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ESA Confirms A11pl3Z as Third Known Interstellar Visitor
- NASA discovered the third interstellar object, initially designated A11pl3Z, on July 1, 2025, using the ATLAS telescope in Chile.
- This discovery follows earlier detections of Oumuamua in 2017 and comet Borisov in 2019, with A11pl3Z showing a high eccentricity near 6.0 and a hyperbolic orbit from interstellar space.
- The comet, named 3I/ATLAS and expected to reach perihelion around October 30, 2025, will pass safely at least 1.6 astronomical units from Earth and 0.4 AU from Mars.
- Dr. Paul Chodas confirmed there is no uncertainty about the comet’s interstellar origin, while Marshall Eubanks estimated it could be about 20 kilometers wide and moving at 60 km/s outbound.
- Astronomers worldwide will study 3I/ATLAS through the coming months using ground-based telescopes and space assets, with a livestream planned for July 3, as it poses no threat to Earth.
234 Articles
234 Articles
Astronomers spot an interstellar object zipping through our solar system
By Ashley Strickland, CNN (CNN) — A newly discovered object speeding through our solar system is sparking excitement among astronomers because it’s not from around here. Believed to be a comet, the object is only the third celestial body from beyond our solar system ever to be observed in our corner of the universe. This interstellar visitor, now officially named 3I/ATLAS, became known when the NASA-funded ATLAS (Asteroid Terrestrial-impact Last…
Astronomers track object possibly from beyond the solar system
Astronomers are monitoring an object headed our way that may have wandered over from another star system.Scientists have discovered what might be only the third known interstellar object to pass through our solar system, the European Space Agency said
Astronomers spotted a third ‘interstellar object’ streaking through our solar system
Astronomers have just confirmed the discovery of a rare visitor from beyond our solar system — a newly detected interstellar comet. Officially named 3I/ATLAS, the comet was first spotted on July 1 by NASA’s ATLAS survey telescope in Chile. This is only the third known interstellar object to pass through our cosmic neighborhood, following in the footsteps of 1I/ʻOumuamua in 2017 and 2I/Borisov in 2019. The interstellar comet is currently travelin…
Scientists Are Still Trying to Explain Mysterious Space Object 'Oumuamua's Odd Behavior
Nearly five years after its discovery, the interstellar object continues to baffle astronomers. A new analysis suggests a natural, non-alien origin for its strange movement.
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