Before our minds start to reel at these scales, let's return to the Andromeda Galaxy and examine it from our vantage point on the dust-grain planet we call Earth. The remarkable thing is that the ...

Our Milky Way galaxy ... considerably. "Planets will keep on orbiting as usual, though the constellation patterns visible from each planet will change," Dodson-Robinson said. Andromeda would ...

Moons orbit planets ... a little more complicated. Our galaxy is part of a collection of galaxies called the Local Group, ...