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What can astronomers infer from the fact that other galaxies are moving away from ours?
Wiki User
∙ 13y ago
You can infer that the universe is getting larger.
Wiki User
∙ 13y ago
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What does red shift tell us about other galaxies?
It tells us that most galaxies are moving away from us.
Why was the term light year in invented?
Distances to other planets, other stars and other galaxies are very large, making measurements in meters or kilometers difficult to handle (although scientific notation can be used). As a result, astronomers have gotten accustomed to measure distance within the Solar System in astronomical units, and to other stars and galaxies, either in light-years or in parsecs.
How is the Big Bang theory supported by the observed Doppler shift of galaxies?
Doppler shift shows that galaxies are moving away from each other at rates that depend on how far apart they are. According to the Big Bang Theory, the universe began with an enormous explosion. Then, the entire universe began to expand everywhere at the same time.The doppler shift shows that galaxies are moving away from each other at rates that depend on how far apart they are.
How can galaxies collide if they are moving away from each other?
Not all galaxies are moving away from each other. In fact the galaxy Andromeda is moving toward the Milky Way and they will eventually collide, because Andromeda is so much bigger than our Milky Way it will preatty much eat us and ruin our galaxy. Good news: it won't happen in our life time, and we are the 2nd largest gallaxy in the Local Group and no other (known) gallaxies are moving toward us.
What measurements do scientist use to measure stars?
Hi. It is a pleasure to help. If you mean the distance from the earth to the stars, astronomers use a technique called parallax which is a way to infer the distance to a star based on triangulation. Astronomers use a unit called the light-year, which is the distance travelled by the light in one year. Since light travels at a speed of 300,000 km/s, in one year light leaves behind a distance of 9.4605284 × 1015 meters. Some stars are only a few light- years away. Others are very far away, in the limits of the observable universe. If the astronomer wants to measure the distance to a very far away star, then parallax is no longer useful. Other techniques and properties are employed such as the Cepheids, which are a very particular class of stars in which the period of variation in their brightness is related to their distances. So by measuring the period, astronomers are able to infer the distance.Measuring distances to stars and to distant galaxies is one of the central problems in Astronomy. It is VERY important. Several research efforts are devoted to measuring distances. In fact, in the 1920's E. Hubble first measured the distance to other galaxies using cepheids. The Hubble Sapce Telescope still measures distances to distant galaxies using a variety of observational techniques.If you mean the measurement of the radius of a star, astronomers do that by knowing the details of the cameras used to photograph the star and the known distance to it. Sometimes studying the properties of the light emitted by stars it is possible to infer its radius based on the theory of stellar evolution.Prof. João Rodrigo LeãoRio Grande Federal University - BRAZIL
Who said that there were other galaxies?
Astronomers, looking at deep space photographs of the Universe.
What did many astronomers believe about galaxies in the 1920s?
Among other things, that they were static in space
Is the Milky Way the Largest of all Galaxies?
No one knows the answer to that because astronomers haven't been able to explore any other galaxies besides the Milky Way.
Are galaxys moving away from each other which means the universe is contracting?
No.More specifically:Not all galaxies are moving away from each other. The Milky Way and Andromeda galaxies are moving towards each other (and at a pretty good clip, too: about 300 km/s). The entire "local group" of galaxies is moving in the general direction of something called the "Shapley Supercluster".Very distant galaxies do tend to be moving away from each other, but that means the universe is expanding, not contracting.
Are all galaxies moving away from ours because your galaxy is at the center of the universe?
Other galaxies are moving away because the universe is expanding, but we are not at the centre of the universe.
What does red shift tell us about other galaxies?
It tells us that most galaxies are moving away from us.
In which direction are mostly all galaxies moving?
Actually, most galaxies are all moving away from all other galaxies, not just from ours. The exception is the Andromeda galaxy, with which the Milky Way is on a collision course.
What evidence do astronomers have that supports the idea that the galaxies are moving away from us?
Observations through telescopes, red shift and several other recordings proves this.
What type of scientist studies the Solar System stars and galaxies?
Collectively they are called Astronomers and Astrophysicists. Either professionals or amateurs.There are many types of astronomers, defined by how they study the stars. The most well-known are those that use optical telescopes followed closely by those that use Radio-telescope to pick up wavelengths other than visible light. there are many others and many other ways to collect data on the galaxies and stars.Astrophysicists are astronomers and may also collect direct data, yet they are more interested in the working behind the data. They deal in physics and theories of the galaxies.
What would it mean if galaxies were moving toward each other?
Pokemon rulez
What does the big bang theory say about the movement of galaxies?
The Big bang theory states that the galaxies are in fact moving away from each other
What is the unit that astronomers use to measure the differences between stars and other galaxies?
They do not use units: they use the fact that stars are not galaxies. For example, you don't use units to measure the difference between children and countries.
