How does pinhole camera work
By putting a small hole in a piece of paper and projecting it onto another piece of paper is a safe way to observe the sun
What can you not use to observe sun
- binoculars
-reading glasses
-telescopes
-sun glasses
-camera film
What is the ecliptic
The path planets follow
The sun appears to follow this line and it crosses how many constellation
13 ( the zodiacs)
Not all planets follow the ecliptic exactly they usually move how many degrees either way
1 or 2 degrees
What is the term used to show how far away a planet is from the ecliptic
Inclination
What is a planetary track
The path a planet makes on a star map
When a superior planet moves in the sky it normally moves how and what is it called
From right to left and we call it direct motion or prograde
What is a stationary point
There will be times when a planet does not appear to move at all
What is retrograde motion
When a planet appears to move backwards
Why does retrograde motion happen
As some planets have longer orbital periods the earth catches up with the planet
The planet appears to move backward as earth moves in front
Eventually planets realign and the planet moves directly
Why is Earths axis not in line with the ecliptic
Because earth is tilted
What is a meteoroid
An object in space, possibly similar to an asteroid that will eventually become a meteor
What are cometary meteoroids
Small particles shed by comets
What are asteroidal meteoroids
Particles that have fallen or chipped off meteoroids
What is a meteor
A meteoroid that has entered earth atmosphere
What are meteors know as
Shooting stars
Why does atmosphere burn up meteors and what happens to them
Because the high speed causes immense friction and it is typically vaporised
What is a meteorite
A meteor that survives atmosphere and it will hit earth
What is the percentage of Meteors that hit the earths surface
10 %
What are meteorites made of
Iron
In meteor showers they appear to come from one point what is this point called
The radiant
How do We know where he radiant is
By tracking where meteors originate
What is the celestial sphere
An imaginary sphere around earth
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Topic 1- The Earth31
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Topic 2- The Moon27
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Topic 3- The Earth Moon Sun System57
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Topic 4- Time And Earth Moon Sun Cycles32
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Topic 5 - Solar System Observations35
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Topic 6 - Celestial observation73
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Topic 7 - Early Models Of The Solar System26
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Topic 8- Planetry Motion And Gravity35
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Topic 9- Exploring The Moon0
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Topic 10-solar Astronomy0
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Topic 11- Exploring The Solar System0
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Topic 12-formation Of Planetary Systems0
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Topic 13-exploring Starlight0
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Topic 14- Stellar Evolution0
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Topic 15 - Our Place In The Galaxy0
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Topic 16- Cosmology0
