The Big Bang
for those of you who want to learn
Galaxy creation
galaxy creation or the first galaxies were created around the big bang so 13 to 14 billion years ago.
A giant cloud of dust and gas collapsed on its self which allowed giant clumps of matter to form a lot of the first galaxies were spiral that then later changed into the other types of galaxies (elliptical,irregular, and S0) way later on in life. Galaxies will still continue to evolve and change because the will get swallowed up and swallowed other galaxies as well. For example our milky way may have swallowed up to 2 other galaxies. We can estimate a galaxy's age by its rate of expansion. galaxies aren't just random on their placement in the universe they usually tend to be in galactic clusters the galaxies within these clusters are pulled by the same gravitational forces and they influence each other. Rich clusters like the Virgo super cluster contain more than 1000 galaxies on the other hand poor clusters are lucky to have 50 galaxies for example the local group has 50 so less than 1000 galaxies. There is an intergalactic medium which is the space between galaxies and clusters of galaxies. It isn't necessarily empty it contains a small amount of gas in it. Edwin Hubble (a astronomer) in 1929 published a chart of Doppler-shifts which he called his Hubble Law. This law states that Velocity of recession (v) is proportional to galactic distance (d) and (H) Hubble is always constant at 70 kilometers per second so a formula would be V=H*d.
A giant cloud of dust and gas collapsed on its self which allowed giant clumps of matter to form a lot of the first galaxies were spiral that then later changed into the other types of galaxies (elliptical,irregular, and S0) way later on in life. Galaxies will still continue to evolve and change because the will get swallowed up and swallowed other galaxies as well. For example our milky way may have swallowed up to 2 other galaxies. We can estimate a galaxy's age by its rate of expansion. galaxies aren't just random on their placement in the universe they usually tend to be in galactic clusters the galaxies within these clusters are pulled by the same gravitational forces and they influence each other. Rich clusters like the Virgo super cluster contain more than 1000 galaxies on the other hand poor clusters are lucky to have 50 galaxies for example the local group has 50 so less than 1000 galaxies. There is an intergalactic medium which is the space between galaxies and clusters of galaxies. It isn't necessarily empty it contains a small amount of gas in it. Edwin Hubble (a astronomer) in 1929 published a chart of Doppler-shifts which he called his Hubble Law. This law states that Velocity of recession (v) is proportional to galactic distance (d) and (H) Hubble is always constant at 70 kilometers per second so a formula would be V=H*d.
Questions
1.Who created Hubble's Law?
2.Will Galaxies ever evolve into other types of galaxies?
4.what is the formula for Hubble law?
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5. Does the Virgo super cluster have more or less than 1000 galaxies?