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Beyond our solar system  5nvklj





Beyond our solar system  9tpt39

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Beyond our solar system

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Dragon
Dragon
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Beyond our solar system  Empty Re: Beyond our solar system

Post by Dragon Sat Nov 03, 2018 11:53 pm

How can the universe be 93 billion light-years across if it is only 13.8 billion years old?

According to the theory of cosmic inflation, the entire universe’s size is at least 10^23 times larger than the size of the observable universe.


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Beyond our solar system  334pu7m
Dragon
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Beyond our solar system  Empty Re: Beyond our solar system

Post by Dragon Sat Nov 03, 2018 11:54 pm



Cosmic rays with energies greater than 1 billion electron volts (eV) come to us from beyond our solar system. But because these particles -- electrons, protons and atomic nuclei -- all carry an electrical charge, they veer off course whenever they encounter magnetic fields.

This scrambles their paths and masks their origins. Eta Carinae, located about 7,500 light-years away in the southern constellation of Carina, contains a pair of massive stars whose eccentric orbits bring them unusually close every 5.5 years. The stars contain 90 and 30 times the mass of our Sun.


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