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1 The Universe is 13.82 billion years old. 2  The Universe is expanding a bit slower than we expected. 3  The Universe is 4.9 percent normal matter, 26.8 percent dark matter, and 68.3 percent dark energy.  The Universe is lopsided. Just a bit, just a hint, but that has profound implications.
Because the universe was born 13.8 billion years ago, we can only observe objects up to a certain distance from Earth â light from more distant objects hasnât had time to reach us yet. To answer âhow many stars are there,â we must limit the discussion to what we can observe.Astronomers estimate that the observable universe has more than 100 billion galaxies. Our own Milky Way is home to around 300 billion stars, but itâs not representative of galaxies in general.The Milky Way is a titan compared to abundant but faint dwarf galaxies, and it in turn is dwarfed by rare giant elliptical galaxies, which can be 20 times more massive.ecause the universe was born 13.8 billion years ago, we can only observe objects up to a certain distance from Earth â light from more distant objects hasnât had time to reach us yet. To answer âhow many stars are there,â we must limit the discussion to what we can observe.