How small is earth compared to the universe?
Close to non-existent
Consider that the universe is 45 billion light years across. A single light year is 5.8 trillion miles or 9.4 trillion kilometers. Therefor the universe is 45 billion times 5.8 or 9.4 trillion miles or kilometers. And the earth is 7,900 miles in diameter. You would have a tough time seeing the earth from the nearest star and impossible from even the nearest galaxy.