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Slide 1

Space

Space

A star (our sun )is part of a galaxy.

A planet (earth) orbits a star.

A moon (our moon) orbits a planet (earth)

Slide 2

SPACE

SPACE

One light year is the distance travelled by light in a year.

It takes light from the sun 8 minutes to get to the earth.

Slide 3

SPACE

SPACE

It takes 4 light years for light to reach the nearest star (alpha centauri)

It takes light 100,000 light years to get to the edge of our galaxy.

Slide 4

SPACE

SPACE

There are two types of telescope ,the refractor and the reflector.

Slide 5

SPACE

SPACE

The refractor works by light bending or refracting.

The reflector works by light reflecting.

Slide 6

The Refracting Telescope

The Refracting Telescope

The refracting telescope consists

of two convex lenses.

The objective lens collects light

from distant objects such as

planets and stars. It forms an image of them.

The eyepiece lens then magnifies this image.

Slide 7

SPACE

SPACE

Slide 8

The Refracting Telescope

Slide 9

SPACE

SPACE

Use can be made of light ,radio and micro waves from the electromagnetic spectrum.

Slide 10

SPACE

SPACE

Radio waves are detected by large curved dishes similar to the dish aerials in T.V. systems

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