Guide to Space
The Messier Catalog
Messier objects are celestial bodies that were observed by Charles Messier throughout his career. During his lifetime, any person who…
Galaxy Formation
[/caption] As you probably know, galaxies like our Milky Way are made up of billions of stars. But how did…
What is a Galaxy?
[/caption] You've probably heard that our Sun is located in the Milky Way galaxy. But what is a galaxy anyway?…
Other Galaxies
[/caption] We live on the Earth. That's just one planet orbiting a typical main sequence star called the Sun. And…
Galaxy Cluster
[/caption] The Universe is built up by various structures. Stars are collected together into galaxies, galaxies are collected into galaxy…
Whirlpool Galaxy
[/caption] The Whirlpool Galaxy is also known as Messier 51a, and it's one of the most familiar galaxies. If you've…
Galaxy Groups
[/caption] Gravity is a funny thing, it really wants to keep everything together. The Moon orbits the Earth because of…
Irregular Galaxy
Most galaxies can be categorized by their shape. Our own Milky Way is a spiral galaxy, for example, and the…
Elliptical Galaxy
[/caption] Our own Milky Way is classified as a spiral galaxy. But that's just one of many classification of galaxies.…
Sombrero Galaxy
[/caption] One of the most beautiful images ever taken by the Hubble Space Telescope is the Sombrero Galaxy; also known…