3I/ATLAS: Third Interstellar Object

This is a Chile news story, published by Space.

Chile news

For more Chile news, you can click here:

more Chile news

News about cosmology & the universe

For more cosmology & the universe news, you can click here:

more cosmology & the universe news

Space news

For more news from Space, you can click here:

more news from Space

About the Otherweb

Otherweb, Inc is a public benefit corporation, dedicated to improving the quality of news people consume. We are non-partisan, junk-free, and ad-free. We use artificial intelligence (AI) to remove junk from your news feed, and allow you to select the best science news, business news, entertainment news, and much more. If you like this article about cosmology & the universe, you might also like this article about

third interstellar

. We are dedicated to bringing you the highest-quality news, junk-free and ad-free, about your favorite topics. Please come every day to read the latest interstellar objects news, incoming interstellar object news, news about cosmology & the universe, and other high-quality news about any topic that interests you. We are working hard to create the best news aggregator on the web, and to put you in control of your news feed - whether you choose to read the latest news through our website, our news app, or our daily newsletter - all free!

interstellar object

Space

•

Science

New interstellar object 3I/ATLAS: Everything we know about the rare cosmic visitor

Summary

Nutrition label

83% Informative

3I/ATLAS is the third known interstellar object to enter our solar system.

The object was first spotted on July 1, 2025 , by the Deep Random Survey remote telescope in Chile .

It follows a highly hyperbolic orbit, meaning it's not gravitationally bound to the sun.

It could help scientists unlock clues about the formation of other star systems.

It will reach approximately 167 million miles ( 270 million km ) from Earth on Dec. 29 .

Interstellar object 3I/ATLAS will not be visible to the naked eye in the night sky.

It will be traveling at around 42 miles ( 68 km ) per second / second or about 152,000 miles ( 245,000 km ) a day.

Amateur astronomers will be able to observe it as soon as the bright moon leaves the sky, likely in the weeks following the last quarter moon on July 18 .

Most large observatories are in the Southern Hemisphere , so expect numerous images to be shared.

3I/ATLAS may be the brightest and biggest interstellar visitor yet, but it almost certainly won't be the last.

VR Score

Informative language

Neutral language

Article tone

informal

Language

English

Language complexity

Offensive language

not offensive