How big is space?


As far as humans can tell, space is infinite; it has no end or borders. Scientists believe that space will always seem infinite to humans for two reasons. First, our investigation of space has never found an edge (or any indications of an edge). Second, measurements show that space is expanding faster and faster, which pushes the edges of the universe  if there are any  ever farther out.

Space is continuing to expand (meaning that all the galaxies are speeding away from the center of the universe) because of the Big Bang's momentum and because of a substance called dark energy. Dark energy occupies the seemingly empty parts of the universe, but it has a strong negative pressure, pushing things away from each other even faster than they would move as a result of the Big Bang. This makes it difficult for humans to measure the farthest reaches of space.

In addition, anything traveling through space  including humans' investigative tools, techniques and measurements  is limited to the fastest possible speed: the speed of light. Because nothing can travel faster than light, there is a limit to how far scientists can explore or understand the universe. The size of the observable universe (the part astronomers could potentially study) is approximately 45.7 billion light-years across.

Q&A Related to "How big is space?"
Outer space, as far as we can see, is around 28 billion light years in diameter. We cannot see any further than our universe is old in the time it takes for light to travel. Scientists
1. Check out unique office design plans that offer innovative ways to use large spaces to house employees. Examine the way space is subdivided in these huge expanses: vertical, horizontal
Depending on the direction observed, the visible universe is tens of billions of light-years in radius. Just the observed part appears to contain billions of galaxies. But the images
The african lion is the largest of the big cats and can weigh over 350 lbs, up to over 500 lbs. They can be as long as seven feet. The females of the species are considerably smaller
Explore this Topic
A car parking space is approximately 4.5 to 5 metres in length of space. Minimum width of space is 2.4 metres while minimum aisle width between two rows of spaces ...
In most cases, the dimensions of a parallel parking space are 8 feet wide by 20 feet long. That is the area in which you will be able to park the actual space ...
The space station is quite big and it looks like a bright star that is slowly revolving against the background of other real stars. Moreover, its huge solar arrays ...
About -  Privacy -  Careers -  Ask Blog -  Mobile -  Help -  Feedback  -  Sitemap  © 2014