My physics bias would like to see earth forming while it's constituents were orbiting around the sun.
In any case, nice visualization.
Show HN: Gravity – Interactive solar-system simulator, from Newton to Einstein
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Re: Show HN: Gravity – Interactive solar-system simulator, from Newton to Einstein
#12Earlier quoted context omitted.
It should be better now
It works pretty well on iPhone, except the descriptive text fills most of the bottom half of the screen, overlapping the sim which is centered on the screen. If the sim were instead centered on the free space (the top half of the screen) it’d be perfect.
There a toggle button to show hide description if you missed it
Re: Show HN: Gravity – Interactive solar-system simulator, from Newton to Einstein
#13My physics bias would like to see earth forming while it's constituents were orbiting around the sun. In any case, nice visualization.
that probably happened a few times as well we "stolen" planets or mass from other star systems in the same baby nursery as our sun
there is also likely a planet that passed through and yanked away a lot of debris, most of the simulations for tilt etc. don't work without the mystery missing planet
I could watch PBS Space Time all day for that kind of stuff, often do letting it play in the background on repeat, so much better than the news
* https://www.youtube.com/@pbsspacetime/search?query=planets
Dr. Becky is also awesome
Re: Show HN: Gravity – Interactive solar-system simulator, from Newton to Einstein
#14the way the original mathematicians figured all this out absolutely melts my brain
no computers, no calculators, barely working telescopes looking at the moons orbiting Jupiter
(don't be limited by episode title, lots of amazing astrophysics in there)
Re: Show HN: Gravity – Interactive solar-system simulator, from Newton to Einstein
#15[dead]
Re: Show HN: Gravity – Interactive solar-system simulator, from Newton to Einstein
#16Very nice, fairly efficient too.
I don't like the explicit split of Newtonian and relativistic gravity, this is often how it's presented in educational content, but it creates too much confusion; for instance it gives the illusion that they are somehow separate theories even though Newtonian gravity is a limiting case of Einsteinian gravity when v Lastly, you should consider rendering spacetime similar to Alessandro Roussels spacetime visualization https://www.youtube.com/watch?v=wrwgIjBUYVc; probably the best and most innovative one I've seen.
Re: Show HN: Gravity – Interactive solar-system simulator, from Newton to Einstein
#17That doesn’t look right: in the 7th panel (too fast it escapes) the force and velocity of earth are constant? 0_o
Re: Show HN: Gravity – Interactive solar-system simulator, from Newton to Einstein
#18This is nice. I did laugh at how the Gravity built the Earth, with a tiny North America and all, and then as more mass was accumulated, North America got to get bigger and bigger and bigger!
Ha ha, you're looking at the man behind the curtain.
(I thought the same: suspecting it's a kind of crossfade between accreting bodies and finished Earth.)
Re: Show HN: Gravity – Interactive solar-system simulator, from Newton to Einstein
#19I really liked your animations, but isn't step 14 incorrect? Earth's axis processes, but on a very long timescale. In the span of a day, the axis should be effectively stationary. That's why its the rotation 'axis' - it's the fixed line it rotates about. That's why Polaris is the north star: the axis of rotation points effectively directly at it at all times no matter the season. During summer in the northern hemisphere, the tilt is towards the sun, giving us more direct heating, and in the winter it's away from the sun. This isn't due to the axis moving, but due to the axis' relative position changing throughout earth's orbit around the sun.
Re: Show HN: Gravity – Interactive solar-system simulator, from Newton to Einstein
#20My physics bias would like to see earth forming while it's constituents were orbiting around the sun. In any case, nice visualization.
i had the same thought. likewise the sun formed from particles circling around the galactic core. that matters later when it is explained how the sun is moving.