00:00Our solar system is one of over 500 known solar systems in the entire Milky Way galaxy.
00:08The solar system came into being about 4.5 billion years ago,
00:14when a cloud of interstellar gas and dust collapsed, resulting in a solar nebula,
00:19a swirling disk of material that collided to form the solar system.
00:25The solar system is located in the Milky Way's Orion star cluster.
00:30Only 15% of stars in the galaxy host planetary systems, and one of those stars is our own Sun.
00:40Revolving around the Sun are eight planets.
00:43The planets are divided into two categories based on their composition, terrestrial and Jovian.
00:49Terrestrial planets, including Mercury, Venus, Earth and Mars, are primarily made of rocky material.
00:56Their surfaces are solid, they don't have ring systems, they have very few or no moons, and they are relatively small.
01:05The smallest and closest to the Sun is Mercury, which has the shortest orbit in the solar system at about three Earth months.
01:12Venus is the hottest planet with temperatures of up to 867 degrees Fahrenheit due to an atmosphere of carbon dioxide and extensive lava flows.
01:24Next to this world of fire is a world of water, Earth.
01:28The water systems on this planet helped create the only known environment in the universe capable of sustaining life.
01:34The last of the terrestrial planets, Mars, might have also supported life about 3.7 billion years ago, when the planet had a watery surface and moist atmosphere.
01:47Beyond the four terrestrial planets of the inner solar system lie the Jovian planets of the outer solar system.
01:55The Jovian planets include gas giants Jupiter and Saturn, and ice giants Uranus and Neptune.
02:01The gas giants are predominantly made of helium and hydrogen, and the ice giants also contain rock, ice, and a liquid mixture of water, methane, and ammonia.
02:12All four Jovian planets have multiple moons, sport ring systems, have no solid surface, and are immense.
02:20The largest Jovian is also the largest planet in the solar system, Jupiter.
02:25Nearby is Saturn, the solar system's second largest planet.
02:31Its signature rings are wide enough to fit between Earth and the Moon, but are barely a kilometer thick.
02:40Past Saturn are the ice giants Uranus and Neptune.
02:44The slightly bigger of these ice giants, Uranus, is famous for rotating on its side.
02:48Next Uranus is Neptune, the outermost planet in the solar system and also one of the coldest.
02:57Orbiting the terrestrial planets is the asteroid belt, a flat disk of rocky objects full of remnants from the solar system's formation.
03:05From microscopic dust particles to the largest known object, the dwarf planet, Ceres.
03:10Another disk of space debris lies much further out and orbits the Jovian planets, the icy Kuiper Belt.
03:20Apart from asteroids, the Kuiper Belt is also home to dwarf planets such as Pluto and is the birthplace of many comets.
03:28Beyond the Kuiper Belt is the Oort Cloud, a vast spherical collection of icy debris.
03:33It is considered the edge of the solar system since that is where the gravitational and physical influences of the Sun end.
03:41Our 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.
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