2.  Pros Cons
They are easy to They are too heavy
build to lift into space
Can operate in bad They are costly to
weather maintain.
Can be controlled Placed in remote
over the internet places
 Cheap to make Affected by other
radio waves

4.  The Parkes radio telescope
 Karl G. Jansky VLA (Very Large Array)

5. The Parkes Radio Telescope

6. Karl G. Jansky VLA

7.  Radio waves reflect off of the dish and into
the tip
 There are receivers under the tip that
intercept the radio waves

8.  We use them to intercept radio waves from space
 Invented in 1937 by Radio telescopes can measure
hydrogen between stars, something that optical these
telescopes measure radio waves, enabling them to see
into ranges that optical telescopes cants see, Scientists
can make false color pictures from these radio waves.
telescopes cant do because
E t astronomer Grote Rever, radio telescopes can search.
Contribute in many ways to astronomers zero mission
wavelengths of these hydrogen clouds are too long.
Objects such as pulsars and quasars are highly energetic
and emit radio waves in addition to visible light. Radio
telescopes can read these radio waves and gain
additional information about these objects.

9.  An area with no radio waves from any civilization
(eg. TV, computer, radio and GPS)
 It needs radio waves to function
 A dish
 An antenna
 A stand