Introduction
As far as Scientist know, that there are nine planets in our solar system. Each was created from the same cloud of particles that gave the sun its power, but they are all startlingly different in size and composition. Venus is death-trap for anybody bold enough to step on to its boiling surface. Jupiter and Saturn are giants balls with tiny solid cores. And earth is positioned in exactly the right place for life to exist.
How Planets Are Formed
The planets are formed from the same swirling spiral of debris as the sun. In this world violent whirlpool of particles, tiny pieces of debris were thrown together to form larger rocky bodies called "PLANETISIMALS". Gradually, these planetisimals joined together to form even larger objects called protoplanets. The protoplanets near the sun joined to form the rocky planets (Mercury, Venus, Earth and Mars). Protoplanets that formed farther out grew large enough to attract vast quantities of gas and become giant planets (Jupiter, Saturn, Uranus and Neptune). Pluto is thought to have been formed from the leftover material.
Some Facts.....
1) Leftover material in the solar system collided with the surfaces of the young planets. These impacts, billions of years ago, created the craters that we can still see today.
2) Because of the huge distances involved in space, astronomers often measures in astronomical units. One astronomical is equal to earth's average distance from the sun, approximately 149,600,000 Km.
Planetary Names
The names of the planets in our solar system originated from characters in ancient Greek and Roman legends. Mercury was named after the nimble messenger of the gods because of its fast orbit around the sun. Venus was named after the goddess of Beauty and Love because of its brightness in the night sky. Mars became identified with the roman god of war because of its angry red appearance. Jupiter was given the name of king of gods because of its size. Saturn was the god of the harvest. Uranus was named after the father of gods, Neptune after the roman god of water, Pluto after the Greek god of the underworld.
The Planets
The nine planets in our solar system form two distinct groups. The inner planets are those closest to the sun, consisting of Mercury, Venus, Earth, Mars.These are much smaller than the outer planets and are made up of rock and metal. Jupiter, Saturn, Uranus, and Neptune and Pluto are the outer planets, the first four of which are giant balls of gas with small and solid cores. Pluto is the odd planet because it is so much smaller than is gassy neighbours and is made of rock, metal and snow. Some think it may even be one of the Neptune's moon that has escaped it parents gravity.
Facts And Figures
Time Taken For the Planets To Form:
MERCURY: 80,000 Years
VENUS: 40,000 Years
EARTH: 110,000 Years
MARS: 200,000 Years
JUPITER: 1,000,000 Years
SATURN: 9,000,000 Years
URANUS: 300,000,000 Years
NEPTUNE: 1,000,000,000 Years
PLUTO: 1,000,000,000 Years
As far as Scientist know, that there are nine planets in our solar system. Each was created from the same cloud of particles that gave the sun its power, but they are all startlingly different in size and composition. Venus is death-trap for anybody bold enough to step on to its boiling surface. Jupiter and Saturn are giants balls with tiny solid cores. And earth is positioned in exactly the right place for life to exist.
How Planets Are Formed
The planets are formed from the same swirling spiral of debris as the sun. In this world violent whirlpool of particles, tiny pieces of debris were thrown together to form larger rocky bodies called "PLANETISIMALS". Gradually, these planetisimals joined together to form even larger objects called protoplanets. The protoplanets near the sun joined to form the rocky planets (Mercury, Venus, Earth and Mars). Protoplanets that formed farther out grew large enough to attract vast quantities of gas and become giant planets (Jupiter, Saturn, Uranus and Neptune). Pluto is thought to have been formed from the leftover material.
Some Facts.....
1) Leftover material in the solar system collided with the surfaces of the young planets. These impacts, billions of years ago, created the craters that we can still see today.
2) Because of the huge distances involved in space, astronomers often measures in astronomical units. One astronomical is equal to earth's average distance from the sun, approximately 149,600,000 Km.
Planetary Names
The names of the planets in our solar system originated from characters in ancient Greek and Roman legends. Mercury was named after the nimble messenger of the gods because of its fast orbit around the sun. Venus was named after the goddess of Beauty and Love because of its brightness in the night sky. Mars became identified with the roman god of war because of its angry red appearance. Jupiter was given the name of king of gods because of its size. Saturn was the god of the harvest. Uranus was named after the father of gods, Neptune after the roman god of water, Pluto after the Greek god of the underworld.
The Planets
The nine planets in our solar system form two distinct groups. The inner planets are those closest to the sun, consisting of Mercury, Venus, Earth, Mars.These are much smaller than the outer planets and are made up of rock and metal. Jupiter, Saturn, Uranus, and Neptune and Pluto are the outer planets, the first four of which are giant balls of gas with small and solid cores. Pluto is the odd planet because it is so much smaller than is gassy neighbours and is made of rock, metal and snow. Some think it may even be one of the Neptune's moon that has escaped it parents gravity.
Facts And Figures
Time Taken For the Planets To Form:
MERCURY: 80,000 Years
VENUS: 40,000 Years
EARTH: 110,000 Years
MARS: 200,000 Years
JUPITER: 1,000,000 Years
SATURN: 9,000,000 Years
URANUS: 300,000,000 Years
NEPTUNE: 1,000,000,000 Years
PLUTO: 1,000,000,000 Years
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