You know I like astronomy and that I have several telescopes, the biggest one has a 16" diameter mirror. Remember these pictures from one of my older posts:
That is a fairly large scope for backyard use but of course it doesn't compare with the larger professional ones used by astronomers. They have some really large scopes, but none of these optical scopes can compare with large radio scopes. Well, mine is sure tiny compared to some of the radio scopes that are active today. Like this one, the Arecibo Radio Telescope, at Arecibo, Puerto Rico. It is 1000 feet (305 m) across, that is over three football fields!!
Now the Chinese have decided to build one and of course it must be the biggest in the world. Here is what they are planning:
It is a 500 meter dish; that is over 1500 feet across. Notice it will have six towers to support the focal point receiver whereas the one in Porto Rico only has three. At least this is peaceful scientific achievement.