Parkes radio telescope

In the article, “A new Telescope Makes it Possible to view 300,000 formerly unseen galaxies in detail” states that most telescopes only use visible light, which makes objects appear red.  The further you look out the more red everything becomes.  However, radio telescopes allow you to see everything in the universe.  With the old Parkes radio telescope you can see that the center of the Milky Way is glowing.  The Parkes gives a clear view and allows us to glance at galaxies that are unseen.  However, the downfall is that the picture is in black and white with low resolution.  Just recently a group of students built a 10-square-kilometer radio telescope in the western Australian desert that can spot 300,000 galaxies.

The Parkes telescope consists of a radio receiver and an antenna system that is used to detect radio frequency emitted by objects beyond Earth. Radio telescopes are located on the ground and must be very large because radio wavelengths are much longer than those of visible light.  Parkes is located in New South Wales, Australia. and is one part of the Australia Telescope National facility.  This telescope is suited to find pulsars and rapidly spinning neutron stars that size of a small city.  Our textbook also discusses radio telescopes on page 124 and it describes how the angular resolution is poor for long wavelengths of light which is what the article above had stated.  The book also goes on to say that telescopes that are specialized to observe different wavelengths of light allow us to learn far more than we could learn from visible light alone.  On page 51 in the lecture tutorial book we learned that radio telescopes can observe day and night and radio waves penetrates Earths atmosphere and reaches the surface.

I enjoyed this conceptual objective the most because it reminded me how fascinated I was as a kid in wanting a telescope.  I just thought it was a cool concept that I could view the stars through a lens. Furthermore after learning about this conceptual objective I learned that telescopes are more complex than i imagined! Before this class I never knew of all the different types of telescopes there were.  I am satisfied in knowing that I know more about telescopes and their functions.


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