"Interstellar Visitor" 3I/ATLAS Changes Color Again
Recent observations indicate that the interstellar object 3I/ATLAS has developed a faint bluish hue, suggesting a possible color shift. This marks the third time its appearance has changed since discovery.
According to astronomers, 3I/ATLAS underwent a rapid and unexpected brightening while it was obscured by the sun. Earlier color changes were also temporary, with none persisting for long.
The celestial body, identified as the third known interstellar object to pass through our solar system, was observed racing toward the sun at more than 130,000 mph (210,000 km/h) in early July. Researchers believe 3I/ATLAS could be the oldest of its kind, likely ejected from its original star system on the edge of the Milky Way around seven billion years ago.
After that ejection, the comet wandered through interstellar space until its current visit to our system. It passed close to Mars in early October and has recently emerged from behind the sun, becoming visible again to telescopes on Earth. Spacecraft in orbit were able to track it even during its hidden phase.
The comet reached its closest point to the sun, known as perihelion, in October.
Summary
The interstellar comet 3I/ATLAS has shifted color again after a brightening event, revealing its ancient origins and continued journey through our solar system.