As we know, solar system consist of the Sun, planets and their satellite.
But other members are also there in our solar system, that people generally don't know.
They are : Asteroid belt, Cuiper belt and Cloud of Oort.
Planets are devided into 2 groups : Internal Planetsand External Planets.
Internal Planets :
Mercury, Venus, Earth, Mars are Internal planets. They are made of rocky surface. This table shows you their properties....
| Mercury | Venus | Earth | Mars | |
|---|---|---|---|---|
| Distance from sun (km) | 5,79,09,100 |
10,82,08,900 |
14,95,97,900 |
22,79,40,500 |
| Diameter (km) | 4,878 |
12,103 |
12,756 |
6,786 |
| Gravity (m/sec*sec) | 3.7 |
8.761 |
9.8 |
3.71 |
| Period of revolution (days) | 87.97 |
224.70 |
365.26 |
686.98 |
| Speed of revolution (km/hr) | 1,70,500 |
1,26,070 |
1,07,220 |
86,680 |
| Rotation period (hour:minute) | 58 : 16 |
243 : 18 |
23 : 56 |
24 : 37 |
| Mass ( Earth = 1) | 0.055 |
0.81 |
1 |
0.11 |
| Density (Water = 1) | 5.43 |
5.25 |
5.52 |
3.95 |
| Temperature (min,max) `C | -180', 430' |
465' |
-70', 56' |
-120', 25' |
| No. of satellite | - |
- |
1 |
2 |
External Planets :
Jupiter, Saturn, Uranus, Naptune are External planets. They are made of gas. And They don't have rocky surface. (**Pluto is now not considered as planet, but a member of Cuiper belt, but here for just information, its property is given)
| Jupiter | Saturn | Uranus | Neptune | Pluto** | |
|---|---|---|---|---|---|
| Distance from sun (km) | 77,88,33,000 |
1,42,69,78,000 |
2,87,09,91,000 |
4,49,70,70,000 |
5,91,35,10,000 |
| Diameter(km) | 1,42,984 |
1,20,536 |
51,118 |
49,528 |
2,324 |
| Gravity (m/sec*sec) | 24.9 |
10.48 |
7.84 |
11.46 |
0.098 |
| Period of revolution (years) | 11.86 |
29.46 |
84.01 |
164.79 |
247.7 |
| Speed of revolution | 47,000 km/hr |
34,700 km/hr |
24,460 km/hr |
19,560 km/hr |
16,790 km/hr |
| Rotation period (hr:mn) | 9 : 55 |
10 : 40 |
17 : 14 |
16 : 07 |
6 : 07 |
| Mass(Earth=1) | 318 |
95.18 |
14.51 |
17.14 |
0.0022 |
| Density(Water=1) | 1.33 |
0.69 |
1.29 |
1.77 |
2.03 |
| Temperature 'C | -150' |
-180' |
-210' |
-210' |
-220' |
| Satellite | 63* |
46* |
27* |
13* |
1 |
*The number of satellite changes (or increases) as research goes.
Cuiper belt :
- It is named on Duch scientist Jeralsde Cuiper.
- It consist of 75,000 space objects.
- It starts from 6,000 million km to 75,000 million km to the Sun.
- Temperature : -200 'C
Cloud of Oort :
- It is named astronomer Jaan Oort.
- After Cuiper belt, it is spreaded to 1,50,00,000 million km.
- It consist of 2,00,000 miollion comets.