NASA's Hubble Space Telescope has captured the clearest and most detailed images to date of the interstellar comet 3I/ATLAS, a visitor traveling through our solar system at approximately 130,000 miles per hour (209,215 km/h). Discovered in July 2025 by a telescope in Chile, 3I/ATLAS is only the third known interstellar object to pass through the solar system. The comet features a dusty coma and the beginning of a tail, with a nucleus estimated to be between 320 meters and 5.6 kilometers in diameter, smaller than initially thought. Observations suggest 3I/ATLAS resembles comets originating from the outer reaches of our solar system. Despite earlier speculation, NASA confirmed that the object is not an alien spacecraft but a comet with an icy core surrounded by gas and dust. Ground-based telescopes are expected to continue observing the comet until September 2025, after which it will become obscured by the Sun's glare. The comet survived a close pass by the Sun in 2022, contrary to previous assumptions that it had disintegrated.