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How do you measure all the distances of the 100 billion galaxies in the universe?
Wiki User
∙ 9y ago
I think it's currently impossible to do that - specifically, to measure the distances of ALL the galaxies. There are just too many Astronomers might take a small section of the sky - say, a square degree or even a fraction thereof, analyze the galaxies in such a section, and extrapolate. As to the measurement itself, there are different methods; the Wikipedia article on "cosmic distance ladder" can give you a general idea. In summary, the farthest galaxies are simply measured by their redshift. That is to say, the farther they are, the faster they move away from us; and this can be measured using the Doppler effect.
Wiki User
∙ 9y ago
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Why light-years are used to measure distances in the universe?
because it is the fastest way to measure in very long distances for example earth to other far away planets
Define light year and explain its value in astronomy?
A light-year is the distance light travels in a year - equivalent to almos 10 million million (or 1013) kilometers. In popular astronomy, distances to stars or galaxies are often stated in light-years; although astronomers often prefer another measure, the parsec, equivalent to about 3.26 light-years.A light-year is the distance light travels in a year - equivalent to almos 10 million million (or 1013) kilometers. In popular astronomy, distances to stars or galaxies are often stated in light-years; although astronomers often prefer another measure, the parsec, equivalent to about 3.26 light-years.A light-year is the distance light travels in a year - equivalent to almos 10 million million (or 1013) kilometers. In popular astronomy, distances to stars or galaxies are often stated in light-years; although astronomers often prefer another measure, the parsec, equivalent to about 3.26 light-years.A light-year is the distance light travels in a year - equivalent to almos 10 million million (or 1013) kilometers. In popular astronomy, distances to stars or galaxies are often stated in light-years; although astronomers often prefer another measure, the parsec, equivalent to about 3.26 light-years.
What unit do astronomers use to measure the masses of stars and star like objects in the universe?
The official unit for mass in science (and elsewhere), of course, is the kilogram. In astronomy, for ease of comparison, the masses of stars, and even galaxies, are often expressed in "solar masses", meaning multiples of the mass of our Sun.
What does the universe look like on very large scales?
The evidence to date suggests something on the order of 25 - 30 billion light years in diameter. IMPROVED ANSWER - This question doesn't make any sense because your question means like if you are asking about how much a car had traveled which started travelling billions years ago. So the appropriate answer to this question is that universe is increasing its size day by day and it will never stop, so there is no limit.
Why do scientist measure the distance from earth to near galaxies?
To measure the Doppler shift. This tells if the galaxies are moving towards us or away from us and a what rate. They want to see if the universe is slowing down its expansion or continuing to expand more rapidly. If its slowing down then eventually it would theoretically be able to collapse back on its self starting the whole process again. If not then the universe would just continue to expand. Either way they want to see whats happening.
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.
Will astronomers measure all the distances of 100 billion galaxies in the observable universe?
Someday astronomers may have measured all the distances of 100 billion galaxies in the observable universe.
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.
Will astronomers measure redshifts of 100 billion galaxies in the observable universe?
No. We do not have time to make so many measurements.
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
How do you measure how old space is?
Age of spaceScientists use the method of relative dating. They say the universe in 10 billion to 15 billion years old. AnswerWe "measure" the age of the universe by looking out into space. We have discovered that most galaxies outside our Milky Way are moving away from us. And the farthest objects we can see are moving away from us the fastest. If we do a "reverse calculation" using the data about those distant galaxies as a starting point, we can take the "movie" of the expanding universe and "run it backwards" to the beginning when Big Bang began to build the universe. And the ball park figure is on the order of 13.5 to 14 billion years. ----------------------------------------------------------------------------------------------New Anwser----------------------------------------------------------------------------------------------Space has no age its all just theories.
What is a Long unit of measure for great distances?
The parsec is 3.26 light years. Astronomers measure distances to remote galaxies in megaparsecs--millions of parsecs. This is about the longest commonly used length metric.
Why light years are used to measure distances in the universe?
because it is the fastest way to measure in very long distances for example earth to other far away planets
Why light-years are used to measure distances in the universe?
because it is the fastest way to measure in very long distances for example earth to other far away planets
Do you measure distances to galaxies in light years or astronomical units?
Galaxies are always calculated in light years or parsecs. Most galaxies are calculated in mly of kpc (Million light years or thousand parsecs) because of the distances.The Andromeda Galaxy is our closest large galaxy, and that is 2.54 mly or 778 kpc.If we used AU that would equate to 160,000,000,000 or 160 billion AU.
Why scientist don't expect to find galaxies that have large blue shift?
This should be because of the fact that the Universe is expanding. You see a blueshift when objects move closer to you. Other than super distant galaxies, most galaxies will not measure to be a blueshift due to the fact that the Universe is expanding and accelerating.
Why scientist don't expect to find galaxies that have large blue shifts?
This should be because of the fact that the Universe is expanding. You see a blueshift when objects move closer to you. Other than super distant galaxies, most galaxies will not measure to be a blueshift due to the fact that the Universe is expanding and accelerating.
