Space

Hubble spots fifth Pluto moon

Dark galaxies spotted for first time

New vortex appears over Titan's pole

Astronomers find first-ever middle-sized black hole

Vela is a massive star nursery

Worms live longer in space – might people do the same?

NASA's Mars panorama is breathtaking

Life's building blocks could be near Martian surface

Team spots 'impossible' binary stars