the sun illuminates the earth
21Zhang Heng — For other uses, see Zhang Heng (disambiguation). This is a Chinese name; the family name is Zhang. Zhang Heng (張衡) Born …
22light — light1 lightful, adj. lightfully, adv. /luyt/, n., adj., lighter, lightest, v., lighted or lit, lighting. n. 1. something that makes things visible or affords illumination: All colors depend on light. 2. Physics …
23Zhang Heng — ██████████75  …
24Judaism — /jooh dee iz euhm, day , deuh /, n. 1. the monotheistic religion of the Jews, having its ethical, ceremonial, and legal foundation in the precepts of the Old Testament and in the teachings and commentaries of the rabbis as found chiefly in the… …
25extraterrestrial life — Introduction life that may exist or may have existed in the universe outside of Earth. The search for extraterrestrial life encompasses many fundamental scientific questions. What are the basic requirements for life? Could life have arisen… …
26Sky brightness — This article is primarily about the brightness of the night sky. For daytime situations, please see Diffuse sky radiation and Rayleigh Scattering. The fact that the sky isn t absolutely dark at night can easily be observed. Were the sky (in the… …
27spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …
28Twilight — For other uses, see Twilight (disambiguation). Twilight at Riga Bridge …
29Navagraha — Graha (from Sanskrit ग्रह gráha seizing, laying hold of, holding[1]) is a cosmic influencer on the living beings of mother Bhumidevi (Earth). In Hindu astrology, the Navagraha (Sanskrit: नवग्रह, nine seizers or nine influencers) are some of these …
30Photon belt — Infobox Paranormalterms Image Caption = A Hubble Space Telescope image of the Pleiades. Usage = Terminology Name = Photon Belt Origin = Paul Otto Hesse (1961) Der Jüngste Tag Short = Additional Names = Photon Ring, Manasic Ring, golden nebula… …
