flat disk
71Halo (religious iconography) — For other uses, see Halo (disambiguation). Jesus and nine of the Twelve Apostles depicted with Floating disk haloes in perspective (detail from The Tribute Money, illustrating Matthew 17:24 27, by Masaccio …
72Lambert azimuthal equal-area projection — The Lambert azimuthal equal area projection is a particular mapping from a sphere to a disk. It accurately represents area in all regions of the sphere, but it does not accurately represent angles. Intuitively, it gives a planar picture of the… …
73Poppet valve — A poppet valve is a valve consisting of a hole, usually round or oval, and a tapered plug, usually a disk shape on the end of a shaft also called a valve stem. The shaft guides the plug portion by sliding through a valve guide. In most… …
74eye, human — ▪ anatomy Introduction specialized sense organ capable of receiving visual images, which are then carried to the brain. Anatomy of the visual apparatus Structures auxiliary to the eye The orbit The eye is protected from mechanical injury… …
75magnetic disc — noun (computer science) a memory device consisting of a flat disk covered with a magnetic coating on which information is stored • Syn: ↑magnetic disk, ↑disk, ↑disc • Derivationally related forms: ↑diskette (for: ↑ …
76History of cartography — The Fra Mauro map, one of the greatest memorial of medieval cartography, was made around 1450 by the Venetian monk Fra Mauro. It is a circular world map drawn on parchment and set in a wooden frame, about two meters in diameter Cartography (from… …
77Dark matter halo — Simulated dark matter halo from a cosmological N body simulation A dark matter halo is a hypothetical component of a galaxy, which extends beyond the edge of the visible galaxy and dominates the total mass. Since they consist of dark matter,… …
78Cygnus X-1 — For other uses, see Cygnus X 1 (disambiguation). HDE 226868 HDE 226868 (not shown) is located next to the star η (lower center) in this map of constellation Cygnus …
79Lathe — A lathe (pronEng|ˈleɪð) is a machine tool which spins a block of material to perform various operations such as cutting, sanding, knurling, drilling, or deformation with tools that are applied to the workpiece to create an object which has… …
80Andromeda Galaxy — The Andromeda Galax …
