In a groundbreaking study published in The Astrophysical Journal, astronomers have discovered high-velocity gas clouds near ...

Unusually fast-moving gas clouds near a nearby galaxy suggest they may have come from outside the galaxy. Scientists have ...

The European Space Agency said Wednesday that scientists have discovered what might be only the third known interstellar ...

Planetariums were a hit with the public. Within decades, they had spread around the world – the first planetarium in the ...

NASA said the comet will make its closest approach to the sun in late October, scooting between the orbits of Mars and Earth ...

We share your best smartphone photos selected as AP's Smartphone Picture of the Week, taken by you - the readers! The post ...