In a dramatic U-turn, Harvard astrophysicist Professor Avi Loeb has now admitted it is “most likely natural”, with experts ...

He cited the astronomical gaffe in January, when The Minor Planet Center in Cambridge, Mass., announced the discovery of an ...

The first unmistakable signal from another intelligence would rank alongside fire and writing in the story of our species, ...

While online conspiracies swirl, comet 3I/ATLAS made a close pass by Earth on Dec. 19, giving astronomers a rare glimpse of a ...

Did an alien spacecraft just fly by Earth? That’s the question a lot of people, including Harvard astrophysicist Avi Loeb, are asking right now. A massive interstellar object called ...

Since its discovery, some people have speculated that interstellar visitor 3I/ATLAS could be alien technology. Harvard ...

Aliens might be transmitting communications signals to each other across exoplanets, some astronomers think. Since these signals are likely sent as narrowband radio waves, we may now have a way to ...

A composite image of the hydrogen plume surrounding comet 3I/ATLAS. Credit: NASA It's official, if far too late for some people's liking: Interstellar object 3I/ATLAS is a comet. We already knew that, ...

Scientists say the colour shift in interstellar comet 3I/ATLAS is due to gases in the comet's coma reacting to solar heat.