The Universe

Characteristics of the Universe

What are the possible shapes of the universe?

There are three general categories of possible shapes of the universe: open, flat, and closed. These adjectives refer to the kind of curvature that space has overall. Massive objects cause space to bend and curve; the universe itself is a massive object, so the entire cosmos is curved, too.


This is a web preview of the "The Handy Astronomy Answer Book" app. Many features only work on your mobile device. If you like what you see, we hope you will consider buying. Get the App