Transcript Basic space - World of Teaching

SPACE
A star (our sun )is part of a
galaxy.
A planet (earth) orbits a star.
A moon (our moon) orbits a
planet (earth)
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.
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.
SPACE
There
are two types
of telescope ,the
refractor and the
reflector.
SPACE
The
refractor works by
light bending or
refracting.
The reflector works by
light reflecting.
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.
SPACE
SPACE
Use
can be made of
light ,radio and micro
waves from the
electromagnetic
spectrum.
SPACE

Radio waves are detected by large curved
dishes similar to the dish aerials in T.V.
systems
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