When an emission line of helium from a galaxy is shifted toward red, it means:
The galaxy is moving away from the viewer.
Responses
The galaxy is moving toward the viewer.
The galaxy is moving toward the viewer.
The galaxy contains a small percent of hydrogen.
The galaxy contains a small percent of hydrogen.
The galaxy is moving away from the viewer.
The galaxy is moving away from the viewer.
The galaxy contains a large percent of hydrogen.
1 answer
When an emission line of helium from a galaxy is shifted toward red, it means:
The galaxy is moving away from the viewer.