Mars orbiters have given astronomers an unexpected new vantage point on 3I/ATLAS, sharply tightening estimates of the interstellar visitor’s trajectory through the inner solar system. By combining those off‑Earth images with ground‑based tracking,

In the spirit of the season, the interstellar comet 3I/ATLAS is changing color as it leaves the sun behind — shifting from a reddish tint to a faint green glow. That visible change signals the comet is reacting to solar heat and releasing new gases in space, giving scientists fresh clues about what it is made of and how it behaves.

NASA is probing a sudden loss of contact with its MAVEN Mars orbiter after rare 3I/ATLAS data, raising questions about timing and the mission's future.