Will DARPA Build a Nuclear Space Force?
Space is big. Like big enough to boggle the mind.
To get an idea of just how big space is, try scrolling across this "tediously accurate scale model of the solar system." (Expect to spend your first few minutes just reaching the asteroid belt -- and still only be about 1/10 of the way to Pluto.)
In real life, it took NASA's Perseverance mission only seven months to make the relatively modest hop from Earth to Mars. But the Blue Marble and the Red Planet only orbit that close together once every couple of years. Pick the wrong departure date, and it could take you nearly a year to reach Mars.
Source Fool.com
