursts. The detection of the newfound system, designated TCP J07222683+6220548, was detailed ...
In late 2017, a mysterious object tore through our solar system at breakneck speed. Astronomers scrambled to observe the fast-moving body using the world's most powerful telescopes. It was found to be one quarter mile (400m) ...
Astronomy
Apr 15, 2025
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Interstellar objects are among the last unexplored classes of solar system objects, holding tantalizing information about primitive materials from exoplanetary star systems. They pass through our solar system only once in ...
Astronomy
Mar 20, 2025
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A trio of astronomers with the University of Tokyo and Niigata University has discovered a possible new class of interstellar object. In their study, published in The Astrophysical Journal, Takashi Onaka, Itsuki Sakon and ...
Interstellar material has been discovered in our solar system, but researchers continue to hunt for where it came from and how it got here. A new study led by Western astrophysicists Cole Gregg and Paul Wiegert recommends ...
Planetary Sciences
Mar 6, 2025
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