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|Highscores (51 registered players)|
|1||Eoin||100%||0:01.4 min.||14 Mar, '09|
|2||Jonas||100%||0:01.7 min.||8 Jun, '11|
|3||American idol||100%||0:01.8 min.||28 Aug, '11|
|4||Cris51||100%||0:01.8 min.||18 Nov, '08|
|5||lydialace||100%||0:02.2 min.||24 Jul, '11|
|6||PieroTheCooliest||100%||0:02.3 min.||15 Dec, '08|
|7||LewisHamilton||100%||0:02.3 min.||18 Nov, '08|
|8||makropulos||100%||0:02.8 min.||23 Sep, '14|
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This is an online quiz called Astronomy: The internal structure of Neptune
There is a printable worksheet available for download here so you can take the quiz with pen and paper.
Discovered on September 23, 1846 Neptune was the first planet found by mathematical prediction rather than regular observation. Unexpected changes in the orbit of Uranus led astronomers to deduce the gravitational perturbation of an unknown planet.
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