Libration

Today on Wednesday’s Wonderful World of Wikipedia is the concept ofLibration. In astronomy libration (from the Latin verb libro -are “to balance, to sway”, cf. libra “scales”) refers to the various orbital conditions which make it possible to see more than 50% of the moon’s surface over time, even though the front of the Moon is tidally locked to always face towards the earth. As the orbital processes are repetitive, libration is manifested as a slow rocking back and forth (or up and down) of the face of the orbital body as viewed from the parent body, much like the rocking of a pair of scales about the point of balance.
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Wednesday’s Wonderful World Of Wikipedia: The Mpemba Effect

This time around on Wednesdays Wonderful World of Wikipedia, I present to you the Mpemba Effect. I been told many times that the Mpemba Effect actually existed. However, nobody was ever able to give me the name of it, they just told me that it was true. It goes against everything (which is very little, mind you) I know about thermodynamics so I have always blown it off as urban legend.

Wednesday’s Wonderful World Of Wikipedia: Bacon Number

This week on Wednesdays Wonderful World of Wikipedia is Bacon Number. The Bacon number of an actor or actress is the number of degrees of separation they have from actor Kevin Bacon, as defined by the game known as Six Degrees of Kevin Bacon. The computation of a Bacon number N for X is a “shortest path” algorithm. It involves computing the Bacon number for all film actors who X has acted with. Notably Bacon is not the most linkable actor. That honor goes to Rod Steiger. The average Steiger number in the acting community is 2.679. By contrast, the average Bacon number is 2.946.