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planetes

 

 

 

 

Planet Mass Diameter Density Rotation Distance Revolution Eccentricity Inclination Axis tilt
(x M Earth ) (km) (g/cm 3 ) (A.U.) (deg) (deg)
Mercury 0.0553 4880 5.43 58.81d 0.387 87.97d 0.2056 7.0 0.1
Venus 0.815 12,104 5.20 243.69d 0.723 224.70d 0.0068 3.4 177.3
Earth 1.000 12,742 5.52 23.9345h 1.000 365.26d 0.0167 0.00 23.45
Mars 0.107 6780 3.93 24.623h 1.524 686.98d 0.0934 1.85 25.19
Jupiter 317.83 139,822 1.33 9.925h 5.203 11.86y 0.04845 1.305 3.12
Saturn 95.162 116,464 0.687 10.50h 9.539 29.46y 0.05565 2.489 26.73
Uranus 14.536 50,724 1.32 17.24h 19.182 84.01y 0.0472 0.773 97.86
Neptune 17.147 49,248 1.64 16.11h 30.06 164.79y 0.00858 1.773 29.56
Pluto 0.0021 2274 2.05 6.405d 39.53 247.68y 0.2482 17.15 122.46

 

The solar system may be defined as consisting of those objects that are governed by the Sun's gravitational field. It extends out to about two light years (a light year is the distance light travels in one year and therefore equals about 9.5 x 10 15 m or 63,000 Astronomical Units where 1 AU is the average Earth-Sun separation; the closest star, Proxima Centauri, is just over 4 light years away).

However, the most distant known objects, the long-period comets, appear to originate from between 1,000 and 30,000 AU away although we never actually detect them until they enter the inner regions of the solar system. Pluto's orbit extends almost 50 AU from the Sun at its most distant.

The solar system is composed of a star, 9 planets, various satellites of these planets, small bodies (comets, asteroids & meteorites) and an interplanetary medium consisting of dust, gas and high-energy particles. Note that about 99.85% of the mass of the solar system is actually accounted for by the Sun.

 

 

 

 

 

 

 

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