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@chrimony claims that he can calculate exactly how far a star at 500 light years away should appear to move throughout the night, but he refuses to do so. I wonder why?

submitted by McNasty to whatever 2 monthsMar 19, 2024 15:33:33 ago (+4/-4)     (whatever)

If you're going to make a mathematical claim, you need to show the work.

It's like we're watching a horse race and I'm not allowed to tell him who won until I do an equation that shows him how fast one of the horses in the race should be running.

Motion Parallax
Motion parallax refers to the fact that objects moving at a constant speed across the frame will appear to move a greater amount if they are closer to an observer (or camera) than they would if they were at a greater distance. This phenomenon is true whether it is the object itself that is moving or the observer/camera that is moving relative to the object. The reason for this effect has to do with the amount of distance the object moves as compared with the percentage of the camera's field of view that it moves across. An example is shown in Figure 2.29. An object that is 100 m away may move 20 m in a certain direction and only move across 25% of the field of view, yet the same 20 m displacement in an object that is only 40 m away will cause the object to move completely out of frame.

https://files.catbox.moe/b2stle.jpg

Stars show no motion Parallax.

https://files.catbox.moe/dipkpn.png


6 comments block


[ - ] chrimony 3 points 2 monthsMar 19, 2024 16:25:56 ago (+4/-1)

[ - ] McNasty [op] 1 point 2 monthsMar 19, 2024 16:28:47 ago (+2/-1)

Thanks for posting all those. Definitely didn't feel like doing it. But yeah, obviously you're making a claim that you know nothing about. Show me there's an equation to determine how far a stars apparent movement will be yet you haven't shown me your work.

Me: Stars show no Parallax relative to each other proves they have no depth.

You: reeeeeeeeee. There's an equation that you don't know.

Ok. Tell me about it.

[ - ] chrimony 1 point 2 monthsMar 19, 2024 16:31:52 ago (+2/-1)

Ok. Tell me about it.

You'll have it within the next 12 hours.

[ - ] McNasty [op] 0 points 2 monthsMar 19, 2024 16:37:57 ago (+2/-2)

You'll have it within the next 12 hours.

So you don't need an equation? Cool. You only need to observe? I get it. It's like watching a horse race. We don't need to know how fast the horses are running to know that some horses are running faster than others. Except the horses in your race all cross the finish line at the same time.

[ - ] chrimony 0 points 2 monthsMar 19, 2024 23:38:36 ago (+1/-1)

[ - ] McNasty [op] 0 points 2 monthsMar 19, 2024 16:11:48 ago (+2/-2)

What's a matter @chrimony ? You don't want to talk about your formula now?