No i dont believe there are et's out there no matter how big space is.
I know for a fact that if we were not alone there would of been some form of evidence through the age of man.
mmmm ok....
If their technology evolved at the same speed as ours then the would also only be able to explore a small bit of a backyard in the universe.....
Lol we cant even travel to the nearest star yet (the sun)....rofl Light year as in how far light travels in a year......+- 300000 km/second iow, A light-year or light year (symbol: ly) is a unit of measurement of length, equal to just under ten trillion kilometres.....
The current, observable universe has been
determined to have a width of 156 billion light years, with an error of less than 1%, by the latest deep-space telescope WMAP. At first, it might seem impossible that scientists are so sure of this astronomical measurement, but this figure has been narrowed by years of research and determined by several paths of inquiry. Also, the size of the universe is intimately dependent on its shape, age, acceleration, and total mass, so we are very confident in this figure.
So we have seen not even a distance of 8 light min away.
lol ffs man so we have explored less then 0.000 000 0001 %
I think there is a slight chance that we might not be alone
Sources : wiki and
http://www.wisegeek.com/how-big-is-the-universe.htm