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One estimate is that there are 1010 stars in the Milky Way galaxy, and that there are 1010 galaxies in the universe. Assuming that the number of stars in the Milky Way is the average number, how many stars are in the universe?
I assume that your 1010 means $10^10$. Then the number of stars is simply $10^10*10^10=10^20$.
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Could the ages of globular clusters be used to place a limit on the maximum value of the Hubble constant?
The Hubble constant describes the . The Hubble Constant was revealed when Edwin hubble found a correlation between the distance of a galaxy and its velocity. He found a correlation...
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Edwin Hubble discovered the universe was expanding by measuring the light of distant stars, and by showing that those distant stars were moving further away from the earth. If this is so, then why is the Andromeda Galaxy moving closer to us?
Andromeda is being pulled apart by the expanding universe. But the gravity between the Milky Way and Andromeda is strong enough to overcome this expansive force. Gravity is pretty...
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Why are there so many dwarf stars (red and white) among the nearest stars, but none among the brightest stars?
There is a different story for each type of dwarf star that we cannot see. if you are considering Proxima-Centauri, Proxima-Centauri though is the closest Star to but at the...
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Is it significant when stars form in clusters? Why or why not?
It is a long wait for centuries to detect relative velocity of one star with respect to another in proximity. Several young stars from clusters, upon maturity, drift away...
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Why can the lives of close binary stars differ from those of single stars?
In a binary star system the larger star evolves in to a red giant and then collapses into a white dwarf. Some time later the second star will become a...
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Why are Cepheid variable stars important to astronomers? How is the information they impart any more or less useful than using stellar parallax?
If we can observe how long it takes for a Cepheid to go from bright, to dim, back to bright, we can use that to tell exactly how bight the...
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What causes blue stragglers in globular clusters?
The stars in globular clusters follow a distinct pattern on the Hertzsprung Russell diagram. Blue stragglers don't follow the pattern as they are too big. The most likely theory is...
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What are globular clusters?
Explaining in the form of points:- =>They are a collection of densely packed ancient stars. =>There are 150 million clusters in the Milky Way. =>Contain thousands or even millions of...
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Would you expect to find supernova remnants inside globular clusters? Why?
A type 1a supernova is possible in a globular cluster. Stars ins globular cluster evolve into a white dwarfs. If a white dwarf is in a close binary with a...
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