This is an infrared view of our closest neighbour (i say closest..its 2.5 million light years away). Andomeda Galaxy. This picture is a composite of two orbiting observatory images: the far infrared using Herschel (colored orange), and the X-ray emission using XMM-Newton (blue).
2.5million light years...that means that we're seeing light thats 2.5 million years old and if you looked back at our galaxy from Andromeda you would be looking at an Earth 2.5million years ago. Mind blowing !