1) How many solar systems are in our galaxy? a) over 200 b) over 300 c) over 500 2) How old is our solar system? a) 6.5 billion years b) 5.5 billion years c) 4.5 billion years 3) What is the percentage of stars with planetary systems? a) 20% b) 15% c) 40% 4) How many planets revolve around the sun? a) 9 b) 8 c) 6 5) Planets are divided into a) Terestrial and Juvenile group b) Terrestrial and Jovian group 6) Which planet is the closest to the sun? a) Venus b) Mars c) Mercury 7) What is the temperature on Venus? a) 867 degrees Fahrenheit? b) 678 degrees Fahrenheit c) 479 degrees Fahrenheit 8) What planets are in the outer solar system? a) Jupiter, Mercury, Saturn, Venus b) Jupiter, Saturn, Uranus, Neptun c) Saturn, Mars, Uranus, Neptun 9) What is the largest planet in our  solar system? a) Jupiter b) Saturn c) Neptun 10) Which planet rotates on its side? a) Venus b) Uranus c) Mercury 11) What is the coldest planet in the universe? a) Saturn b) Uranus c) Naptun 12) Where do physical and graviational influences of the sun end? a) Oort Cloud b) Kuiper Belt c) Ceres

Solar System

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