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How does distance between earth and sun compare to distance between earth and nearby stars and galaxies?
We measure distances between celestial objects (such as suns, planets, and galaxies) by a unit of measurement called "AU" which stands for, Astronomical Unit. One AU is the equivalent to 93 million miles, which is roughly the distance from earth to the sun. Let's compare that to the next closest star to us, Alpha Centauri, which is 4.4 light years away, or about 271,930 AUs!
Distances are Immense.
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How are cepheid variables used in determining distance?
Cepheid variables are a type of pulsating star whose brightness varies in a regular pattern. The key relationship used in distance measurement is the period-luminosity relation, which states that the longer the pulsation period of a Cepheid, the more luminous it is. By measuring the period of a Cepheid's brightness fluctuations, astronomers can determine its absolute brightness and compare it to its observed brightness to calculate the distance using the inverse square law of light. This method allows for accurate distance measurements to nearby galaxies and helps establish the scale of the universe.
Why are magellanic clouds described as nearby?
The Mellaganic Clouds are two dwarf galaxies, satellite galaxies of our own Milky Way. They are "nearby" only to the extent that they are the closest galaxies to our own. Ferdinand Magellan, the leader of the first European voyage to circumnavigate the Earth, named them because they appeared to be permanent clouds in the southern sky. The Clouds aren't visible from Europe or North America.
Best unit to measure distance to nearby stars?
While lightyears are used in measuring distances between galaxies and suns and the distances to extra solar planets, the measurements inside our solar system (between the planets in our solar system are miles and kilometers. The larger A.U.s (Astronomical Units) or the mean distance from the Earth to the Sun can also be used. An A.U. is equivalent to 149 598 000 kilometers.
Can any galaxies besides our own be seen with the naked eye?
With some luck, good eyesight, and a very dark sky, there are one or two nearby galaxies that can be seen by the naked eye as small splotches.
A nearby galaxy?
Horse Isle Answer: Andromeda~Callileeno on Chestnut ServerThe Canis Major Dwarf Galaxy is the closest galaxy to us but the Andromeda Galaxy is th largest spiral galaxy near us.Look on this site for more info...http://www.brighthub.com/science/space/articles/41000.aspx
How do the speeds at which most nearby galaxies are moving away from the earth compare to the speeds of distant galaxies that are moving away from earth?
Distant galaxies are moving away from Earth at faster speeds compared to nearby galaxies. This is due to the expansion of the universe, where galaxies farther away experience a greater redshift, indicating faster recession velocities. This relationship is described by Hubble's Law, which states that the recessional velocity of a galaxy is directly proportional to its distance from us.
What is the distance between stars and glaxies?
Typical distances between nearby stars are in the order of a few light-years; for example, the closest star to Earth (after our Sun) is at a distance of about 4.2 light-years. Typical distances between nearby galaxies are in the order of a hundred-thousand light-years, to several million light-years. For example, the Andromeda Galaxy is at a distance of about 3 million light-years; while that's the closest large galaxy, there are several dwarf galaxies that are closer to us.
Why isn't the look-back time important among nearby galaxies?
Galaxies change very slowly.
What other galaxies do you have in unniverse?
For a start, look up "Local Group" in the Wikipedia. This will show you a list of nearby galaxies.
In which direction are nearby all galaxies moving relative to earth?
Nearly all galaxies are moving away from our galaxie and planet.
Which astronomer argued that the milky way is huge and other galaxies are merely small nearby companions?
Shapley is the astronomer that argued that the milky way is huge and other galaxies are merely small nearby companions.
What is the name of a nearby galaxy?
The Large Magellanic Cloud and the Small Magellanic Cloud are two nearby dwarf galaxies. Two larger galaxies that are still part of our local group are the Andromeda Galaxy (a.k.a. M31), and the Triangulum Galaxy. All of the above-named galaxies can be seen with the naked eye.
What has the author Amos Yahil written?
Amos Yahil has written: 'The structure of the nearby universe traced by the IRAS galaxies' -- subject(s): Astronomy, Galaxies
What has the author Harold D Ables written?
Harold D. Ables has written: 'Optical study of nearby galaxies' -- subject(s): Astronomical photometry, Galaxies
What has the author Pieter Samuel Mulder written?
Pieter Samuel Mulder has written: 'Structure and kinematics of two nearby disc galaxies' -- subject(s): Spiral galaxies
Nearby galaxies may not show a redshift?
Nearby galaxies won't show much of a redshift, because they aren't moving away very quickly - or at all. For example, the Andromeda Galaxy, M31, is actually getting closer - and will collide with the Milky Way in about 3 billion years.
How many galaxies are approaching milky way galaxy and how many are moving away related to the cosmological red shift?
Most galaxies are moving away from us. Only a few galaxies, which are nearby, are moving towards us.
