'Do all aliens really need sunlight?' ...

There is a category of planet that belongs to no star. It was thrown clear of its solar system early in the chaos of planetary formation, sent drifting into the galaxy's cold interior with no sun to ...

Moons orbiting sunless rogue planets could harbor liquid water oceans for up to 4.3 billion years, sustained by dense hydrogen atmospheres and tidal heating. (Nanowerk News) Liquid water is considered ...

Our solar system hosts almost 900 known moons; more than 400 orbit the eight planets while the remaining orbit dwarf planets, asteroids, and Trans-Neptunian Objects (TNOs). Of these, only a handful ...

It’s no secret that the James Webb Space Telescope (JWST) is the most advanced telescope in history. As such, demand to use it is high—incredibly high. Last week the Space Telescope Science Institute ...

Finding moons beyond our solar system, called exomoons, has always been a daunting task. But a recent debate among astronomers highlights just how challenging this cosmic game of hide-and-seek truly ...

The extrasolar planets Kepler-1625b and Kepler-1708b are supposedly the home worlds of the first known exomoons. A new study now comes to a different conclusion. Only two of the more than 5300 known ...

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In observations of the planets Kepler-1625b and Kepler-1708b from the Kepler and Hubble space telescopes, researchers had discovered traces of such moons for the first time. A new study now raises ...