galaxies
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The Different Shapes of Galaxies
By now, we’ve spent a heck of a lot of time exploring spiral galaxies. It makes sense — they’re certainly the most photogenic. Seriously. Do me a favor and do a quick Google search for galaxies. When I did, nearly…
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Exploring the Milky Way’s Spiral Arms
The Milky Way — our home galaxy — is a spiral galaxy, a classification I often describe as pinwheel-shaped. The main difference between a spiral galaxy’s shape and a pinwheel’s shape is that spiral galaxies, like the Milky Way, only…
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How Big is the Milky Way?
How big is our galaxy, anyway? And more than that — how do we know? Consider that we can’t really take a photo like this of our galaxy. We’re inside it, and space travel has not advanced to the point…
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The Hubble Space Telescope
The Hubble Space Telescope is one of the most famous telescopes in the world. Oops, excuse me — one of the most famous telescopes built. Hubble, after all, is certainly not in this world. Unless you call the universe the “world,”…
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Where Are We?
In the 4th century B. C. E. (Before Common Era), scientists believed the Earth was the center of the universe. Before that, they were convinced the Earth was flat. Now, most of us know that the Earth is not the…
