>> Solar System.
Objective, to understand the formation of the solar system and its planets.
Our solar system came into existence about 4.5 billion years ago.
The solar system was born from a spinning cloud of hydrogen,
helium gas and dust called a Nebula.
Due to this motion, the gas condensed to form a protostar.
Where the pressure and gravitational pull on the gas molecules kickstarted
a nuclear fusion reaction at the center of the protostar giving birth to the sun
The gas and dust as it's spun around the sun,
led to the formation of planets, asteroids, and comets.
The gravitational pull which the sun applies on planets,
makes them revolve around in orbits.
There are 8 planets in the solar system.
Closest to the sun is a group of solid, rocky planets, Mercury,
Venus, Earth, and Mars.
Beyond the orbits of Mars, lies the asteroid belt,
containing large chunks of rocks with varying sizes and shapes.
Further from the sun there are four giant gas planets, which have no solid surfaces.
They are Jupiter, Saturn,
Uranus, and Neptune.
Mercury is the smallest and
closest planet orbiting the sun at about a distance of 36 million miles.
Or 57.9 million kilometers from the sun.
Venus is the brightest planet in the sky.
And its structure and composition is similar to Earth.
It has an atmosphere that is dominated by carbon dioxide.
Earth is also called the Blue planet.
And is the only life sustaining planet known in the entire universe,
and has an atmosphere that is dominated by 78% nitrogen and 21% oxygen.
It is the only planet known to sustain a hydrosphere.
Mars is also called the Red plant because of iron oxide in its thin atmosphere.
Mars has huge caps of water and carbon dioxide called polar ice
caps that expand and shrink due to seasonal changes on Mars.
Jupiter is the largest planet in the Solar System.
It is so large that it can fit about 1,300 earths into it.
Its atmosphere has a peculiar giant red spot.
Saturn is the the second largest gaseous planet in the solar system,
having a complex ring system.
In its atmosphere, the speed of wind reaches about 1,118.5
miles per hour or 1,800 kilometers per hour.
Uranus is made mostly of hydrogen, helium, methane, and ammonia.
It is the third largest planet and has a few rings.
Neptune is a dark, cold, and icy blue planet.
The blue color is due to the presence of methane crystals.
The International Astronomical Union recently has resolved that
Pluto is no longer considered a planet in the Solar System due to its size.
The tabular form gives additional information regarding our Solar System and
its planets.
Summary.
The solar system has the sun at its center with eight planets revolving around it.