0
This is right in there with cars and airplanes. ;-) Although Karl Jansky's "merry-go-round" is usually given the credit, earlier geniuses like Nikola Tesla would listen to radio noises and correlate them with the Milky Way. He even claimed to have heard signal from Martians. But, it was Bell Lab's Jansky who was asked to build one, and used a feed horn and a steerable antenna. So, the answer is Karl Jansky, in 1931 that usually gets the credit.
What else can I help you with?
How long has the bull have been in existence?
As long as cows have been in existence, or the whole Bos primigenius species and subspecies have been in existence.
How long has helium been in existence?
Helium is has been in existence since the beginning of the universe.
How long the Yankees have been in existence?
they have been in existence for 110 years since 1901.
Why do single dish radio telescopes have poor resolving power compared to optical telescopes of the same diameter?
Radio telescopes are generally much larger than optical telescopes for two reasons: First, the amount of radio radiation reaching Earth from space is tiny compared with optical wavelengths, so a large collecting area is essential. Second, the long wavelengths of radio waves mean that diffraction severely limits the resolution unless large instruments are used.
Why do radio telescopes have to be very large in order to effectively capture and study radio waves from space?
Radio telescopes have to be very large in order to effectively capture and study radio waves from space because radio waves have long wavelengths and low energy, requiring a large collecting area to gather enough of them for analysis. The larger the telescope, the more radio waves it can collect, allowing for more detailed and accurate observations of celestial objects.
How long has the telescope been around?
The invention of the telescope is generally attributed to Hans Lippershey in 1608. The first practical telescopes were developed by Galileo Galilei in 1609. So, telescopes have been around for over 400 years.
How long have humans used telescopes?
We know the telescope was invented by 1608 and soon many people, for example Galileo, were using telescopes. There is some evidence of earlier telescopes, but we aren't certain about that. So, humans have been using telescopes for about 400 years.
How long has the graphic art profession been in existence?
long time
How long has quickbooks been in existence?
since 1992
How long has a theramin been in existence?
October 1920
How long has radio shack been in business?
Radio shack has been in business since 1921
How long have cherry blossom trees been in existence?
they have been here forever
