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Planets without stars to orbit raise important questions about how planets evolve and what habitability might look like across the cosmos.

A pair of giant planets circling a star more than 1,100 light-years from Earth looks almost too bloated to be real. Each world is about the size of Jupiter. Yet both are far lighter than expected, ...

The NASA/ESA/CSA James Webb Space Telescope just solved a conundrum by proving a controversial finding made with the NASA/ESA Hubble Space Telescope more than 20 years ago. In 2003, Hubble provided ...

Scientists discover unique ‘phoenix’ planet that was born from a dying star - World is made up of pieces of a dying sun, ...

A star about 600 light-years away is giving astronomers a front-row view to the environments in which rocky planets like Earth form around the most abundant stars in the universe. Called ISO-ChaI 147, ...

Rocky planets may have been able to start forming just 100 million years after the Big Bang, thanks to enormous early supernovae that scattered planet-building elements across space. Simulations found ...

Measurements of ancient light from the cosmic microwave background suggest that the universe is remarkably flat. But that ...

Mysterious blasts of radio waves from across the universe called fast radio bursts help astronomers catalog matter. ESO/M. Kornmesser, CC BY-SA Chris Impey, University of Arizona If you look across ...

When Galactus gets hungry, the whole universe looks like a snack. With an eternal hunger that can only be satiated by consuming worlds, Galactus is a primal force of nature and a looming symbol of ...