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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
All the stars and galaxies are in this?
The universe contains all the stars and galaxies in existence. Stars are massive celestial bodies that emit light and heat, while galaxies are vast systems of stars, gas, dust, and dark matter bound together by gravity. Together, they make up the incredible tapestry of the cosmos.
How is light years used in science measurement?
A light year is the distance light travels in a year. That is roughly 6,000,000,000,000 miles (six trillion miles). Thus such a unit is used only to measure the largest distances, those between stars and galaxies.
What can you infer about the size of the universe from your knowledge about galaxies?
From our knowledge about galaxies, we can infer that the universe is vast in size. Galaxies are massive collections of stars, dust, and dark matter, with some containing billions of stars. The sheer number and variety of galaxies observed suggest that the universe is incredibly expansive.
In order of size starting with largest star cluster galaxy universe star planet?
Universe, Cluster, Galaxy, Star, Planet NB: Some stars are smaller than planets.
Why do we measure the movement of stars?
Parallax is the apparent change in position of an object when you look at it from different angles. Astronomers often us parallax to measure distances to nearby stars. This method can be used to determine stars' distances up to 400 light-years from Earth.
What are all stars and galaxies in?
All stars and galaxies are in the universe.
Why do scientists measure distances to stars and observe how stars interact with one another to?
Scientists measure distances to stars to determine their exact positions in the sky and their relationships with other astronomical objects. By observing how stars interact with each other, scientists can understand the dynamics of star systems, galaxies, and the Universe as a whole, helping to unravel the mysteries of celestial phenomena.
What pairs of objects are the farthest apart?
The pair of objects that are the farthest apart in the universe are galaxies. Galaxies are clusters of billions of stars and are separated by vast distances in the universe. The observable universe is about 93 billion light-years in diameter, so galaxies within it can be incredibly far apart.
What has all the stars and galaxies in them?
the universe is made up of galaxies
What are all the stars and galaxies in?
The Universe.
In which system(s) are the distances between the objects the largest compared to the size of the objects?
In the solar system, the distances between planets are much larger compared to the size of the planets themselves. In the universe, the distances between galaxies are also vast compared to the sizes of the galaxies.
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
Which objects began to form in your universe earlier stars or galaxies?
Galaxies are the massive collection of stars. Therefore galaxies could not have formed without stars.
What is stars hometown?
in the space or galaxies or in the universe
How meany galaxies and stars are there in this universe?
In the VISIBLE UNIVERSE, there are somewhere in the order of 1011 galaxies; each galaxy on average has 1011 stars, for a total of (very roughly) 1022 stars.
Is gravity the most effective force over long distances?
Yes, gravity is the dominant force over long distances in the universe. It is responsible for the structure of galaxies, the orbits of planets around stars, and the expansion of the universe itself.
