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Is the sun blue shifted or red shifted?
If you were on a plant looking into the stars the sun would be blue shifted. When looking up at the sky we see the sun moving towards us making it look smaller.
If a star is moving toward Earth it is?
If a star is moving toward Earth, it will experience a redshift in its light spectrum due to the Doppler effect. This means that the wavelengths of light will be stretched and appear more red. This effect allows astronomers to measure the speed and direction of a star's movement.
How can astronomers tell if a star is approaching or receding from earth?
The relative motion between the observer and wave source causes an apparent change in frequency which is known as Doppler Effect. On combination with identification of spectra, it can also be used to find if the start is moving away or towards the earth, When there is shift in lines of spectra towards the red end of visible spectrum the star is said to be travelling away from the earth.
How do people know when a star is moving toward or away from the earth?
blue shifted
If the earth rotates from the west to the east why do the sun and stars move from east towards the west?
They are not actually, moving, they just appear to be moving because we are. Consider that if you are on a train moving forward, objects that you pass by appear to move toward the read of the train.
If a star is moving toward earth is it?
blue shifted
Is a star is moving toward earth it is?
blue shifted
Is the sun blue shifted or red shifted?
If you were on a plant looking into the stars the sun would be blue shifted. When looking up at the sky we see the sun moving towards us making it look smaller.
If a star is moving toward Earth it is?
If a star is moving toward Earth, it will experience a redshift in its light spectrum due to the Doppler effect. This means that the wavelengths of light will be stretched and appear more red. This effect allows astronomers to measure the speed and direction of a star's movement.
Does the medium of space make distance stars appear to be more red shifted only because they are farther away?
Distant stars appear red shifted because they are travelling away from Earth. It just happens that more distant stars are moving faster, so there is a greater red-shift the further a star is from the Earth.
Is an object that is not moving relative to Earth a blue shift?
No, an object not moving relative to Earth is not a blue shifted object. With no relative motion, an object will not be subject to Doppler effect and will not red or blue shift. For an object to be blue shifted, the distance between the object and Earth must be decreasing. The object must be closing on Earth or vice versa.
Are the clouds moving, or is the earth moving?
The clouds appear to move across the sky because of the Earth's rotation.
All of the constellations appear to be moving because what is moving?
Because of Earth's rotation.
What happen to the spectrum of a star moving toward the earth away from the earth?
If a star is moving towards Earth. The light is seen as 'blue shifted'. As we look at our sun, on the colour spectrum, black lines appear. When looking at distant stars, we can tell if they are moving away from us (Red shift) or getting closer to us (Blue shift). This is because the black lines shift to the red or blue end of the spectrum depending on which direction the star is travelling.
How do astronomers determine the speed at which a galaxy is moving?
By examining its spectrum, and identifying absorption lines in it. Lines are shifted toward shorter wavelength if the object is moving towards us. They're shifted toward longer wavelength if the object is moving away from us.
If a galaxy is moving towards the earth what direction does its spectrum move?
If a galaxy is moving towards the Earth, its spectrum will be blueshifted. This means that the wavelengths of its emitted light are compressed, resulting in a shift towards the blue end of the spectrum.
How would other galaxies appear to move relative to Earth if the universe were shrinking?
If the Universe was shrinking the galaxies would appear to be moving towards the Earth, and look more blue than they should. This is the opposite to the universe expanding where galaxies would appear to be moving away from the Earth, which we know due to "red shift". Andromeda would be the exception since it's directly moving towards the Milky Way.
