Interstellar object 3I/ATLAS, the third such visitor ever observed, is exhibiting unusual energy and chemical behavior as it ...

The familiar 24‑hour day is based on how long it takes the Sun to return to the same position in our sky, not on an ...

Vladimir Putin jokes that interstellar comet 3I/ATLAS is a 'secret weapon' as the mysterious object sweeps past Earth.

Across the Milky Way and beyond, planetary systems appear to fall into a few recurring blueprints, and recent exoplanet ...

The Milky Way is not the neat, flat pinwheel many of us learned about in school. Fresh data from precision star maps now show ...

It’s strange to think that something as ordinary as summer heat or winter cold traces back to a moment of utter chaos ...

From new exoplanetary neighbors and a weakening dark energy to the best evidence for life on Mars and an interstellar comet ...