October 2016
October 2016
The Dark Side of the Cosmos
Laura Maguire
06
Oct 2016
What a weird and wonderful cosmos we live in! Here’s an astounding fact. If you take all of the ordinary objects you can see, from tables and chairs to all the stars and planets in the universe, you will have accounted for less than 5% of the universe’s total mass-energy. The other 95%? That’s invisible stuff like dark matter and dark energy.
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John Perry
22
Oct 2016
Throughout human history, every time we think we know what the universe is, it turns out that there is not just one of those things, but a lot of them. First we thought the universe was Earth, a sun and a moon, and a sky with a lot of mysterious points of lights. Then there turned out to be a number of planets with their own moons. Then a lot of suns, with their own planets: a lot of solar systems.
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