In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

They published a paper in the May 2008 issue of Monthly Notices of the Royal Astronomical Society entitled “The Collision Between the Milky Way and Andromeda.” (Admittedly, be wary of the term ...

Andromeda: A Key to Unlocking the Secrets of Spiral Galaxies Andromeda’s relative proximity makes it an essential proxy for studying spiral galaxies. Astronomers rely on it to draw parallels with the ...

But only one galaxy stands out as the most important nearby stellar island to our Milky Way -- the magnificent Andromeda galaxy (Messier 31). It can be seen with the naked eye on a very clear ...

Observations show Andromeda has a more active star formation history than the Milky Way, potentially due to a past galactic collision. NASA recently released images of the Andromeda galaxy ...

The Andromeda galaxy is our closest galactic neighbour, barring dwarf galaxies that are gravitationally bound to the Milky Way. When conditions are right, we can see it with the naked eye, though it ...

In about 4.5 billion years, the Andromeda Galaxy will collide with the Milky Way, resulting in a spectacular cosmic collision! Don’t worry, though – the distances between stars are vast ...

While Andromeda and the Milky Way likely formed around the same time ... in motion by their mutual gravitational pull – will not be a destructive explosion but rather a slow gravitational dance that ...

Beneath that is a selection of intriguing sights within the mosaic, labeled A through E: A: Star clusters in Andromeda, foreground stars in our Milky Way galaxy, and two background galaxies far ...