Elliptical galaxies have a red color because the stars in them are older and cooler. An example of an elliptical galaxy is Maffei 1.
Elliptical Galaxies.
The elliptical galaxy Messier 87 in the Virgo Cluster is known for containing mostly older stars with a reddish color. These stars are typically low in mass and have evolved over billions of years, giving the galaxy its distinct red hue.
The Milky Way galaxy contains mostly older stars with a red color, particularly in the central bulge and halo regions. These stars are typically red giants and red dwarfs, which have aged and evolved from their initial blue color to appear red as they reach the end of their life cycles.
A globular cluster. These dense spherical collections of stars are typically found around the outskirts of galaxies and are among the oldest known star groupings in the universe. Their red color is due to the abundance of older, cooler stars within the cluster.
Elliptical Galaxies.
Milky Way: Arms extend from a core full of black holes Elliptical Galaxy: Contains mostly older stars with a red color Irregular Galaxy: Contains dust, gas, and young stars Apex :)
The central bulge of our Milky Way galaxy contains older stars, mostly red and yellow in color. These stars are typically found in globular clusters and form a dense, spherical region at the core of the galaxy.
Elliptical galaxies mostly consist of a collection of older red stars in the center, with blue and white stars located in the outer regions. This is because elliptical galaxies have a smooth, featureless appearance and are dominated by older stellar populations in their central regions.
Young stars are blue because they are also hotter than older stars, which have cooled down to make white, yellows, then oranges, then red.
That sounds like the description of an elliptical galaxy.
The reddest galaxies are typically elliptical galaxies. These galaxies are composed mostly of older, cooler stars, which emit light that appears redder due to their lower temperatures. Additionally, elliptical galaxies often have little to no ongoing star formation, leading to a depletion of hotter, younger stars that would otherwise contribute blue light to the galaxy's overall color. As a result, their light is dominated by the reddish hues of older stellar populations.
The oldest stars are now mostly either white dwarfs or neutron stars. A few of the largest may be black holes.