The presence of deuterium, an isotope of hydrogen, in 3I/ATLAS suggests the interstellar comet formed in a much colder place ...

An interstellar comet carries water unlike anything in our solar system, revealing a far colder birthplace and clues about ...

Long before 3I/ATLAS slipped through the inner solar system, its water had already recorded the kind of place it came from.

Astronomers now estimate there is at least one planet for every star in our galaxy. These worlds, called exoplanets, are ...

Around stars like our Sun, the most common planets aren't giant Jupiters but smaller cousins: sub‑Neptunes, which resemble ...

Our galaxy, the Milky Way, is home to multiple wonders. There is our biggest star, VY Canis Majoris, the column-like structures known as the Pillars of Creation, and, in the middle of it all, a ...

A new study suggests that the comet that rambled past us from another star last year likely originated in a cold, isolated ...

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