[Credit & Licence: Planetary Habitability Laboratory (UPR Arecibo)]
Venus & Mars also orbit in or near the Habitable (”Goldilocks”) Zone of their parent star.
https://www.youtube.com/watch?v=JnWyPIzTOTw
Privileged Planet (Chapter 1 of 12)
On the chart you instantly notice that Earth is the smallest of all those planets.
I’ll guess that gravity might limit the optimal size of living things on many of those planets.
I wonder if self-propelled flight is possible on some of those really large planets?
I always enjoy your posts of NASA photos. Maybe UFO’s and aliens from space are real.
A show about possible alien earths on the Science channel at 10 tonight.
And not a one of them has a decent cup of coffee. Sure, a couple of them have a decent chicken fried steak, but good coffee? Nope. They kept offering me Tang, but I told them I wanted coffee. And yeah, a little cream and sugar, too. How hard is that? Build big space battle carriers, but can’t come up with a good cup a Joe. Pathetic.
Gee, with Obama around our planet is barely habitable anymore.