Dark Matter: Still needed

There was a recent media kerfuffle about MOND (Modified Newtonian Dynamics), an alternative physical theory that supposedly eliminates the need to have dark matter be a major part of the universe.

However, as Ethan Siegel and Sean Carroll pointed out, this alternative theory only works for one set of observations that are explained by dark matter. There are others about which MOND has nothing to say.

Hence dark matter explains much more than MOND, and for that reason alone is to be preferred as a physical theory.

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.