-
Random Facts
- What are contrails and how do they form?
- How does a Slinky walk down stairs?
- Are There Any Dessert Countries?
- How Did Mathew Brady Become The Father of Photojournalism?
- Is the Story of Joan of Arc True?
- Did Games and Graffiti Exist in the Stone Age?
- How Did the Greeks Figure Out the Size of the Earth?
- Why Did The Pakistan Movement Create The Independant State Of Pakistan?
- How Do Fish Eggs Change Into Fish?
- What Sport Is Played With A Ball made From Willow Root?
-
Recent Comments
- keerthana reddy on Who invented Money and why?
- keerthana on Who invented Money and why?
- Bryan L. Allen on When was the first human-powered airplane flight?
- Harvey on How Did Eggs and Rabbits Become Associated with the Celebration of Easter?
- Tim tool man on Where is the Hottest Place on Earth?
- Bob Cahill on Are areas near the equator always warm even at higher elevations?
- chris on Who Invented Chewing Gum?
- mary on History of Umbrellas
- Abel Robinault on How Does a Clam Eat?
- chakaloso on How Does a Radio Work?
-
Tags
-
-
Pages
How Big Is the Universe?
No one can be certain, because no one can see the entire universe. But so far, the farthest star from earth that scientists have found is about ten billion light-years away.
Since one light-year is equal to six trillion miles, then the farthest star from earth that we know about is around 60,000,000,000,000,000,000,000 miles away!
But the universe must be much bigger than that. Suppose that the earth were at one edge of the universe and the very distant star was at the other edge. Then the universe would be ten billion light- years across.
But we know that the earth isn’t at the edge of the universe, because we can look in all directions and see stars that are many millions of miles away. So all we know for sure is that the universe is at least ten billion light-years across!