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A spectroscope relies on?
A spectroscope relies on the phenomenon of diffraction. This scientific instrument separates light into its different wavelengths. It was invented in 1814 by a German optician, Joseph von Fraunhofer.
Who thought of galaxies?
astronomers did
How do astronomers group galaxies into three types, according to their characteristics?
Astronomers group galaxies into three types based on their characteristics: spiral galaxies have arms that spiral out from a central bulge, elliptical galaxies are oval-shaped with no distinct structure, and irregular galaxies have a chaotic and asymmetrical shape.
Will astronomers do all the redshifts of the 100 billion galaxies in the universe?
Perhaps in the future astronomers will do all the redshifts of the 100 billion galaxies in the universe.
Cepheid variable stars have been used to determine the?
1)placing cosmological constraints on the expansion of the Universe through the determination of distances to galaxies 2)to measure many characteristics of our galaxy and our relationship to it
If light from galaxies is redshifted what can astronomers conclude about galaxies?
That the galaxy is moving away from us.
Will astronomers measure all the distances of the 100 billion galaxies in the universe?
It is possible that someday astronomers will measure all the distances of the 100 billion galaxies in the universe.
Why do astronomers theorize that most of matter in galaxies and clusters of galaxies is dark matter?
most of the mass in a cluster of galaxies is invisible, which provides astronomers with the strongest evidence that the universe contains a great amount of DARK MATTER
Why do astronomers theorize that most of the matter in galaxies and clusters of galaxies is dark matter?
most of the mass in a cluster of galaxies is invisible, which provides astronomers with the strongest evidence that the universe contains a great amount of DARK MATTER
How many galaxies do astronomers believe there are?
Billions. (rounded)
How galaxies discovered?
They were discovered by astronomers using telescopes.
Will astronomers measure all the sizes of 100 billion galaxies in the observable universe?
It is possible that astronomers will measure all the sizes of 100 billion galaxies in the observable universe.
