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- Being closer to the Sun, the planets Venus, Earth, Mercury and Mars are called Inner Planets.
- Black Arrow is the only planet launched by Britain.
- Annually the revolution of Earth around the Sun increases by 0.0001 seconds.
- A day on the Pluto is equal to a week on the Earth.
- Sputnik is the first satellite made by man.
- The size of the Sun is so huge, that approximately 1 million Earths can accommodate on it.
- Halley’s Comet becomes visible after a period of 76 years.
- The number of galaxies present in universe range up to 100 billion.
- The size of Jupiter is as large as 1000 Earths.
- As many as 1-2 meteorites reach the Earths surface per day.
- There are as many as 400 billion numbers of stars in largest galaxy present in the Universe.
- Jupiter’s moon, Europa is enveloped with ice.
- The temperature on the surface of the Sun is 6000 degree Celsius. The gases present on the Sun are Hydrogen and Helium.
- Since the Venus rotates clockwise, the Sun sets in the Eastern hemisphere and rises in the Western hemisphere.
- Sun does have some cool spots on its surface. They are called Sunspots. The magnetic fields obstruct the heat from reaching the surface of the spots thus keeping them cool.
- The matter which sun throws away in space is termed as the solar wind.
- Uranus was discovered by Sir William Herschel. Hence it is also called the George’s Star.
- Jupiter has 4 moons namely, Ganymede, Europa, Io and Callisto.
- Pluto was earlier known as a planet. After 2006, the definition of planets changed and now it is designated as the Dwarf Planet.
- The hottest planet in the solar system is Venus. This is because of its proximity to the Sun. The temperature of the planet is above 450 degrees.
- The mass of supernovas is 30 times more than the mass in the Sun.
- Temperature is the reason of the star’s color.
- 1 year on Pluto is equal to 248 years on Earth.
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