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Why do astronomers observe the galaxy at millimeter wavelength?
Wiki User
∙ 14y ago
Millimeter wavelengths are short frequency radio waves astronomers use because they can see gases and other phenomena not visible in visible light. MM wavelengths are usually used where the air is dry so water vapor can't scatter the waves.
Wiki User
∙ 14y ago
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Suppose astronomers discover a galaxy that contains only old stars.What type of galaxy is it likely to be?
An elliptical galaxy
Does the colour of a galaxy reflect its distance away from the earth?
No, however, we can determine whether a galaxy is moving towards or away from us, by looking at the shift in its spectrographic analysis. There are "red shifts" and "blue shifts" in spectrographic results. "Blue shifts" indicate that a galaxy is moving towards us, because the wavelength of the light emitted by the galaxy is compressed, causing it to shift to the blue end of the colour spectrum. "Red shifts" indicate that a galaxy is moving away from us, because the wavelength of the light emitted by the galaxy is being stretched towards the red end of the colour spectrum.
What is the distance from earth to the furthest planet in our galaxy?
Astronomers once believed that planets were probably rare and unusual, and that tere might not be very many planets. However, recent discoveries indicate that planets are far more common; in fact, almost every star that astronomers have closely observed is discovered to have some planets! So it is likely that the "furthest planet in our galaxy" is on the other side of the galaxy from the Earth. The Milky Way galaxy has a radius of about 40,000 light years, and our solar system is about 3/4 of the way out from the center. So the "furthest planet in our galaxy" is probably somewhere near 70,000 light years away.
What is a word astronomers use to describe any fuzzy patch in the sky?
You might be asking about the Milky Way, the part of the sky where we are looking through the edge of our galaxy.
Do scientists still explore the Milky Way Galaxy and find new things?
Most of the observation astronomers make are inside our Galaxy. Of course we still find new things. The Milky Way is a very complex and diverse collection of celestial objects. We still have much to learn!
Which wavelength of radiation do astronomers use to detect these hottest stars in our galaxy?
infrared
What do astronomers called your galaxy?
The Milky Way Galaxy.
How do computers help astronomers understand what happens when galaxies collide?
By translating the math model of a galaxies and a galaxy collisions into a simulation. And theoritically observe the process by experimenting with the variables.
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.
How is it possible that galaxies in your local group still remain to be discovered?
Because astronomers are still developing techniques to observe objrcts that lie on the opposite side of our galaxy nucleus from us.
How can astronomers redshift a background galaxy that is masked out due to being close to the bright foreground galaxy?
Wavelengths is what allows astronomers redshift a background galaxy that is covered up. This is due to being close to the foreground galaxy.
Suppose astronomers discover a galaxy that contains only old stars.What type of galaxy is it likely to be?
An elliptical galaxy
Do most astronomers believe that earth is in a barreled spiral galaxy?
duh were living in a barred galaxy
Quasar in a sentence?
Astronomers have detected a quasar in a distant galaxy.
Who visited the galaxy or did anyone studied about the galaxy?
It's not possible that we could cross a galaxy. But astronomers study galaxies with huge telescopes.
Everything that you can observe is referred to as the galaxy?
No. "Universe". We can see things outside our galaxy.
What scientist studies the galaxy?
Astronomers. They study all things about space.
