Dark matter is our best explanation for why galaxies stay together when they don’t seem massive enough to keep up gravitational attraction. But now a largely-dismissed alternative theory has some actual proof backing it up. This could get complicated.
Monthly meetings are held on the second Tuesday of each month at 7:30 PM online at this link
Join us at RavenCon April 24-26. We'll also have telescopes there for daytime and evening viewing.