Here is some important General Question of Solar system that generally asked in Competitive exams .Also click here to read Most important numbers in the Universe that define our existence.
Ans=> Whenever the sky is discussed then the solar system is also discussed. What is the Solar System?
The Sun, its 8 planets, 166 known satellites to planets, comets, five dwarf planets and billions of small bodies… that directly or indirectly rotate about the Sun form the Solar System.
Brief info on planets of the Solar System-
Mercury is the closest planet to the Solar System and is the smallest planet in size. Pluto was formerly considered to be the smallest planet but now it is classified as a dwarf planet. It takes 88 days for the Sun to revolve.
Venus is the second planet from the Sun. The size and make-up of Venus is almost equal to Earth. That is why Venus is called Earth’s sister.
The third planet Earth is our own home. Earth is the third planet from Sun to Mercury and Venus. Larger than all of the inner planets, in complete consciousness, earth is a returning planet where life is at.
The average distance of the Earth from the Sun is called the celestial unit. It is about 15 crores kilometers
Jupiter sun is the fifth and largest planet in our solar system. It is a gas monster whose mass is equal to the Thousand part of the Sun and 2.5 times the mass of the other seven planets in the Solar System.
Saturn is a member planet of the Solar System. It is at the sixth place in the sun and in the solar system there are the largest planets after Jupiter. Saturn has 62 satellites. In which Titan is the largest. Titan is the second largest satellite after Jupiter’s satellite, Guinness.
Uranus is the seventh planet from the Sun in our solar system. On the basis of diameter it is the third largest of the solar system and the fourth largest planet on the basis of mass.
Neptune is the 8th planet from the Sun in our solar system. On the basis of diameter it is the fourth largest planet of the Solar System and the third largest planet on the basis of mass. Neptune takes 164 years to complete a full revolution of the sun.
Ans=> Earth – Our home, where we all are born, live and die is an unique planet in the entire Universe. Not a single planet has been observed so far where life is possible in the entire universe.
Let us have a quick glance over a few things about Earth that many of you may not aware of-
Ans=> Sun the star that our Earth rotates about. This is the Sun that makes the life possible on Earth. It is Sun that gives us the light which is the source of almost all the energy which humans or any other life forms use.
Few interesting things about the Sun–
• The sun’s light to reach the earth in 8 minutes 16.6 seconds.
• The minimum distance from the Sun of the Earth is 14.70 million km. The maximum distance from the Sun to the Earth is 15.21 million km.
• 71% of hydrogen, helium 26.5% and other 2.5% of the chemical mixture constitute sun. All stars, including the sun and the hydrogen fusion reaction is said to be a mixture of helium.
• Light spots on sun are called penumbra which emit electromagnetic radiation that the Earth is a breakdown of the wireless communication.
Ans=> The beautiful Moon which has romanticized humans across civilizations for thousands of years is unique to all of us. It is a kind of a gift for humans from the nature. It is neither a star nor a planet. It is a satellite of Earth and rotates about it.
Let us tell you a few interesting things about the moon.
• Lunar eclipse always happens to the full moon when the earth passes between the sun and the moon
• Its highest mountain (height- 10668 m) is taller than Mount Everest (8848 m).
• July 1969, Apollo-ll spacecraft landed on the Moon. Neil Armstrong and Edwin Aldrin are the first ones who have walked on the Moon.
• The moon is as old as the earth is about 460 million years as it was a part of the Earth itself (millions of years ago).
Ans=> Illustration of a collision between two planetary bodies
How the moon came into existence, there are many theories behind that. But the most approved theory among the scientists is Giant-impact hypothesis ,sometimes called Big Splash.
The Giant-impact hypothesis tells that the Moon came into existence with the impact between the Earth and a celestial body (generally called Theia) approximately 4.5 billion years ago. That impact made a small piece of Earth fly away into the sky and that small part is nothing but the Moon.
Theia comes from Greek mythology, under the name of Titan, who was the mother of Selen, goddess of the Moon.