Astronomy - Universe, Galaxies, Solar Sytems etc
This lesson covers:
- The relationship between planets, star systems (the solar system), galaxies, and the universe
- The difference between asteroids and comets
- The difference between natural and artificial satellites
Error Notice
At 2:08 we say that any star being orbited by planets is called a 'solar system'. In fact, it's only our sun and the surrounding planets that is called the solar system. For any other star than the sun it is called a 'star system'.
A satellite is any object that orbits a celestial body, such as a star or planet.
Is the moon a satellite?
Yes
No
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You won't be tested on this in the exam, but it is helpful to know the order of the planets.
Match the letters A to D on the diagram above with the following planets:
Earth:
Venus:
Mars:
Neptune:
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What shape are the orbits of comets?
Spherical
Circular
Elliptical
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The asteroid belt is a region of our solar system that contains millions of asteroids.
Which two planets is the asteroid belt found between?
Earth and Mars
Venus and Earth
Mars and Jupiter
Jupiter and Saturn
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What is a comet mostly made of?
Rock and metal
Hydrogen and Helium
Ice and dust
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What is an asteroid mostly made of?
Rock and metal
Ice and dust
Hydrogen and Helium
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supernova / galaxy / gravity / solar / lunar
- A is a collection of billions of stars.
- Stars in a galaxy are held together by .
- Stars orbit around the centre of the galaxy.
- Our system is in the Milky Way galaxy.
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True or false? The universe contains only a few galaxies.
True
False
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If you were teleported to a random location in the universe, where would you most likely end up?
In empty space
On a star
On a planet
On a satellite
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Starting with the smallest, which of the following shows the correct order of size?
Planet, satellite, galaxy, Universe, solar system
Satellite, planet, solar system, galaxy, Universe
Universe, galaxy, planet, solar system
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Which statement is correct regarding satellites?
An artificial satellite is man-made whereas a natural satellite is not man-made
Neither natural and artificial satellites are man-made
Both natural and artificial satellites are man-made
A natural satellite is man-made whereas an artificial satellite is not man-made
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Which of the following is a natural satellite?
Moon
Hubble Space Telescope
International Space Station
Aeroplane
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Which of the following are artificial satellites?
(Select all that apply)
International Space Station
Moon
Aeroplane
Hubble Space Telescope
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