Your response should be 3-5 sentences minimum with justification for your answer. Astronomers estimate that the universe has about 100 billions of galaxies, each of which has about 100 billions stars. Given there are so many stars in the Universe, why isn't our night sky completely filled with starlight?

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and also please delete my question

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called