When his eight years as President of the United States ended on January 20th, 1953, newly-private citizen Harry Truman took the train home to Independence, Missouri.
He had no secret service protection, mingled with other passengers, and his only income was an army pension.
When we talk about the enormity of the cosmos💫, it’s easy to toss out big numbers, but far hardert to wrap our minds around just how large, how far and how numerous celestial bodies like #exoplanets really are.
So. How big is the Milky Way galaxy?
https://t.co/a2cGvNeJpF