Galaxy Cluster - Composition

Composition

There are three main components of a galaxy cluster. They are tabulated below:

Name of the components Mass fraction Description
Galaxies 1% In optical observations only galaxies are visible
Intergalactic gas in ICM 9% Plasma between the galaxies at high temperature. Emit x-ray radiation through thermal bremsstrahlung mechanism.
Dark matter 90% Most massive component, cannot be detected optically, inferred through gravitational interactions.

Read more about this topic:  Galaxy Cluster

Famous quotes containing the word composition:

    “There was not a grain of poetry in the whole composition of Lord Fawn, and poetry was what her very soul craved;Mpoetry, together with houses, champagne, jewels, and admiration.”
    —Anthony Trollope (1815–1882)

    “Every thing in his composition was little; and he had all the weaknesses of a little mind, without any of the virtues, or even the vices, of a great one.”
    —Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)