What is the color of a star that is moving away from an observer?

Answer 1

The color of the star is more dependent on its size and temperature; the colors of strs vary. However, if the star was moving rapidly away from us, the color would be shifted to the red end of the spectrum from its natural color. This is calle redshift. A link can be found below for more inforation.

Answer 2

The color of a star that is moving away from an observer can vary. But what is important is that it will appear to be a different color than it would if an observer was "in orbit" about the star. What will happen is that the color of the star will be changed or "shifted" toward the red end of the color spectrum. This is called redshift, and it occurs because of Doppler effect.

When the distance between an observer and a star is increasing, the color of the light (and all other electromagnetic radiation) that the observer sees will be "less" or have a lower frequency than what it is at the source. As the color of a star can naturally vary, the color an observer sees will vary, But in all cases with receeding stars, the color will be moved down in frequency in the electromagnetic spectrum. A yellow star like our sun will appear to be "less yellow" and "more red" than it actually is to an observer who is separated from it by an increasing amount of distance.

If you guessed by now that the amount of frequency shift is greater for objects moving apart faster, then you've got a handle on things. Use the links below to learn more and lock the information in.

Answer 3

Amazing ! Not only won't you let us see the diagrams, but you won't even show us

the resting spectrum, or tell us what element it is. You've done everything you can

to make sure you don't get an answer. We're pleased to oblige.

Answer 4

Stars come in all colors, depending on their brightness and composition. Some are blueish, many are red, and some have a more yellowish tint.

The "normal" color of a particular star can be calculated by the spectrum of a star; different elements radiate different discrete frequencies of light. For stars that have a "radial velocity" - a velocity toward or away from the Earth - we can calculate their speed toward or away by measuring the "Doppler shift" of the light.

Like a car horn or a train whistle, sound sources moving toward us have a higher than normal pitch, and sound sources moving away have a lower than normal pitch. (In fact, you can calculate the exact speed by measuring the change in pitch as the source passes by, and switches from higher to lower pitch!)

Higher frequencies of light are more bluish, and lower frequencies are more reddish. Scientists talk about "red-shifted" light when referring to stars moving away, and "blue-shifted" light for stars moving toward us. For example, we know that the Andromeda Galaxy M31 is probably going to collide with the Milky Way in about 3 billion years based on the blue-shift of its spectrum!

But most things are moving away, and the farther away, the faster it seems to be going. We can use the amount of the "red shift" of light from distant galaxies to determine not only how fast they are going, but how far away they are.

Answer 5

The spectrum of such a galaxy is redshifted, meaning that it shifts towards lower frequencies.

Answer 6

There is a change in frequency; this effect is called "Doppler effect".

Answer 7

The Dopple Shift

Answer 8

Red shifted from the Doppler effect.

Answer 9

s

Answer 10

red :)