Related: Dark Matter Dark Matter Cast Dark Matter Tv Show Dark Matter Book Dark Matter Wiki Dark Matter Series Dark Matter Netflix Dark Matter Kirby
Wiki infoIn 1933, Swiss astrophysicist Fritz Zwicky, who studied galaxy clusters while working at the California Institute of Technology, made a similar inference. Zwicky applied the virial theorem to the Coma Cluster and obtained evidence of unseen mass he called dunkle Materie ('dark matter'). Zwicky estimated its mass based on the motions of galaxies near its edge and compared that to an estimate based on its brightness and number of galaxies. He estimated the cluster had about 400 times more mass than was visually observable. The gravity effect of the visible galaxies was far too small for such fast orbits, thus mass must be hidden from view. Based on these conclusions, Zwicky inferred some unseen matter provided the mass and associated gravitation attraction to hold the cluster together. Zwicky's estimates were off by more than an order of magnitude, mainly due to an obsolete value of the Hubble constant; the same calculation today shows a smaller fraction, using greater values for luminous mass. Nonetheless, Zwicky did correctly conclude from his calculation that the bulk of the matter was dark.

Has The First Dark Matter Particle Been Found IFLScience

Dark matter filaments detected for the first time

Has dark matter finally been found Big news coming soon

Has dark matter finally been found Big news coming soon

Not so dark after all Dark matter particles may FINALLY

Dark matter is found in the Milky Ways core Elusive

Scientists believe theyve found the universes missing

A new class of galaxy has been discovered one made almost

Dark matter science

Its Real Astronomers Just Discovered a Second Galaxy

Newly detailed map of dark matter may help unravel its

Dark Matter Filaments Bind Galaxies Together

Space mystery as 19 galaxies with no dark matter found

Hubble finds ring of dark matter ESAHubble

Faint glow within galaxy clusters illuminates dark matter

Dark Matter Archives Midnight in the Desert

Dark Matter Black Holes Could Be Destroying Stars at the

Blow for dark matter theory as scientists find faint

Heart of lonesome galaxy has more dark matter than expected

Xray signals in neighbouring galaxies could be emitted by

Galactic clash unmasks dark matter ordinary mater and

Hubble finds dark matter ring in galaxy cluster ESAHubble

What is Dark Matter A New Clue YouTube

The Dark Matter Mystery Planetarium Show Trailer YouTube

65 best images about Astrophysics Dark Matter Energy on

Has dark matter finally been found Big news coming soon

Signs of the secrets of the universe found NewsCut

Dark matter filaments detected for the first time