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What does a red shift tell astronomers about stars or galaxies?
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What does red shift tell us about other galaxies?
It tells us that most galaxies are moving away from us.
What does analysis of colors tell astronomers about objects in space?
Doppler shift tells the distance form the earth station
Why do astronomers study nebulae?
Becuase nebulae tell us how stars get formed so the composition, density and size of a nebulae cloud says a lot about its age, likelihood of stars forming and the type of stars that might form.
What is red-shift and what does the size of the redshift tell us about the distant galaxies?
Red shift is the apparent elongation of the wavelength of light reaching us from distant sources of light due to the expansion of space in between. The amount of red shift can be used to work out the recessional velocity of a galaxy and it's distance from us.
What does a red shift tell astronomers about the movement of an object?
"Redshift", which means that the frequency of the light as seen by us is LESS than the frequency at which it was emitted, tells us that an object is moving away from us.
What does red shift tell us about other galaxies?
It tells us that most galaxies are moving away from us.
What can a stars spectrum tell astronomers about a star?
What elements the star is made of.
What can a stars spectrum can tell astronomers?
What makes up the star or element.
How old are the stars in spiral galaxies?
A spiral galaxy is just a type of galaxy but I can tell you that the stars in the middle are the oldest and the ones on the outside are the youngest.
How can astronomers tell how old the universe is by looking at the stars?
Well I think its because stars flake and burn out when their really old so that could help them tell.
Why couldn't early astronomers tell the difference between single stars and the entire galaxies when the looked at the night sky?
Unless you have a extremely powerful telescope, a galaxy and a star look almost the same.
What does analysis of colors tell astronomers about objects in space?
Doppler shift tells the distance form the earth station
How did Indian astronomers become experts of astronomy without telescopes?
They could tell by the moon and stars and saw a pattern.
Galaxies that show redshift in color must be red in color?
No. You can figure out exactly what elements are in stars and galaxies by examining the color spectrum of the light detected; the frequencies of the bright and dark lines in the spectrum tell you what's what. But there's a problem. For distant galaxies, the light spectrum is wrong. The frequency lines of the spectrum are all too low. One possible explanation of the incorrect spectrum is that those stars and galaxies are MOVING AWAY from us, and that the spectrum is shifted toward the red end of the color spectrum because of the Doppler effect. So scientists believe that the "red-shift" on the color spectrum of stars and galaxies indicate that they are moving away. Not all galaxies show a red-shift; the Andromeda Galaxy, M31, shows a pronounced BLUE-shift, indicating that it is heading TOWARD us. In fact, scientists believe that the Milky Way and Andromeda will probably collide in about 3 billion years.
Why do astronomers study nebulae?
Becuase nebulae tell us how stars get formed so the composition, density and size of a nebulae cloud says a lot about its age, likelihood of stars forming and the type of stars that might form.
How does the Doppler shift determine the distance of Sirius?
It doesn't. The Doppler shift can tell you how fast something is moving towards us or away from us; not how far it is. Only in the case of distant galaxies can this be used to estimate the galaxy's distance, because of the expansion of the Universe (galaxies that move away from us faster are generally farther away).
How is ultra violent studied by astronomers?
UV is studied in strength from stars like our sun. they use this to tell how old the other star is and how far it is from death
