Behold a galaxy twice the size of the Milky Way!

Our Milky Way is just a spiral galaxy, but NGC 1232 here is a grand spiral galaxy, its diameter twice as long as ours. Everything is bigger in NGC 1232, including the giant satellite galaxy warping it out of shape. » 1/08/12 12:00pm 1/08/12 12:00pm

The Milky Way might be surrounded by invisible dark matter galaxies

Based on how gravity affects the gases at the edge of our galaxy, we should have a satellite galaxy located about 26,000 light-years away...except nobody's ever seen it. This might be because it's composed almost entirely of dark matter. » 1/17/11 12:37pm 1/17/11 12:37pm