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2. Mizar - Wikipedia

   en.wikipedia.org/wiki/Mizar

   The multiple star system of Mizar (the double star on the right) and Alcor (left). The unrelated, fainter star Sidus Ludoviciana can be seen lower down. Mizar is a visual double with a separation of 14.4 arcseconds, each of which is a spectroscopic binary .

3. Wood flooring - Wikipedia

   en.wikipedia.org/wiki/Wood_flooring

   Wood flooring is a popular feature in many houses. Engineered wood flooring consists of two or more layers of wood adhered together to form a plank. Typically, engineered wood flooring uses a thin layer of a more expensive wood bonded to a core constructed from cheaper wood. The increased stability of engineered wood is achieved by running each ...

4. Ejnar Hertzsprung - Wikipedia

   en.wikipedia.org/wiki/Ejnar_Hertzsprung

   He used the earlier classification system developed by Antonia Maury in his work. [4] The so-called "Hertzsprung–Russell Diagram" has been used ever since as a classification system to explain stellar types and stellar evolution. He also discovered two asteroids, one of which is 1627 Ivar, an Amor asteroid. [5]

5. List of architectural vaults - Wikipedia

   en.wikipedia.org/wiki/List_of_architectural_vaults

   A vaulting system employing carved Muqarna to corbel the span. Stellar vault – from Lierne (vault). A Rib vault including liernes and tiercerons forming a star shaped pattern of ribs. Stilted vault – See Ploughshare vault; Surbased vault – A vault with a cross section less than a semicircle, i.e. a segment.

6. James Webb Space Telescope - Wikipedia

   en.wikipedia.org/wiki/James_Webb_Space_Telescope

   The James Webb Space Telescope (JWST) is a space telescope designed to conduct infrared astronomy.As the largest telescope in space, it is equipped with high-resolution and high-sensitivity instruments, allowing it to view objects too old, distant, or faint for the Hubble Space Telescope. [9]

7. Photometry (astronomy) - Wikipedia

   en.wikipedia.org/wiki/Photometry_(astronomy)

   Magnitudes measured by photometers in some commonplace photometric systems (UBV, UBVRI or JHK) are expressed with a capital letter, such as "V" (m V) or "B" (m B). Other magnitudes estimated by the human eye are expressed using lower case letters, such as "v", "b" or "p", etc. [ 16 ] E.g. Visual magnitudes as m v , [ 17 ] while photographic ...