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.
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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When astronomers detected the first known interstellar object, 'Oumuamua, in 2017, it sparked a host of new studies trying to understand the origin and trajectory of the galactic sojourner.
Planetary Sciences
Feb 17, 2025
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The appearance of the interstellar objects (ISOs) 'Oumuamua and Comet Borisov in 2017 and 2019, respectively, created a surge of interest. What were they? Where did they come from? Unfortunately, they didn't stick around ...
Planetary Sciences
Feb 12, 2025
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In 2017, NASA discovered and later confirmed the first interstellar object to enter our solar system.
Astronomy
Dec 16, 2024
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We know that interstellar objects occasionally visit our solar system. So far, we have only discovered two interstellar objects (ISOs), but that's mainly because we can only distinguish them from solar system bodies by their ...
Astronomy
Dec 12, 2024
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