PLANETARY SYSTEM.

Nine planets revolve around the sun in the same direction, and the nearest planet to the sun is Mercury. Followed by Venus, Earth, Mars, Saturn, Jupiter, Uranus, Neptune and Pluto respectively.

Endurance crater on Mars.

Ancient Greece Scientists and the Arabs knew the first six planets and then, the planet Neptune was discovered in 1846 and, then Pluto in 1930 lately because of their distance from the sun. Some scientists have predicted the existence of Neptune and Pluto to be discovered and there are also predictions of the existence of other planets farther away. The first four planets are close in volume, and Pluto also, but Saturn, Neptune, and Jupiter are very large and are called "gas giants". The temperature on the surface of any planet depends on how far or near from sun.

Venus.

 Pluto and Neptune are very cold. Mercury day it's very long it = 59 days on earth that's because it's turning around itself very slowly and that resulted of extreme temperatures at the sun-facing side of Mercury, on the other side, the temperature is much colder. there are other factors that confronted Mercury extreme temperature that is it has no atmosphere. this because of its the first planet in front of our star which makes it more susceptible to solar wind. our planet Earth's atmosphere is formed of a mix of gases, Oxygen is %21 & Nitrogen is %78, other planets have its own atmosphere gases mixture and it varies widely.

Jupiter Compared to Earth.

 the variation of other planets atmosphere in our solar system and the extreme temperatures provide the evidence that these planets are not occupied with living beings, but recent researchers provided evidence that life could form in the extreme heat and cold circumstances depending what was observed on Earth under the ocean in extreme cold and under the lava lakes, life was found in there and if it exists here, it could form at any Carbon rich environment.

comet's Orbit.

Every planet has its own followers classified as moons, meteoroids & asteroids, Earth has its own moon, Saturn & Jupiter have a much number of moons orbiting them. Galileo could observe four moons for Jupiter in 1617. the most wired object in space is Saturn, it has many surrounding rings of celestial bodies orbiting in a uniform harmonic motion and it has a hexagon shape at its north pole. There are also small planets which orbit the Sun between Saturn and Jupiter, for example, "Ceres", this planet was discovered in 1801, its diameter 630 km.

Hall Comet's Tail.

Expectations of these small planets in this area that it was all one planet that has exploded a long time ago. Meteors are so bright when they get close to the sun, the form a long tail of saturated elements for millions of kilometers behind it and it has an elliptical orbiting shape. The sun also revolves around rocky remains, and when it enters the earth's surface, it burns, which does not burn completely and reaches the ground. A gap occurs when it collides or falls into the Ocean.

PLANET	DISTANCE FROM THE SUN (Millions)	DIAMETER	NUMBER OF MOONS	YEAR	DAY
Mercury	58	4840	2	88(DAYS)	59 DAYS
Venus	108	12300	-	225(DAYS)	244 DAYS
Earth	150	12756	1	365.25(DAYS)	23 HOUR, 56 MINUTES
Mars	228	6790	2	687(DAYS)	24 HOURS, 37 MINUTES
Saturn	778	142800	62	12 YEAR	9 HOURS, 50 MINUTES
Jupiter	1427	119300	49	29.5 YEAR	10 HOUR, 14 MINUTES
Uranus	2870	47100	27	84 YEAR	10 HOURS, 49 MINUTES
Neptune	4497	44800	14	165 YEAR	15 HOURS, 48 MINUTES
Pluto	5907	5900	5	248.5 YEAR	6.5 DAYS