Space

#303 Where does space end?

Where does space end? There is no way of knowing, but there is a horizon 46 billion light years away that we can’t see past. There are five different possibilities. That the universe is infinite. That the universe wraps in on itself. That there is no “outside” to the universe. That our universe is embedded

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#302 Where does space start?

Where does space start? Technically, it starts at 100 km, but there are five different definitions. Space begins at the Kármán Line, which is 100 kilometers above sea level. There is obviously no sign that says, “Welcome to Space!”, so any line that shows the boundary of space has to be arbitrary. The reasoning behind

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#270 What was the Tunguska event?

I learned this today. The Tunguska event was probably a meteor air burst that exploded over Eastern Siberia on June 30th, 1908. Today, as of writing, it is the 114th anniversary of the Tunguska event. Early in the morning of Tuesday, June 30th, 1908, there was a bluish light almost as bright as the sun,

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