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This article is a list of notable unsolved problems in astronomy. Problems may be theoretical or experimental. Theoretical problems result from inability of current theories to explain observed phenomena or experimental results. Experimental problems result from inability to test or investigate a proposed theory.
This glossary of astronomy is a list of definitions of terms and concepts relevant to astronomy and cosmology, their sub-disciplines, and related fields. Astronomy is concerned with the study of celestial objects and phenomena that originate outside the atmosphere of Earth. The field of astronomy features an extensive vocabulary and a ...
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A word search. A word search, word find, word seek, word sleuth or mystery word puzzle is a word game that consists of the letters of words placed in a grid, which usually has a rectangular or square shape. The objective of this puzzle is to find and mark all the words hidden inside the box. The words may be placed horizontally, vertically, or ...
Wonderword is a word search puzzle, still created by hand, with a solution at the end. All the words in the grid connect and the remaining letters spell out the answer. The puzzles are either in a 15×15 or 20×20 grid. [1] Each puzzle has a title, theme, solution number and wordlist.
DOWNHILL: The DOWN-most word of each vertical theme answer can be paired with the word HILL to make the name of a place: BUNKER HILL, BEACON HILL, and CHAPEL HILL. Today's crossword theme comes ...
[3] [4] [5] Based on strict dictionary definitions, "astronomy" refers to "the study of objects and matter outside the Earth's atmosphere and of their physical and chemical properties", [6] while "astrophysics" refers to the branch of astronomy dealing with "the behavior, physical properties, and dynamic processes of celestial objects and ...
Challenging your brain with printable word searches is fun all year long, but these holiday word searches are sure to get you in the spirit and help you celebrate. You can print out these free ...