On Friday, June 29, 2018 at 3:19:38 AM UTC+1, palsing wrote:
On Thursday, June 28, 2018 at 2:03:02 PM UTC-7, Gerald Kelleher wrote:
On Thursday, June 28, 2018 at 9:19:54 PM UTC+1, palsing wrote:


Do you know what else you could see from Saturn?

Anyone, at least with common sense, could have made the observation that we extract the information that we along with the other planets travel around the Sun by assigning relevance to different aspects like phases for a faster moving planet or the temporary falling behind in view (direct/retrograde motion) that is easily discernible for the further out planets -

https://apod.nasa.gov/apod/ap011220.html

People must imagine that these observations must come with some sort of formal decorum when really they pop up out of the blue and the astronomer takes notice. Nobody pointed out before that observations from Mercury wouldn't show phases of any of the other planets while observations from Venus would show phases of Mercury but even when people seem hard to please nowadays, these things delight those who can appreciate them for their newness.

It may be 'newness' to you, but to many of us, it is not. Many of us have been aware of your new perspectives for a very long time. Congratulations to you for finally understanding some of these little details.


Easy to be nonplussed despite the individual effort to untangle different perspectives which caused perceptual obstructions including the awkward direct/retrograde motion of the faster moving Venus -

https://www.youtube.com/watch?v=IYYwNvjr7Lg

It means that the daily change in position of the background stars using a central/stationary Sun as a foreground reference is proof of the Earth's orbital motion and essential in making sense of Venus phases and its smaller orbital circumference and faster motion around the Sun. I would show you the animation but Sky&Telescope have pulled the graphic from YouTube so the images will suffice -

http://www.insideastronomy.com/uploa...0_7_128459.jpg

It is no mean feat to provide proof of the Earth's orbital motion alone minus any effect of daily rotation including circumpolar motion of the stars. It is as though you have to step off that rotating celestial sphere carousel to enjoy motions of the planets and the Earth as they really are, it may not be for you but others can do better.