CSS 3D Solar System
codepen.io
codepen.io
According to that page the solar system's radius is ~6000000000km. Lets assume a 4096px wide desktop. Each pixel is ~1500000km. The Sun's radius is ~700000km, so definitely sub-pixel size.
That said, here's a model with proper proportions of distance: http://www.solarsystemscope.com/ - Flash required, click anywhere, click on the gear icon to the left to select realistic size and model. Zoom slider is to the right. Note, the sizes and colors are wrong, most planets would be pretty much invisible in a realistic model.
Here's a neat non-interactive one from NASA: http://space.jpl.nasa.gov/
The nasa one gives me this: http://i.imgur.com/E6JW3Ks.jpg
Too bad they show all those stars in the background. So its a bit hard to say what is what. But it looks like the sun and the planets are quite visible. But are the proportions really correct? It looks like the sun is not much bigger then the plantes.
(1) Correct proportions of the distances between objects (namely the planets, planetoids, and the Sun), and (2) the correct proportions of the objects themselves.
The links (A) http://www.solarsystemscope.com/ and (B) http://space.jpl.nasa.gov/ show correct proportionality in DISTANCES BETWEEN OBJECTS but NOT the objects themselves.
For correct proportionality for both the distances and the objects themselves, see http://joshworth.com/dev/pixelspace/pixelspace_solarsystem.h...
The problem with http://codepen.io/juliangarnier/pen/idhuG is that both the distances between objects and the objects themselves are not proportionally correct.
Bringing the solar system to a 1920px screen, I would assume that not even the sun would be visible...
The furthest planet is Neptune, and that's about 30 times as far from the Sun as the Earth. Suddenly you need a screen that's nearly 3/4 million pixels wide to show Neptune's orbit. Only 360,000 pixels if you only want to show the distance from the Sun to Neptune, and not the full orbit.
You can look up the comparative sizes of the planets and the Sun, but that gives you an idea.
It's not just css, but uses NASA data and does super accurate simulation, like predict-the-solar-eclipse-date kind of accurate...