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2. Viola sororia - Wikipedia

   en.wikipedia.org/wiki/Viola_sororia

   Viola sororia ( / vaɪˈoʊlə səˈrɔːriə / vy-OH-lə sə-ROR-ee-ə ), [ 5] known commonly as the common blue violet, is a short-stemmed herbaceous perennial plant native to eastern North America. It is known by a number of common names, including common meadow violet, purple violet, woolly blue violet, hooded violet, and wood violet.

3. Color–color diagram - Wikipedia

   en.wikipedia.org/wiki/Color–color_diagram

   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 ...

4. Viola appalachiensis - Wikipedia

   en.wikipedia.org/wiki/Viola_appalachiensis

   Viola allegheniensis L.K. Henry 1953, illegitimate homonym not Roem. & Schult. 1819. Viola walteri var. appalachiensis (L.K. Henry) L.E. McKinney. Viola appalachiensis, the Appalachian blue violet, also known as Appalachian violet and Henry's violet is a Viola native to the Appalachian Mountains in the Eastern United States. [2] [3]

5. What is a blue moon? Here's what one is and what the stars ...

   www.aol.com/blue-moon-heres-one-stars-100052924.html

   The full moon is the culmination of a lunar cycle, and typically, there is one per month, equating to 12 full moons a year. A "blue moon" refers to a second full moon that falls within the same ...

6. Color theory - Wikipedia

   en.wikipedia.org/wiki/Color_theory

   Color theory, or more specifically traditional color theory, is the historical body of knowledge describing the behavior of colors, namely in color mixing, color contrast effects, color harmony, color schemes and color symbolism. [ 1] Modern color theory is generally referred to as Color science. While there is no clear distinction in scope ...

7. B-type main-sequence star - Wikipedia

   en.wikipedia.org/wiki/B-type_main-sequence_star

   magni-. tude. (MV) A B-type main-sequence star (B V) is a main-sequence ( hydrogen -burning) star of spectral type B and luminosity class V. These stars have from 2 to 16 times the mass of the Sun and surface temperatures between 10,000 and 30,000 K. [ 1] B-type stars are extremely luminous and blue. Their spectra have strong neutral helium ...

8. Viola cucullata - Wikipedia

   en.wikipedia.org/wiki/Viola_cucullata

   The purple violet is a low-growing perennial herbaceous plant up to 20 cm (8 in) tall. The leaves form a basal cluster; they are simple, up to 10 cm (4 in) broad, with an entire margin and a long petiole. The flowers are violet, dark blue and occasionally white. with five petals. The fruit is a capsule 10–15 mm ( – in) long, which splits ...

9. Violet (color) - Wikipedia

   en.wikipedia.org/wiki/Violet_(color)

   On the RGB/CMY color wheel, violet is located between blue and magenta. Violet is closely associated with purple. In optics, violet is a spectral color (referring to the color of different single wavelengths of light), whereas purple is the color of various combinations of red and blue (or violet) light, [5] [6] some of which humans perceive as ...