Despite the ubiquity of dark matter in every galaxy out there, it has been difficult to pin down how much influence the mysterious substance has in our own galaxy, particularly in the inner regions of ...

New, groundbreaking research shows that rotation curves of galaxies stay flat indefinitely, corroborating predictions of modified gravity theory as an alternative to dark matter In a breakthrough ...

Verlinde's "emergent gravity" theory proposes that gravity is not a fundamental force but arises from the configuration of quantum entities, potentially explaining discrepancies between general ...

Early 20th-century astronomical observations revealed unexpectedly high rotational speeds in the outer regions of spiral galaxies, prompting the hypothesis of dark matter by Fritz Zwicky in 1933. Vera ...

Researchers have found a significant new relationship in spiral and irregular galaxies: the acceleration observed in rotation curves tightly correlates with the gravitational acceleration expected ...

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 ...

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 ...