For a long time, people have looked up at the stars with both curiosity and fear, wondering when the next messenger from the deep galaxy would come. That time has come, and it has a billion-year-old secret following it. The object, called 3I/ATLAS, has become the center of attention for astronomers all over the world. It is a rare, time-limited sample of material that formed around a distant star.
The ATLAS survey in Chile first saw the visitor on July 1, 2025. It came into our inner solar system at an incredible speed of 61 km/s (136,000 mph). Scientists are finally putting together the basic structure of this strange visitor, which is thought to be between 8 and 13 billion years old — almost three times the age of our own sun — as it starts its long, lonely journey away from our sun.
