Where did all the dwarf galaxies go?

Astronomers believe they've worked out why there are so many fewer dwarf galaxies than predicted: they're moving so fast that their gas is simply whipped away.

The violent star formation of dwarf galaxies

NASA's Hubble Space Telescope has managed to capture an image of the faint irregular galaxy NGC 3738, which astronomers describe as a starburst galaxy. 

Dwarf galaxies reveal new insights on dark matter

Scientists have narrowed down the range in which dark matter could exist, thanks to a new analysis technique.