Now & Then
Astronomical Division
The Astronomer of Nininger writes: “Subject: Marvelous Fantastical Time Machine.
“Carl Sagan was known for saying that there are ‘billions and billions’ of stars out there. That’s a lot of stars.
“Our sun is one of those billions and billions of stars, itself in no way remarkable. Orbiting with it, quite far out, around the center of our galaxy, are eight tiny planets. (Get over it; Pluto is not a planet.) Other stars have planets, too. In fact, today we know with certainty about the existence of thousands of exosolar planets — those orbiting other stars. This may in fact be the norm. Searches for these mysterious planets have been nurtured by our search for life and the desire — or maybe, instead, the intimate need — to know whether other living beings inhabit them. Are we alone?
Continue reading “How might we better understand ourselves? Look as far into the past as we can?”