What makes a star a star? A strange 'in‑between' celestial object is testing astronomers' boundaries

A star called TOI-2155 lies around 1,350 light-years (839 trillion miles) from Earth. It is a little bigger, heavier and ...

Planet found orbiting a dead star could preview what will happen to our solar system

A Jupiter-size exoplanet orbiting a dead star baffled astronomers. But the planet named WD 1856 b could preview the fate of ...

New star activity catalog could sharpen hunt for habitable worlds

Searching for habitable worlds beyond our solar system involves more than having a planet orbit within its star's habitable ...
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A 'new' star could finally appear in the night sky this week in a once-in-a-lifetime explosion

The "Blaze Star" T. Coronae Borealis could brighten dramatically this week to shine with the brilliance of the North Star ...

Planet orbits so close to its star that their magnetic fields connect

At the right point of the orbit and stellar cycle, the star’s chromosphere brightens.