0
Why is the light reaching us from some celestial object shifted toward the red or blue end of the spectrum?
Wiki User
∙ 8y ago
Due to something similar to the Doppler effect. A wave reaching us from an object travelling towards us will look shorter than the same wave from an object travelling away from us. In light shorter waves gets bluer end longer waves get redder.
Audra Weissnat
Wiki User
∙ 8y agoLight radiated or reflected from an object can change frequency relative to the viewer by virtue of Doppler effect or Doppler shift. We're familiar with it here on earth because it affects sound. A freight train's whistle sounds higher in pitch when the train is coming at us. It is lower as it passes, and lower still as it goes away from us. That's frequency shift by the Doppler affect. Light works the same way. Relative motion between the source and viewer causes the observed shift of light's spectrum. For astronomy, most all (extragalactic) objects are moving away, and the light will be red-shifted (lower frequency) than it actually is. Redshift can give us an idea of the retreating velocity of an object. Links are at the bottom.
That may be true; however, another explanation exists. Light escaping from gravity (a star) is red shifted. Using this explanation, maybe the Universe is not moving away from the Earth. Maybe the Universe is not expanding (maybe it is).
Wiki User
∙ 12y agoIt's all because of the temperature of the Star. Red Stars are cooler than Blue stars.
Red stars are cooler than our own Sun, whereas blue stars can be 30,000 times hotter. [See Link]
Add your answer:
Earn +20 pts
What information can you learn about a celestial object just by measuring the peak of its black-body spectrum?
Its temperature.
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.
What is the celestial equivalent of latitude?
The declination of a celestial object is the exact equivalent of latitude.
What type of celestial object does your planet orbit?
A star.
What celestial object come from a Oort cloud?
comets
Why is the light reaching us from celestial objects shifted towards the red or blue end of the spectrum?
Due to something similar to the Doppler effect. A wave reaching us from an object travelling towards us will look shorter than the same wave from an object travelling away from us. In light shorter waves gets bluer end longer waves get redder.
Why is light reaching us from some celestial objects shifted toward the red or blue end of the spectrum?
Due to something similar to the Doppler effect. A wave reaching us from an object travelling towards us will look shorter than the same wave from an object travelling away from us. In light shorter waves gets bluer end longer waves get redder.
Why is the light reaching us from some celestial objects shifted towards the red or blue end of the spectrum?
Due to something similar to the Doppler effect. A wave reaching us from an object travelling towards us will look shorter than the same wave from an object travelling away from us. In light shorter waves gets bluer end longer waves get redder.
What information can you learn about a celestial object just by measuring the peak of its black-body spectrum?
Its temperature.
A spectral line that appears at a wavelength of 321 nm in the laboratory appears at a wavelength of 328 nm in the spectrum of a distant obect we say that the object's spectrum is?
A spectral line that appears at a wavelength of 321 nm in the laboratory appears at a wavelength of 328 nm in the spectrum of a distant object. We say that the object's spectrum is red shifted.
Which of the following might be evidence for an extrasolar planet?
Doppler-shifted stellar spectrum and physics calculations that indicate a low-mass object
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.
What celestial object is about 24000 miles from the earth?
There is no celestial object at that distance.
Is cloud a celestial object?
No. A celestial object is an object in outer space, such as a planet, star, meteor or comet. Clouds are not in outer space, therefore they are not a celestial object.
From your location what is the best definition of a celestial object?
From Earth, a celestial object is any object outside or above Earth's atmosphere.
What celestial (space)object can a meteoroid come from?
The space rock is the celestial space object that a meteoroid comes from.
Analyzes an object's spectrum?
A spectrometer analyses an object's spectrum.
