Who invented the radio telescope and when (what year) ? Also have you seen anything fascinating through the telescope

Question: Who invented the radio telescope and when (what year) ? Also have you seen anything fascinating through the telescope where you work ?
- Keywords:
  invention,
  radio,
  telescope
Asked by Charlotte to Anna on 19 Nov 2014.
- Anna Scaife answered on 19 Nov 2014:
  
  The first radio telescope was built by Karl Jansky in 1931. It was a pretty simple instrument and you probably wouldn’t recognise it as a radio telescope!
  These days we name the astronomical unit of radio power after him, i.e. we say “this source is 10 Janskys bright”.
  
  The technique that links together lots of dishes in an array was invented later. There’s some debate over who invented this (the UK and Australia argue over it…), but the nobel prize for using the Earth’s rotation to improve the performance of these arrays was awarded to Martin Ryle, who was a British radio astronomer.
  
  I’ve seen all kinds of things! Some of the most impressive objects in the radio sky are the ones that were found earliest. For example the giant jets from super massive black holes were completely unknown before we had radio telescopes. Check out Cygnus A (http://en.wikipedia.org/wiki/Cygnus_A). It’s the brightest source in the low frequency radio sky. In the most recent image of it I saw, which was made with the LOFAR telescope, it’s 40,000 Janskys bright!

Question: Who invented the radio telescope and when (what year) ? Also have you seen anything fascinating through the telescope where you work ?