Astronomers have found 1,284 candidate exoplanets with less than 1% odds of being a false positive.
Billions and Billions
There are likely 500 billion galaxies in the observable universe, so there may be a sextillion planets similar to ours. Sextillion as in 1 with 21 zeros after it.
One in a Billion
We now have more than a thousand confirmed exoplanets, many of which are from Kepler data. This means we have enough planets to run a bit of statistics, and it leads to some interesting results.
Five is a Magic Number
When we talk about certainty in physics, we often use the statical measure of 5 sigma, which means there is less than one in a million chance that a result happened randomly.