Mysterious Star System Visitor: Comet 31/Atlas Changes Color Again as It Prepares to Leave the Solar System
America ı By Jackie Allen
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Star System Visitor Color-Shifting Mystery
Astronomers first observed 31/Atlas glowing green, a hue likely caused by carbon gases common in comets. Later, it turned blue-white, and more recently, it has taken on a reddish tone. Dr. Mei Lin, an astrophysicist at the National Astronomical Observatory of Japan, explained, “These color changes suggest that sunlight is reacting with the comet’s surface materials — possibly ice, gas, and dust — causing them to heat, vaporize, and chemically alter.” Experts say such changes give vital clues about what interstellar objects are made of. “Each color shift is a message from the comet,” said space researcher Dr. Alan Gupta. “It tells us how alien materials respond to our Sun’s radiation.”What Scientists Are Learning
The discovery of 31/Atlas marks only the third known interstellar object ever detected — following ‘Oumuamua in 2017 and 2I/Borisov in 2019. Studying it could help scientists understand the chemical makeup and behavior of materials that formed around other stars. Researchers across Hawaii, Chile, Japan, and the Canary Islands are tracking its movement and brightness to determine whether 31/Atlas is more like a comet, an asteroid, or something else entirely. Because the Sun’s gravity does not bind the object, it will soon exit our solar system, never to return.For More Details
Comet 3I/ATLAS Is Leaving the Solar System: How To See It Before It’s Gone - Newsweek 3I/Atlas continues to surprise scientists after changing color for the third time since entering our solar systemHow to See 31/Atlas Before It’s Gone
Stargazers in the Northern Hemisphere will have a final opportunity to glimpse 31/Atlas this December. On December 19, it will pass within 168 million miles of Earth, roughly 1.8 times the distance between our planet and the Sun.
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