shadow cone
11eclipse — eclipser, n. /i klips /, n., v., eclipsed, eclipsing. n. 1. Astron. a. the obscuration of the light of the moon by the intervention of the earth between it and the sun (lunar eclipse) or the obscuration of the light of the sun by the intervention …
12geometry — /jee om i tree/, n. 1. the branch of mathematics that deals with the deduction of the properties, measurement, and relationships of points, lines, angles, and figures in space from their defining conditions by means of certain assumed properties… …
13Hipparchus — (Greek polytonic|Ἵππαρχος; ca. 190 BC ndash; ca. 120 BC) was a Greek astronomer, geographer, and mathematician of the Hellenistic period.Hipparchus was born in Nicaea (now Iznik, Turkey), and probably died on the island of Rhodes. He is known to… …
14Lunar eclipse — For other uses, see Lunar eclipse (disambiguation). Not to be confused with Solar eclipse. The …
15Astronomical unit — This article is about unit of length. For the full system of units, see Astronomical system of units. 1 astronomical unit = SI units 149.60×10^6 km 149.60×10^9 m Astronomical units 4.8481 …
16List of solar eclipses in the 21st century — In the 21st century, 2001 to 2100 AD, there will be 224 solar eclipses of which 77 will be partial, 72 will be annular, 68 will be total and 7 will be hybrids between total and annular eclipses (see ). Of these, two annular and one total eclipse… …
17List of solar eclipses in the 20th century — This is a list of solar eclipses in the 20th century. During the period 1901 to 2000 there were 228 solar eclipses of which 78 were partial, 73 were annular (2 of which were off centre), 71 were total (3 of which were off centre) and 6 were… …
18Sundial — A sundial is a device that measures time by the position of the Sun. In common designs such as the horizontal sundial, the sun casts a shadow from its style (a thin rod or a sharp, straight edge) onto a flat surface marked with lines indicating… …
19List of Advanced Dungeons & Dragons 2nd edition monsters — See also: Lists of Dungeons Dragons monsters This is the list of Advanced Dungeons Dragons 2nd edition monsters, an important element of that role playing game.[1] This list only includes monsters from official Advanced Dungeons Dragons 2nd… …
20Dragon (Dungeons & Dragons) — In the Dungeons Dragons fantasy role playing game (D D), dragons are an iconic type of monstrous creature used as adversaries or, less commonly, allies of player characters. As a group, D D dragons are loosely based upon dragons from a wide range …
