facts about space that will rock your world

2. Space is completely silent

Sound waves need a medium to travel through. Since there is no atmosphere in the vacuum of space, the realm between stars will always be eerily silent.

That said, worlds with atmospheres and air pressure do allow sound to travel, hence why there’s plenty of noise on Earth and likely other planets as well.

3. There is an uncountable number of stars in the known universe

We basically have no idea how many stars there are in the universe. Right now we use our estimate of how many stars there are in our own galaxy, the Milky Way. We then multiply that number by the best guesstimate of the number of galaxies in the universe. After all that math, NASA can only confidently say that say there all zillions of uncountable stars. A zillion is any uncountable amount.

An Australian National University study put their estimate at 70 sextillion. Put another way, that’s 70,000 million million million.

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