This little smudge doesn't look like much now, but it's a newly discovered comet that's heading towards the sun. C/2012 S1, as it's known, will make its closest pass in November of next year, by which point astronomers are predicting that it may appear brighter than a full moon. Much brighter.

We live inside a universe, that much is (more or less) certain. What's less certain is what exists outside our universe, but scientists now think that they might have spotted evidence of other universes, four of which seem to have smashed into us.

At precisely 3 p.m. Eastern Time tomorrow, the largest full moon in 18 years will show its ginormous self. The moon will be so close to Earth that it's already being called a "supermoon" when it gets its act on.

The European Southern Obervatory's Very Large Telescope array sits on top of a mountain in Chile, where it's so dark and clear that you can see your shadow cast by the light from the Milky Way. This is great, but it doesn't help see past all the dust surrounding the galaxies themselves. For that, they've got an ultra-sensitive infrared camera that strips away the haze to reveal the structure of galaxies in exquisite detail.