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Approximate sizes of the planets relative to each other. Outward from the Sun, the planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Jupiter's diameter is about 11 times that of the Earth's and the Sun's diameter is about 10 times Jupiter's. The planets are not shown at the appropriate distance from the Sun.
Orrery. A small orrery showing Earth and the inner planets. An orrery is a mechanical model of the Solar System that illustrates or predicts the relative positions and motions of the planets and moons, usually according to the heliocentric model. It may also represent the relative sizes of these bodies; however, since accurate scaling is often ...
The outer planets' orbits are chaotic over longer timescales, with a Lyapunov time in the range of 2–230 million years. [104] In all cases, this means that the position of a planet along its orbit ultimately becomes impossible to predict with any certainty (so, for example, the timing of winter and summer becomes uncertain).
VGA Planets is a multi-player space strategy war game originally released in 1992. The game simulates combat in space between galactic scale empires. It follows the 4X game (eXplore, eXpand, eXploit and eXterminate) model: The players start with a home world, and have to build spaceships, explore the galaxy, colonize planets, mine minerals, build up their industry.
The scale of the planets is the same as the scale between them, and the planets are represented by everyday objects; the Earth is a peppercorn, Jupiter is a walnut, and Neptune is a coffee bean. (dismantled) Saint-Louis-du-Ha! Ha!, Quebec: 1:10,000,000,000 0.1 m 0.1 cm 15 m 0.6 km (dismantled) (est. 1985) Lafayette Walk Detroit, Michigan
Size of this PNG preview of this SVG file: 512 × 288 pixels. Other resolutions: 320 × 180 pixels | 640 × 360 pixels | 1,024 × 576 pixels | 1,280 × 720 pixels | 2,560 × 1,440 pixels. Original file (SVG file, nominally 512 × 288 pixels, file size: 88 KB) This is a file from the Wikimedia Commons. Information from its description page ...
On a human time scale, these perturbations can be accounted for using numerical models, [52]: 9-6 but the planetary system can change chaotically over billions of years. [ 53 ] The angular momentum of the Solar System is a measure of the total amount of orbital and rotational momentum possessed by all its moving components. [ 54 ]
1522 – First circumnavigation of the world by Magellan - Elcano expedition shows that the Earth is, in effect, a sphere. [69] 1543 – Copernicus publishes his heliocentric theory in De revolutionibus orbium coelestium. [70] 1576 – Tycho Brahe founds the first modern astronomical observatory in modern Europe, Uraniborg.