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The Moving Sky

Starter:

Name as many things as you can that

you can see in the sky, which areoutside the atmosphere

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Lesson Objectives:

Understand where our star signs

come from

Learn about eclipses of the Sun and

Moon

You have an A3 worksheet for the lesson listen carefully so you

can answer the questions

on the sheet!

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The Sun -days

The Sun sits in the centre of our Solar System, and

all planets orbit around the Sun

It looks from Earth asthough the Sun goes

round us once a day.

In reality, the Earth is

spinning and the Sun

stays roughly where it

is.

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The Sun - years

Over the course of the year, the Earth goes oncearound the Sun.

To explore this, we need to know about the stars in the

sky.

Astronomers say that the stars are fixed in position, so

as the Earth goes around the Sun, different stars areseen up above

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Here iswhat they

mean:

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Constellations

These are groupsof stars, named

thousands of

years ago.

The middle belt

highlighted is

called the Zodiac.

All the named constellations in the zodiac are the ones

we give to our star signs. How many can you think of...?!

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Constellations in the Zodiac

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At any time, the Sun will be in front of one of

them, we just cant see them if its daytime.

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The constellation

which is behind

the Sun when you

are born gives

you your star

sign!

(its not actually thesame these days, it is

all based on their

positions thousands

of years ago!)

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What about this star sign?

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What star sign would someone be if they were

born at this time...?

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EclipsesHas anyone ever seen an eclipse?

There are two kinds, Solar and Lunar eclipses

Lunareclipsesoccur when the

Moon passes

directly behind

the Earth fromthe Sun...

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Lunar Eclipse

The moon turns a dark rusty colour!

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A Solar EclipseThese require the moon to pass exactly between the

Sun and Earth and are rarer.

The diameter of the Moon is 81 times smaller than the

diameter of the Sun, but it is 81 times closer!

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How a Solar eclipse happens

Only totallydark part

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A Solar Eclipse

First contact

Diamond Ring

Corona light

around edge

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A Solar Eclipse - Higher

A solar eclipse happens because the apparent diameter

of the Sun and Moon is identical when viewed from

Earth roughly the same size as the width of a

thumb held at arms length.

You can check this fact using the data below use the

box on your worksheet. Should the Moon and Sun

appear the same size in the Sky?

Diameter (km) Distance Away (km)

Sun 1,392,000 149,600,000

Moon 3,474 384,399

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Plenary

Use 10 stars to make your own star sign!

Here is the

Scorpio star

sign see

how thestars trace

the shape.