The Solar System
The solar system originated about 4.6 billion years ago.
It is located in a large spiral galaxy, called the Milky Way (or simply the Galaxy).
Our Sun is one of approximately 200 billion stars in the Galaxy.
Interesting: Nearest neighboring star is Proxima Centauri, 4.3 light-years away.
The solar system consists of:
- The Sun, our central star, in which more than 99% of all mass of the system is concentrated
- Planets that are orbiting the sun
- Moons that circle around planets Asteroids or asteroids, most of which are centered between the orbits of Mars and Jupiter
- Comets, huge amount of ice formed bodies which are concentrated particularly in Kuiper Belt just beyond Pluto and more distant Oort cloud
- Dust and various tiny fragments of rocks and ice (so-called meteoroids)
Planets of the Solar System
The planets are divided into the inner and outer, separated by the main belt of the asteroid system.
Part of the outer planets are the so-called dwarf planets:
- Inner: Mercury, Venus, Earth, Mars
- Outside: Jupiter, Saturn, Uranus, Neptune
- Of that dwarf: Ceres, Pluto, Haumea, Makemake, Eris
Selected Solar System Planets:
|| Gravitational acceleration
|| Number of months
- Weight is given as a multiple of Earth weight.
- Gravitational acceleration is thought to be
the gravitational acceleration on the surface,
expressed as a multiple of gravitational
acceleration at the Earth's surface.
- The Earth's weight is 5.97. 1021 tons,
gravitational acceleration at the
Earth's surface is 9.81 m / s 2