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ESA Confirms A11pl3Z as Third Known Interstellar Visitor
- On July 1, 2025, the ATLAS Survey discovered A11pl3Z, marking humanity’s third interstellar visitor from outside our solar system.
- Analysis indicates A11pl3Z has a hyperbolic orbit with eccentricity near 6 and a velocity around 60 km/s, confirming its interstellar origin.
- The interstellar object A11pl3Z measures about 10–20 km, is at +18th magnitude, and currently just inside Jupiter’s orbit near Serpens Cauda and Sagittarius.
- Astronomers are livestreaming observations tonight at 22:00 UTC; JWST and Rubin Observatory are ready, confirming no threat to Earth.
- More broadly, the discovery suggests interstellar objects are more common than thought, with the Vera Rubin Observatory expected to detect them monthly, opening new scientific opportunities.
238 Articles
238 Articles
Newly spotted comet is third interstellar object seen in our solar system
WASHINGTON :Astronomers are tracking a newly spotted comet hailing from parts unknown, only the third time such an interstellar object has been observed visiting our solar system.According to U.S. space agency NASA, the interloper - named 3I/ATLAS - was first spotted on Tuesday by an Asteroid Terrestrial-impa
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.
NASA Confirms Arrival of New Interstellar Object in Our Solar System: Here’s What We Know
(Credit: NASA/JPL) Welcome to this week’s installment of The Intelligence Brief… On July 1st, a new object from interstellar space entered our solar system, as recently confirmed by NASA. In our breakdown of the exciting news, we’ll be looking at 1) an introduction to 3I/ATLAS, our latest interstellar visitor, 2) the unusual size estimates of this object, 3) the search for similar interstellar objects, and 4) the collection of additional data us…
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