Moon!!!. How Big Is the Moon and Sun? Whitchurch High School Year 8. Earth to the Moon. The Moon is 384,403 kilometres (238,857 miles) distant from the Earth! Its diameter is 3,476 kilometres (2,160 miles).
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How Big Is the Moon and Sun?
Whitchurch High School
The Ball ExperimentThis will test the ratio equationthat has just been usedto find the moon diameter.
1 small ball
Paper and Pen
Place your measuring stick with the 0 edge on the side of the table
Then place the large ball at the other end of the meter stick
Place the small ball in front of the large ball at the point where the small ball eclipses the large ball from eye level
Look at the end of the measuring stick and record how far the small ball was away from the big ball.How to do the ball experiment
KEY (NOTE MEASUREMENTS ALL IN cm)
A=BALL 1 DIAMETER B=BALL 2 DIAMETER
X=DIST TO BALL 1 Y=DIST TO BALL 2
The ratio of the two distances and the ratio of the two diameters is the same at about 2.7
B/A = Z/X
So this means the method we just used to measure the diameter of the Moon is valid.
BY: Thomas Pacey and Hugo Vine
This is a picture we took of the Sea of Crisis. We took it by placing a web-cam on the back of a telescope and videoed our findings. We used a computer program to stack up the frames and come out with a brilliant picture like this.
The Sea of Crisis
B/A = Y/X ,
This is a ratio standing for distance from earth to moon divided by the distance from us to cardboard is equivalent to the diameter of the Sea of Crisis divided by the size of the semicircle in the cardboard.
The diameter of the Sea of Crisis = B / A x X = Y
The diameter is 550,000m
( Y ) – this is to 2 significant figures
A pinhole projector is a box that has a black surface on 1 side, there is a hole a hole in the middle of the black surface. On the other side there is a translucent surface.
Image on screen
This is a pinhole camera
Diameter of the sun = height of sun image
Sun to pinhole image to pinhole
=1.8x106 km =diameter of sun
Diameter of Sun:-1.1x10 6 km
The Sun diameter is
Reference GCSE Astronomy