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The Perseids are a prolific meteor shower associated with the comet Swift–Tuttle that are usually visible from mid- July to late- August. The meteors are called the Perseids because they appear from the general direction of the constellation Perseus and in more modern times have a radiant bordering on Cassiopeia and Camelopardalis. Etymology.
Xi Persei has an apparent magnitude of +4.06 and is classified as a blue giant ( spectral class O7.5III). It is intrinsically 12,700 times brighter than the Sun with absolute magnitude −5.5 in the V band. If the ultraviolet light and light from other wavelengths that emanates from Menkib is included, its total bolometric luminosity is 263,000 ...
Lyrids. The April Lyrids are a meteor shower lasting from about April 15 to April 29 each year. The radiant of the meteor shower is located near the constellations Lyra and Hercules, near the bright star Vega. The peak of the shower is typically around April 22–23 each year. The source of the meteor shower are particles of dust shed by the ...
A meteor shower is a celestial event in which a number of meteors are observed to radiate, or originate, from one point in the night sky. These meteors are caused by streams of cosmic debris called meteoroids entering Earth's atmosphere at extremely high speeds on parallel trajectories.
GK Persei (also Nova Persei 1901) was a bright nova first observed on Earth in 1901. It was discovered by Thomas David Anderson, an Edinburgh clergyman, at 02:40 UT on 22 February 1901 when it was at magnitude 2.7. [ 9][ 10] It reached a maximum magnitude of 0.2, the brightest nova of modern times until Nova Aquilae 1918.
The Perseus molecular cloud ( Per MCld) is a nearby (~1000 ly) giant molecular cloud in the constellation of Perseus and contains over 10,000 solar masses of gas and dust covering an area of 6 by 2 degrees. Unlike the Orion molecular cloud it is almost invisible apart from two clusters, IC 348 and NGC 1333, where low-mass stars are formed.
Highest temperatures ever recorded. A world map showing areas with Köppen B classification (dry climates). The temperatures of the hot variants (BWh, BSh) of these climates have the potential to exceed 50 °C (122 °F) during the hottest seasons.
