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Effect of a triangular star filter. A cross screen filter, also known as a star filter, creates a star pattern using a very fine diffraction grating embedded in the filter, or sometimes by the use of prisms in the filter. The number of stars varies by the construction of the filter, as does the number of points each star has.
IC 405 (also known as the Flaming Star Nebula, SH 2-229, or Caldwell 31) is an emission and reflection nebula [1] in the constellation Auriga north of the celestial equator, surrounding the bluish, irregular variable star AE Aurigae. It shines at magnitude +6.0.
Two balls of fire would appear side by side on rainy nights at a pond known as the Misuma pond (Misumaike). It was said that a woman lent an osa (a guide for yarn on a loom) to another woman; when she returned to retrieve it, the two argued and fell into the pond. Their dispute became an atmospheric ghost fire, still said to be burning. [4]
Spectrum of the blue flame from a butane torch showing excited molecular radical band emission and Swan bands. Swan bands are a characteristic of the spectra of carbon stars, comets and of burning hydrocarbon fuels. [1] [2] They are named for the Scottish physicist William Swan, who first studied the spectral analysis of radical diatomic carbon ...
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Flames of charcoal. A flame (from Latin flamma) is the visible, gaseous part of a fire. It is caused by a highly exothermic chemical reaction made in a thin zone. [1] When flames are hot enough to have ionized gaseous components of sufficient density, they are then considered plasma. [vague] [2]
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