Universe Puzzle No. 9

Last week’s Universe Puzzle was a wee bit too hard, wasn’t it?

Well, this week’s one should be a tad easier, though you will still need to cudgel your brains a bit and do some lateral thinking (five minutes spent googling likely won’t be enough). But, as with all Universe Puzzles, this is a puzzle on a “Universal” topic – astronomy and astronomers; space, satellites, missions, and astronauts; planets, moons, telescopes, and so on.

Which is the odd one (or two!) out?

Crawford Hill, Dover Heights, Kootwijk, Richmond Park, Seeberg Hill, Wheaton.

UPDATE: Answer has been posted below.

Seeberg Hill is where the Gotha Observatory (Seeberg Observatory, Sternwarte Gotha or Seeberg-Sternwarte) was located; it was an optical observatory. All the others are, or were, sites of radio telescopes, or observatories: Crawford Hill, in New Jersey, is where the CMB (cosmic microwave background) was first detected; Dover Heights is the site of Australia’s first radio telescope/observatory; Kootwijk is the site of the Netherlands’ first radio observatory; Richmond Park, in London, is where Hey, Parsons, and Phillips, in 1946, detected the first discrete extra-galactic astronomical source (Cygnus A); and Wheaton, in Illinois, is the site of Grote Reber’s first radio telescope.

Wheaton would also be a good answer; Grote Reber built his first radio telescope on his own (all the others are the result of efforts by institutions).

For ‘two out’, several answers are possible. For example, Seeberg Hill and Crawford Hill (the microwave region of the electromagnetic spectrum is not, necessarily, the same as the radio).

Congratulations to gopher65 and iantresman!

Check back next week for another Universe Puzzle!