Planet Sizes - Comparison Images and Video

There are eight planets in the Solar System. In increasing distance from the Sun, they are:

1. ☿ Mercury
2. ♀ Venus
3. ⊕ Earth
4. ♂ Mars
5. ♃ Jupiter
6. ♄ Saturn
7. ♅ Uranus
8. ♆ Neptune

Jupiter is the largest, at 318 Earth masses, while Mercury is smallest, at 0.055 Earth masses.
Antares is the 15th brightest star in the sky. It is more than 1000 light years away.

Planet Size Images

	Equatorial			Mean			Rotation		Incl.
	Diam. (km)	Mass		Density	Gravity		Period (days)		(deg.)
Sun	1,392,000	332,946	.0	1.41	27	.9	25 - 35 *
Mercury	4,878	0	.055274	5.43	0	.38	58	.646	0	.0
Venus	12,104	0	.815005	5.24	0	.91	243	.017	177	.3
Earth	12,756	1		5.52	1		0	.9973	23	.4
Mars	6,787	0	.107447	3.94	0	.38	1	.0260	25	.2
Jupiter	142,800	317	.833	1.33	2	.54	0	.4101 **	3	.1
Saturn	120,000	95	.159	0.70	1	.08	0	.4440	26	.7
Uranus	51,200	14	.500	1.30	0	.91	0	.718	97	.9
Neptune	48,600	17	.204	1.76	1	.19	0	.768	29	.6
Pluto	2,300	0	.0026	1.1?	0	.05	6	.3867	94	.

Moons

Mass relative to Earth’s mass, which is 5.974 x 10²⁴ kg.

Asteroids

Gravity and escape speed at the pole, at the visible surface.

Kuiper Belt Objects

Inclination of the equator relative to the plane of the orbit.

Comets

The Sun’s surface rotates faster at the equator than at the poles.

At the equator, where Jupiter’s atmosphere rotates fastest.

The planets of the Solar System can be divided into categories based on their composition:

Terrestrials: Planets that are similar to Earth, with bodies largely composed of rock: Mercury, Venus, Earth and Mars.
Gas giants: Planets with a composition largely made up of gaseous material and are significantly more massive than terrestrials: Jupiter, Saturn, Uranus, Neptune. Ice giants, comprising Uranus and Neptune, are a sub-class of gas giants, distinguished from gas giants by their significantly lower mass, and by depletion in hydrogen and helium in their atmospheres together with a significantly higher proportion of rock and ice.

Planet sizes video