Question 1
Which happened earlier?
A
Paris Observatory founded
✓ Earlier
B
Royal Observatory Greenwich founded
Paris Observatory founded (21 June 1667)
came before
Royal Observatory Greenwich founded (10 August 1675)
Question 2
Which happened earlier?
A
Jodrell Bank Observatory founded
B
Lick Observatory completed
✓ Earlier
Lick Observatory completed (1 January 1888)
came before
Jodrell Bank Observatory founded (1 January 1945)
Question 3
Which happened earlier?
A
Arecibo Observatory opened
B
Mount Wilson Observatory founded
✓ Earlier
Mount Wilson Observatory founded (1 January 1904)
came before
Arecibo Observatory opened (1 November 1963)