New images of interstellar comet 3I/ATLAS are sparking excitement. This comet is behaving just like scientists expect—spitting out a large jet of gas and dust toward the sun. Discovered in late June and confirmed by NASA in July, 3I/ATLAS comes from a star system far outside our own. It’s only the third interstellar object we’ve ever spotted and is estimated to be between 3 to 7 miles wide, making it the largest interstellar object that has crossed our path.
Researchers believe 3I/ATLAS might be billions of years old, predating even the sun. Some have entertained the idea that it could be an alien spacecraft, but most scientists disagree. They argue that the comet’s activity aligns with what we know about comets. Recent images captured on August 2 by the Two-meter Twin Telescope in Spain show this comet’s natural behavior clearly.
The images combine 159 exposures of 50 seconds each, revealing the comet’s icy core as a dark spot surrounded by a glowing halo. A notable jet of material, depicted in purple, is jetting off toward the sun. This jet is a normal feature of comets, as explained by Miquel Serra-Ricart, an astrophysicist and chief science officer at the Teide Observatory. He stated that as comets approach the sun, they heat up unevenly. This can cause jets of gas to shoot out if certain weak spots on the comet’s surface warm quickly.
Comets are known for their tails, which can extend hundreds of millions of miles away from the sun. However, jets of material, like the one from 3I/ATLAS, can actually point towards the sun. Despite sounding mysterious, this is a common occurrence in comet behavior.
The 3I/ATLAS jet could extend around 6,200 miles from its surface, likely made up of dust and carbon dioxide. This aligns with what the James Webb Space Telescope detected around the comet in August. Comets often display both a sunward jet and an anti-solar tail simultaneously, with no need for any extraterrestrial technology.
3I/ATLAS passed Mars on October 3 and will reach its closest point to the sun on October 29. Although currently on the far side of the sun, it will become visible from Earth again in mid-November. Astronomers are eager to observe how this mysterious object may have changed after its close encounter with the sun.
This comet is part of a growing interest in interstellar objects, which can tell us more about the universe’s history. A recent survey indicated that the presence of such objects may be more common than previously thought, with experts estimating that our solar system sees several passing by each year. Each encounter gives scientists a chance to learn more about the origins and behavior of these far-off wanderers.
