Ancient Greek Timeline

Posted by gregole on February 22, 2016
Posted in: History, Uncategorized. Tagged: , . 4 Comments

While working my way through a plan to continue and eventually complete my review of The Histories by Herodotus I started getting stuck on all the names and dates; the places, the battles, the people, the customs;  not to mention the architecture, the sculptures, the poetry, the dramas, the pottery.  Yes, even the pottery made history.  The Greeks were awesome!5th century, the parthenon, the acropolis, greek architecture, ancient greece, athena parthenos, athena the virgin

http://www.history.com/topics/ancient-history/ancient-greece/pictures/greek-architecture/the-parthenon-at-dusk-3 Continue Reading

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Why Phi? – Neptune’s moon Triton and its neighbours

Posted by gregole on October 11, 2015
Posted in: Uncategorized. Leave a comment

This is somewhat, but not too terribly technical. It is extremely interesting and thought provoking.

Tallbloke's Talkshop

The orbit of Triton (red) is opposite in direction and tilted −23° compared to a typical moon's orbit (green) in the plane of Neptune's equator [image credit: Wikipedia] The orbit of Triton (red) is opposite in direction and tilted −23° compared to a typical moon’s orbit (green) in the plane of Neptune’s equator [image credit: Wikipedia]
Triton is the seventh largest moon in the solar system. Not only that, it has over 99% of the mass of all Neptune’s moons combined. Its retrograde orbit makes it unique among the large moons of the solar system, and it is also the coldest known planetary body at -235° C (-391° F).

Turning to the orbit numbers, and looking at Triton’s closest ‘inner’ (nearer to Uranus) neighbour Proteus and the next two ‘outer’ moons, we find these values (in days):
1.122d Proteus
5.877d Triton
360.13d Nereid
1879.08d Halimede

We’ll treat Proteus and Triton as a pair, and the same for Nereid and Halimede.
Nereid is over fifteen times further from Uranus than Triton is, so hardly a neighbour at all.

Looking…

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