Great and gloriousBeing Human
Our solar system is very big.
Voyager has taken some thirty five years to reach the edge of it, travelling at 10.5 mi/s.
It’s now between solar systems, and will take 10000 years to reach the next one.
In our galaxy there 200 billion solar systems. But ours is just one galaxy in a much larger universe.
In the whole Universe there are the hundred billion galaxies.
It’s Carl Sagan’s birthday.
If you’ve not watched Cosmos, I urge you to. He’s like an infinitely better Brian Cox, and with a deeply philosophical understanding, and and eloquent and compelling wisdom.