There's little doubt that Wimbledon is the most prestigious tennis tournament of the year, featuring the best players i... Mon Jun 29, 2015 | pcadvisor.co.uk. Wimbledon tennis championships 2015 is about to begin and you can watch the whole thing onine via a few different websi...
Multiply the number of seconds in one year by the number of kilometers (or miles) that light travels in one second, and there you have it: one light-year. Itâs about 9.5 trillion kilometers (5.88 trillion miles).
Current observations suggest that the Universe is about 13.7 billion years old. We know that light takes time to travel, so that if we observe an object that is 13 billion light years away, then that light has been traveling towards us for 13 billion years.