One point of evidence in support of dark matter is the way in which the speed of stars, gas and dust in a galaxy varies with their distance from the center of the galaxy, known as the galactic ...

As a kid, did you ever play that game Guess Who? If you haven't, it's actually kinda fun. You have two players, each with a board in front of them. On the board are a bunch of flip cards with ...

One of the earliest indications of the existence of dark matter came from an examination of the rotation of nearby galaxies. The study showed that stars orbit the galaxy at speeds that indicate ...

Physicists discovered stars near the edge of the Milky Way travel more slowly than those closer to its center -- a surprise suggesting our galaxy's gravitational core may have less dark matter than ...

Details are available in the January 10th, 2006, edition of The Astrophysical Journal 636, pp. 721-741. The paper entitled "Galaxy Rotation Curves Without Nonbaryonic Dark Matter" is co-authored by ...

When we look out at the luminous matter in the Universe -- stars, galaxies, clusters of galaxies and the hot gas in and between them -- it tells a couple of different stories. One is the story of how ...

The rotation of stars in galaxies such as our Milky Way is puzzling. The orbital speeds of stars should decrease with their distance from the center of the galaxy, but in fact they all have the same ...

For reasons that remain mysterious, it seems our galaxy is different from the others. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Stars have ...

A study by MIT physicists suggest the Milky Way’s gravitational core may be lighter in mass, and contain less dark matter, than previously thought. By clocking the speed of stars throughout the Milky ...