Our system is one among over 500 known solar systems within the entire Milky Way galaxy.
The system came into being about 4.5 billion years ago, when a clou of interstellar gas and mud collapsed, leading to a solar nebula, a swirling disc of fabric that collided to make the system .
The system is found within the Milky Way’s Orion star cluster. Only 15% of stars within the galaxy host planetary systems, and one among those stars is our own sun.
Revolving round the sun are eight planets. The planets are divided into two categories, supported their composition, Terrestrial and Jovian.
Terrestrial planets including Mercury, Venus, Earth, and Mars, are primarily made from rocky material. Their surfaces are solid, they don’t have ring systems, they need only a few or no moons, and that they are relatively small.
The smallest and closest to the sun is Mercury, which has the shortest orbit within the system at about three Earth months.
Venus is that the hottest planet, with temperatures of up to 867 degrees Fahrenheit, thanks to an environment of CO2 and extensive lava flows.
Next to the present world of fireside may be a world of water, Earth. The water systems on this planet help create the sole known environment within the universe
capable of sustaining life.
The last of the terrestrial planets, Mars, may need also supported life about 3.7 billion years ago, when the earth had a watery surface, and moist atmosphere.
Beyond the four Terrestrial planets of the inner system lie the Jovian planets of the outer system .
The Jovian planets include gas giants Jupiter and Saturn and ice giants Uranus and Neptune.
The gas giants are predominantly made from helium and hydrogen, and therefore the ice giants also contain rock, ice, and a liquid mixture of water, methane, and ammonia.
All four Jovian planets have multiple moons, sport ring systems, haven’t any solid surface, and are immense. the most important Jovian is additionally the most important planet
in the system , Jupiter.
Nearby is Saturn, the solar system’s second largest planet.
Its signature rings are wide enough to suit between Earth and therefore the moon,
but are barely a kilometer thick.
Past Saturn are the ice giants, Uranus and Neptune.
The slightly bigger of those ice giants, Uranus, is legendary for rotating on its side.
Next to Uranus is Neptune, the outermost planet within the system , and also one among the coldest.
Orbiting the Terrestrial planets is that the belt , a flat disc of rocky objects, filled with remnants from the solar system’s formation. From microscopic dust particles, to the most important known object, the dwarf planet, Ceres.
Another disc of space debris lies much further out, and orbits the Jovian planets, the icy Kuiper Belt.
Apart from asteroids, the Kuiper Belt is additionally home to dwarf planets, like Pluto, and is that the birthplace of the many comets.
Beyond the Kuiper Belt is that the Oort cloud , a vast, spherical collection of icy debris. it’s considered the sting of the system since that’s where the gravitational and physical influences of the sun end.
Our solar system’s particular configuration of planets and other celestial objects, all revolving around a life-giving star, make it a special place to call home.