Mars. From forming black holes to phantom dark energy, discover the cosmic mysteries astronomers uncovered last year.

Rogue planets — worlds that drift through space alone without a star — largely remain a mystery to scientists. Now, ...

NASA’s search for life beyond Earth is no longer a distant dream but a coordinated campaign that now stretches from Martian ...

New images from NASA 's Hubble Space Telescope have revealed an enormous, oddly shaped disk of gas and dust around a single ...

It also pushed them to tighten their standards, especially when the conversation shifts from “interesting chemistry” to ...

With 3I/ATLAS streaking away from our planet, speculation remains as to whether the interstellar comet is alien or not.

A strange world just 47 light-years from Earth is rewriting what scientists thought they knew about alien planets. Hidden ...

The central mystery posed by 3I/ATLAS is not merely about whether we are alone, but about the sheer scale of the potential ...

If nonliving materials can produce rich, organized mixtures of organic molecules, then the traditional signs we use to ...

Harvard's Avi Loeb argues 3I/ATLAS shows signs of alien technology, from its 0.2% probability flight path to bizarre metal ...

Harvard scientist Avi Loeb presents chilling theories that interstellar object 3I/ATLAS is alien technology, citing anomalies ...

What planet is most like Earth? Reseachers have identified several exoplanets similar to our planet, but none that are an ...