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Color–color diagram. A color–color diagram is a means of comparing the colors of an astronomical object at different wavelengths. Astronomers typically observe at narrow bands around certain wavelengths, and objects observed will have different brightnesses in each band. The difference in brightness between two bands is referred to as an ...
"The Star-Spangled Banner" is the national anthem of the United States. The lyrics come from the "Defence of Fort M'Henry", [2] a poem written by American lawyer Francis Scott Key on September 14, 1814, after he witnessed the bombardment of Fort McHenry by the British Royal Navy during the Battle of Baltimore in the War of 1812.
Star coloring has been introduced by Grünbaum (1973) . The star chromatic number of G is the fewest colors needed to star color G . One generalization of star coloring is the closely related concept of acyclic coloring, where it is required that every cycle uses at least three colors, so the two-color induced subgraphs are forests. If ...
The blue is "liberty blue" identical to the color in the United States flag field of stars. Since Arizona is a western state, the rays of the setting sun seemed appropriate. There are thirteen rays representing the original "thirteen colonies". The large copper star identifies Arizona as the largest producer of copper in the United States.
The following is a list of particularly notable actual or hypothetical stars that have their own articles in Wikipedia, but are not included in the lists above. BPM 37093 — a diamond star. Cygnus X-1 — X-ray source. EBLM J0555-57Ab — is one of the smallest stars ever discovered.
Print/export Download as PDF; ... Help. Type-A stars have a Class A spectral type, giving them a white color. Subcategories. This category has the following 9 ...
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