The sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma. It is, by far, the most important source of energy for life on Earth. The sun's diameter is about 109 times that of Earth, and its mass is about 330,000 times that of Earth, accounting for about 99.86% of the total mass of the Solar System. About three-quarters of the Sun's mass consists of hydrogen (73%); the rest is mostly helium (25%). The last 2% is made of heavier elements including oxygen, carbon, neon, and iron. The sun is referred to as a Yellow Dwarf star. There are many other Yellow Dwarf stars in the universe. It formed approximately 4.6 billion years ago from a gravitational collapse of matter within an area of a large molecular cloud, a process from which all stars are born. The sun is roughly middle-aged and will remain fairly stable for another five billion years, after which the core of the Sun will experience an increase in density and temperature and transform into a Red Giant. When this happens, the Sun will become large enough to engulf the current orbits of Marcury, Venus, Earth, and possibly all the planets in our Solar System.
The sun is mostly composed of hydrogen.
The mass of the sun is about ______________ times that of Earth.
About how old is the sun and about how long until the sun explodes?
Mercury is the smallest planet.
Tell me 2 interesting facts about Mercury you learned from watching the video.
Humans could survive on Venus.
Why is Venus called "the most deadly planet?" Give at least 2 examples.
Earth, Our Home!
How many mission have been to Mars?
Mars is about half the size of Earth.
Jupiter is how many times the size of Earth?
Jupiter has rings.
Saturn is the largest planet in the solar system.
How many moons does Saturn have?
Uranus has rings.
Uranus is the coldest planet in our solar system.
Neptune is named after which Roman God?
A The God of War
B The God of the Sky
C The God of Love
D The God of the Sea
Neptune was discovered by....
A A telescope
B A scientist
C A mathematical prediction
D A satellite
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What category does Pluto currently belong in?
A It's still a planet
D Dwarf Planet
In one or two sentences, explain why Pluto is no longer considered a planet.
Which planet is the most interesting to you? Why? Be sure your response is at
least 3 sentences long.
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