- Jacques Descloitres, MODIS Land Rapid Response Team, NASA/GSFC
- These true- and false-color images of central Canada show the Great Slave Lake in the Northwest Territories (top) and Lake Athabasca to the southeast. Lake Athabasca straddles the border between Alberta (west) and Saskatchewan (east). A fire (red dot) is burning in Saskatchewan, and the snow capped Rocky Mountains cut through southwest Alberta at bottom left. In the false-color image, vegetation is green, water is dark blue, and ice (or snow) is light blue.
- Ptolemy (Wikipedia)
Claudius Ptolemy (/ˈtɒləmi/; Greek: Πτολεμαῖος, Ptolemaios; Latin: Claudius Ptolemaeus; c. 100 – c. 170 AD) was a Roman mathematician, astronomer, astrologer, geographer, and music theorist, who wrote about a dozen scientific treatises, three of which were of importance to later Byzantine, Islamic, and Western European science. The first is the astronomical treatise now known as the Almagest, although it was originally entitled the Mathēmatikē Syntaxis or Mathematical Treatise, and later known as The Greatest Treatise. The second is the Geography, which is a thorough discussion on maps and the geographic knowledge of the Greco-Roman world. The third is the astrological treatise in which he attempted to adapt horoscopic astrology to the Aristotelian natural philosophy of his day. This is sometimes known as the Apotelesmatika (lit. “On the Effects”) but more commonly known as the Tetrábiblos, from the Koine Greek meaning “Four Books”, or by its Latin equivalent Quadripartite.
