A maser signal, an equivalent of a laser, has reached us from a distant galaxy. Its origin and intensity make it an exceptional case. The signal traveled several billion years through space ...

The largest 3D map of the universe reveals over 47 million galaxies, but dark energy remains an unsolved mystery.

I live near a few volcanoes. One of them – Mount St. Helens – is bubbling with molten material that will probably gush out as lava someday. I asked my friend Johannes Hämmerli about lava. He’s an ...

The Dark Energy Spectroscopic Instrument, or DESI, has finished its planned 3D map of the universe — but the work is far from over. Carnegie Mellon University researchers are already pushing the ...

New simulations show that early ultraviolet light controlled whether ultra-faint dwarf galaxies could form stars.

The Dark Energy Spectroscopic Instrument (DESI) has completed its originally planned five-year mission and mapped more than ...

Blue oceans, green forests, a cozy blanket of oxygen. Our planet is a super comfy home. It’s hard to imagine there was ever a time it didn’t exist. I asked my friend Julie Ménard how Earth formed. She ...