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Scale Model of Earth/Sun/Moon

A model that compares the sizes of and distances between the Earth, Sun and Moon.
by

Don Crandall

on 11 October 2018

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Transcript of Scale Model of Earth/Sun/Moon

Earth
Sun
Moon
Scale Model
A scale model is a copy of an object that maintains all
of the relative proportions of the original object.
(All parts of the model are changed at the same rate)
(The body was shrunk more than his head)
Model of a Moon Lander
Earth
Moon
And the Moon is 30 Earth diameters away!
T h e E a r t h i s 1 0 7 S u n d i a m e t e r s a w a y . . .
This distance is also called 1 Astronomical Unit or 1AU. It is used to measure distances with in our Solar System.
(149 598 000 kilometers)

When making a scale model of the Earth Sun and Moon it is extremely difficult to show the size and distances between these three at the same time.
These 109 red boxes represent the amount of Earth's needed to equal the sun's diameter...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61
62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109
By dividing the Sun's diameter by Earth's diameter you will then know how many Earth's you could place across the Sun.
First, let's compare the diameter of the Earth to the Sun:
The Earth is 12,756 km in diameter
The Sun is 1,392,000km in diameter
1,392,000km/12,756km = 109. 125
It turns out, it takes just over 109 Earth diameters to equal 1 Sun diameter
But how far is the Earth from the Sun?
The distance from the Sun to the Earth is 149,598,000km
By dividing the Sun to Earth distance by the Sun's diameter we know how many Sun's would fit between the Earth and the Sun.

149,598,000/1,392,000 = 107.5
The Blue Marble is a famous photograph of the Earth taken on December 7, 1972, by the crew of the Apollo 17 spacecraft at a distance of about 45,000 kilometres (28,000 mi). Apollo 17 was the last manned lunar mission. No humans since have been at a range where taking a whole-Earth photograph such as The Blue Marble would be possible.
That means the Earth is really, really small when compared to the big SUN
So, the Earth is much smaller than the Sun
So...
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