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“Stars have their own proper motions" is not an easy fact to prove. . .” No, proper motions are well known, https://www.britannica.com/science/proper-motion#:~
by nyc111 5y ago
“Stars have their own proper motions" is not an easy fact to prove. . .”
No, proper motions are well known, https://www.britannica.com/science/proper-motion#:~:text=proper%20motion%2C%20in%20astronomy%2C%20the,distant%20background%20stars%20or%20galaxies https://www.britannica.com/science/proper-motion#:~:text=pro....
So we must further assume that a star attached to a crystal sphere will have a separate motion which also need to be explained.
- IanCal 5y agoIt's well known that the earth rotates too though.
- sandworm101 5y ago>> a star attached to a crystal sphere will have a separate motion Two spheres. Proper motion can be explained completely if we allow each star to exist on its own crystal sphere. Layers of spheres could also extend great distances. Maybe the universe is vast, but it is all spheres. What does disprove spheres are collisions of objects having different proper motions.
- nyc111 5y ago> Two spheres. Proper motion can be explained completely if we allow each star to exist on its own crystal sphere. Wow! I can believe we are discussing in the age of Hubble space telecope and Webb etc. the existence of crystal spheres and how they can explain motions of stars. I don't believe crystal spheres exist but I respect your belief in them. To me they are an unnecessary and cumbursome explanation.
- FredPret 5y agoNobody believes in crystal spheres. The point is they are not so trivial to disprove.
- sandworm101 5y agoAs cumbersome as unobserved massive particles representing the majority of matter in the universe?