Author Pete Lawrence
Pete Lawrence

Pete Lawrence

Astronomer and presenter

Pete Lawrence is an experienced astronomer and astrophotographer, and a presenter on BBC's The Sky at Night.

Recent articles by Pete Lawrence
Section from a chart showing the location of comet 3I/ATLAS in January 2026. Credit: Pete Lawrence

Observing comet 3I/ATLAS in January 2026

Comet 3I/ATLAS is a rare interstellar visitor, a comet not gravitationally bound to any star, and only the third such object ever identified. When discovered by the Asteroid Terrestrial-impact Last Alert System (ATLAS) survey in Rio Hurtado, Chile, on 1 July 2025, it was 670 million km from the Sun, technically within the inner Solar System. Its closest approach to Earth, 270 million km or 1.8 AU, was on 19 December 2025. Perihelion occurred on 29 October, 203 million km or 1.36 AU from the Sun. Thought to originate from a region of the Milky Way populated by older stars,
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