Do elliptical galaxies form stars?
Unlike their spiral cousins, elliptical galaxies have shut down their star formation engines. Devoid of much of the needed gas and dust, they no longer create new stars. Instead, they hold tightly to ancient stars that have lived for billions of years.
What happens when two elliptical galaxies collide?
When the galaxies collide, it causes vast clouds of hydrogen to collect and become compressed, which can trigger a series of gravitational collapses. A galaxy collision also causes a galaxy to age prematurely, since much of its gas is converted into stars.
Why are the spiral galaxies bluer than the elliptical galaxies?
So the answer to your question is: The reason spiral galaxies are not red is that they keep forming new stars, the most luminous of which are blue. And the reason elliptical galaxies are not blue is that they’re unable to form new stars, so only the red ones are left.
Can an elliptical galaxy evolve into a spiral explain your answer Can a spiral turn into an elliptical How?
We know this because spiral galaxies rotate quickly (on an astronomical scale), while elliptical galaxies do not. There is no way that an elliptical galaxy could spontaneously begin rotating, so there is no way an elliptical galaxy could turn into a spiral galaxy.
Do elliptical galaxies rotate?
Most elliptical galaxies have a flattened shape and rotate around their shortest axis, like a wheel.
What are the characteristics of elliptical galaxies?
There are four distinguishing characteristics of the ellipticals: (a) they have much more random star motion than orderly rotational motion (star orbits are aligned in a wide range of angles and have a wide range of eccentricities); (b) they have very little dust and gas left between the stars; (c) this means that they …
What can you conclude about dark matter?
Dark matter is called dark because it does not appear to interact with the electromagnetic field, which means it does not absorb, reflect or emit electromagnetic radiation, and is therefore difficult to detect.
Do we have dark matter on Earth?
Dark matter is a hypothetical component to our universe, used to explain many strange behaviors of stars and galaxies. Despite the almost overwhelming evidence that dark matter does indeed exist, we still don’t know what it’s made of.