What galaxies appear red?
What galaxies appear red?
Initial conditions for a galaxy determines its rate of star formation. For example, elliptical galaxies collapse early and form stars quickly. The gas is used up in its early years and today has the appearance of a smooth, red object with no current star formation.
Is there a red galaxy?
Scientists have spied a new type of ultra-red galaxy lurking at the far reaches of the universe, a new study reports. Using NASA’s Spitzer space telescope, the astronomers spotted four remarkably red galaxies nearly 13 billion light-years from Earth — meaning it’s taken their light about 13 billion years to reach us.
What are the names of a galaxy?
Named galaxies
| Galaxy | Constellation |
|---|---|
| Milky Way | Sagittarius (centre) |
| Needle Galaxy | Coma Berenices |
| Wolf-Lundmark-Melotte | Cetus |
| Pinwheel Galaxy | Ursa Major |
Is there a purple galaxy?
Some of these facts unique to Gioiello include that it emits purple light and is incredibly massive, containing 400 trillion times more mass than the Sun.
Why are some galaxies red?
When a galaxy moves away from Earth at high speed, the wavelengths of the light waves it emits are stretched, appearing more red (see the Hubble diagram project for more information). Galaxies moving away quickly have more “redshift,” and thus appear more red.
Why are old galaxies red?
Older galaxies are redder because there are higher fractions of low-mass red stars, as the high-mass blue stars are short-lived. Thus, the combination of the observed light, the distance, and the color gives us the total mass in stars. Galaxies also contain gas, which can contribute significantly to the total mass.
Why are galaxies red?
Galaxies might be very dusty, for example, since dust tends to block visible light but allow longer wavelength infrared to pass (thus making the galaxies appear reddish in color). They might be actively forming new stars, since that process heats up local dust and makes galaxies luminous in the infrared.