Our planetary system is the Solar System. It contains one star (Sun), eight planets (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune), five dwarf planets (Ceres, Pluto, Haumea, Makemake, Eris), and thousands of asteroids.
Formation
Solar System was formed around 4.5 billion years ago, after a collapse of a cloud of interstellar dust and gas which formed a solar nebula...
Structure
In the centre of the Solar System lays the Sun, its only star and reason for all objects being gravitationally pulled together...
Sun
The Sun is the main source of energy in the Solar System and emits light in all parts of the spectrum...
Terrestrial Planets
Terrestrial planets (Mercury, Venus, Earth, and Mars) are rocky planets close to the Sun...
- Mercury: Smallest planet, no atmosphere or satellites.
- Venus: Hottest due to greenhouse effect, no moons.
- Mars: Red planet, possibly had water, 2 moons.
Earth
Third planet from the Sun, supports life, 70% water surface...
Moon: Earth's only natural satellite, no atmosphere or water.
Jovian Planets
Gaseous giants with no solid surface. Includes Jupiter, Saturn, Uranus, and Neptune.
- Jupiter: Largest planet, strong magnetic field, 13 moons.
- Saturn: Famous for rings, low temperature, frozen gases.
- Uranus & Neptune: Furthest, low radiation, fast rotation.
Written by Pavle Ignjatovic