We are in the Milky Way. If you travelled on an extremely fast spaceship for more than two million years, you would reach our neighbour, the Andromeda galaxy. All other galaxies are even further away.
Can a galaxy (like NGC 3810 in this case) have a classical spiral structure and also be already dead?
ESA/Hubble and NASA
Extragalactic astrophysicists want to know how and why galaxies stop forming stars, change their shape and fade away. With help from citizen scientists, they’re figuring it out.
The origin of today’s burst of energy has astronomers puzzled.
AP Photographie /Flickr
A titanic eruption in our neighbouring galaxy, Andromeda, has sent shockwaves through the astronomical community here on Earth. NASA’s Swift satellite detected a flood of gamma rays at 21:15 UTC yesterday…
The Andromeda galaxy and its companions is challenging the very foundations of cosmology.
Adam Evans/Wikimedia Commons
Deep images of the sky reveal that the universe contains billions of galaxies. Some, such as our own Milky Way, are immense, containing hundreds of billions of stars. Most galaxies, however, are dwarfs…