A star whose spectral lines are shifted toward the red end of the spectrum?

Question

has a magnetic field
is moving toward us
is moving away from us or
is moving across our line of sight ?

Answer 1

is moving away from us or

In physics and astronomy, redshift occurs when the electromagnetic radiation, usually visible light, that is emitted from or reflected off of an object is shifted towards the red end of the electromagnetic spectrum. More generally, redshift is defined as an increase in the wavelength of electromagnetic radiation received by a detector compared with the wavelength emitted by the source. This increase in wavelength corresponds to a decrease in the frequency of the electromagnetic radiation. Conversely, a decrease in wavelength is called blue shift.

Answer 2

Its moving away from us

Also known as the red shift, It is caused by the popular doppler effect.

From the wiki
In physics and astronomy, redshift occurs when the electromagnetic radiation, usually visible light, that is emitted from or reflected off of an object is shifted towards the red end of the electromagnetic spectrum. More generally, redshift is defined as an increase in the wavelength of electromagnetic radiation received by a detector compared with the wavelength emitted by the source. This increase in wavelength corresponds to a decrease in the frequency of the electromagnetic radiation. Conversely, a decrease in wavelength is called blue shift.

Any increase in wavelength is called "redshift", even if it occurs in electromagnetic radiation of non-optical wavelengths, such as gamma rays, x-rays and ultraviolet. This nomenclature might be confusing since, at wavelengths longer than red (e.g., infrared, microwaves, and radio waves), redshifts shift the radiation away from the red wavelengths.

A redshift can occur when a light source moves away from an observer, corresponding to the Doppler shift that changes the frequency of sound waves. Although observing such redshifts, or complementary blue shifts, has several terrestrial applications (e.g., Doppler radar and radar guns),[1] spectroscopic astrophysics uses Doppler redshifts to determine the movement of distant astronomical objects.[2] This phenomenon was first predicted and observed in the 19th century as scientists began to consider the dynamical implications of the wave-nature of light.

Answer 3

the reply is C. it quite is the Doppler Redshift. The Doppler result's the typical time period used to describe a change in frequency in both EM radiation (mild, radio, etc) or in Sound waves. to cite from the Redshift wiki: "redshift is defined as a upward push contained in the wavelength of electromagnetic radiation received by a detector compared with the wavelength emitted by the source. This advance in wavelength corresponds to a cut back contained in the frequency of the electromagnetic radiation. Conversely, a cut back in wavelength is termed blue shift."

Answer 4

Moving away from us

Answer 5

is moving away from us

shift to the red: away from us
shift to the blue: towards us

Answer 6

Moving away from us.
The wavelength is basically stretched out, increasing the wavelength when it reaches earth.

Answer 7

is moving away from us.