Why is there something not nothing? The big bang isn’t the only answer

The idea that the universe started in the big bang revolutionised 20th-century cosmology. But it seems…

Why haven't we heard from aliens? There is a reason for the silence

The search for extraterrestrial intelligence has been going on for 60 years without success. Given the…

Iodine-powered satellite successfully tested in space for first time

Many satellites use xenon as a propellant to help them change orbit or avoid collisions, but…

Why do we exist? The meaning of life isn’t to be found in the stars

We are tiny specks of life in a vast, indifferent cosmos – but to say that…

Anti-satellite weapons: Will further tests make space more dangerous?

After the Russian military smashed a defunct satellite, creating a cloud of dangerous debris, other powers…

The biggest moons of Uranus may have oceans beneath their icy shells

Uranus’s two biggest moons, Titania and Oberon, may have enough radioactive heat to maintain deep liquid…

Enigmatic Planet Nine may have been seen by telescope in the 1980s

There is an ongoing debate about whether a huge “super-Earth” lurks in the far reaches of…

A fragment of our moon may be orbiting the sun with Earth

Kamo‘oalewa, an object that orbits the sun along with Earth, is unexpectedly red, leading researchers to…

Sterile neutrinos could explain dark matter – if we can find them

There are good reasons to think that neutrinos have a shy cousin that could explain dark…

Cosmogramma review: An eclectic mix of sci-fi and cosmic horror tales

An exciting collection of short stories by Courttia Newland covers a lot of interesting ground, finds…