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Perseus

Perseus is a constellation in the northern sky named after the Greek mythological hero Perseus. It was one of 48 listed by the 2nd-century astronomer Ptolemy and is among the 88 modern constellations defined by the International Astronomical Union. It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda and Cassiopeia. The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei, which shines at magnitude 1.79. It and many surrounding stars are members of the Alpha Persei Cluster. The best-known star is Algol, an eclipsing binary linked with ominous legends because of its variability, which is noticeable to the naked eye. Other notable features in Perseus include X Persei (a binary system containing a neutron star), GK Persei (a nova that peaked at magnitude 0.2 in 1901), the Double Cluster (comprised of two open clusters near each other in the sky), and the Perseus Cluster (a massive galaxy cluster). Perseus also hosts the radiant of the annual Perseids meteor shower. (Full article...)

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Volvariella bombycina

Volvariella bombycina is a species of edible mushroom in the family Pluteaceae. Though uncommon, it is widespread, often growing singly or in clusters in old knotholes and wounds in elms and maples.

Photograph: Hagen Graebner

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