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Why can't the dark matter in galaxy clusters be neutral hydrogen?
Wiki User
∙ 13y ago
Neutral hydrogen emits at 21 cm in the radio band. Studies have shown that less than 1% of the mass of most galaxies is neutral hydrogen. This is far less than the amount of matter that needs to be there to explain the observational consequences.
Wiki User
∙ 13y ago
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Does dark matter relate to a supernova?
Probably not. Dark matter is not believed to concentrate well in or around masses the size of stars. But it does concentrate well around galaxies and clusters of galaxies. Most of the mass of a galaxy like ours is believed to be in a sphere of dark matter in the galaxy's spherical halo.
How does the traditional theory of the formation of the galaxy explain the origin of globular clusters?
Cluster's form because gravity gradually builds a center of mass which over time accumulates more and more matter which can explain the formation of galaxies as well as globular clusters.
What is the state of matter of hydrogen?
Hydrogen is a gas in normal conditions.
What holds the galaxies and solar systems together?
Galaxies are held together by gravity. So are Solar Systems. In the case of galaxies, and galaxy clusters, it isn't entirely clear what type of masses provide this gravity - the amount of known matter is simply too small, by a factor of 5-10. For more information, do some reading on "dark matter".
Why are older stars located at the center of a spiral galaxy while younger stars make up arms of a spiral galaxy?
Older stars are generally towards the centre of a galaxy as they will be the first to accumulate around the galactic centre. Because they are older, there is less "free" hydrogen, so new star formation will occur wherever, there is enough matter to form a new star. This generally is around the outer edges of a galaxy.
Are stars the first thing that formed in our galaxy?
According to the Big Bang Theory of the formation of the universe, the first matter reacted with so-called dark matter to develop the early structure of the universe. Once there were enough neutral atoms formed (mostly hydrogen) these would have aggregated into stars and stellar clusters as interstellar gas does today. The structure of the stars would have depended on local topography and gravity, but galaxies likely would have formed after the first large clusters compressed, and took in enough matter to begin their rotation.
Does dark matter relate to a supernova?
Probably not. Dark matter is not believed to concentrate well in or around masses the size of stars. But it does concentrate well around galaxies and clusters of galaxies. Most of the mass of a galaxy like ours is believed to be in a sphere of dark matter in the galaxy's spherical halo.
What is found in the Milky Way galaxy's galactic halo?
"The halo primarily contains individual old stars and clusters of old stars ("globular clusters"). It may be over 130,000 light years across. The halo also contains "dark matter," which is material that we cannot see but whose gravitational force can be measured." to shorten the answer - individual stars, clusters, and dark matter.
What is the evidence for dark matter?
Wherever you look, galaxies and galaxy clusters are observed to have much more mass than the sum of the known matter (stars, dust, gas, black holes). Galaxies rotate too fast for the known amount of matter, galaxies in a galaxy cluster move too fast, and gravitational lensing indicates a larger mass than the known masses.Wherever you look, galaxies and galaxy clusters are observed to have much more mass than the sum of the known matter (stars, dust, gas, black holes). Galaxies rotate too fast for the known amount of matter, galaxies in a galaxy cluster move too fast, and gravitational lensing indicates a larger mass than the known masses.Wherever you look, galaxies and galaxy clusters are observed to have much more mass than the sum of the known matter (stars, dust, gas, black holes). Galaxies rotate too fast for the known amount of matter, galaxies in a galaxy cluster move too fast, and gravitational lensing indicates a larger mass than the known masses.Wherever you look, galaxies and galaxy clusters are observed to have much more mass than the sum of the known matter (stars, dust, gas, black holes). Galaxies rotate too fast for the known amount of matter, galaxies in a galaxy cluster move too fast, and gravitational lensing indicates a larger mass than the known masses.
What element makes up most matter?
Hydrogen is the most common element in our galaxy.
How does the traditional theory of the formation of the galaxy explain the origin of globular clusters?
Cluster's form because gravity gradually builds a center of mass which over time accumulates more and more matter which can explain the formation of galaxies as well as globular clusters.
Is hydrogen matter or not matter?
Hydrogen is matter
What is electrically neutral matter?
Electrically neutral matter is matter without a charge.
What clusters of gray matter contain neuron cell bodies and lie within masses of white matter?
cortex
What state of matter is oxygen and hydrogen?
oxygen and hydrogen are a type of matter called gas
Is it true that if you touch dark matter you blow up?
No.We know very little about dark matter; there are some ideas, but, as yet, nobody knows for sure what it is. What we doknow about dark matter, however, is that it interacts very weakly with other matter. Dark matter and "normal" matter are intermixed throughout space; if there were some catastrophic annihilation interaction between the two, we'd see the electromagnetic signature of that in observations of galaxies and galaxy clusters.
Where do matter come from?
It came from galaxy.
