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GRB 221009A was an extraordinarily bright and very energetic gamma-ray burst (GRB) jointly discovered by the Neil Gehrels Swift Observatory and the Fermi Gamma-ray Space Telescope on October 9, 2022. The gamma-ray burst was ten minutes long, [ 1 ] but was detectable for more than ten hours following initial detection.
Brightest sunlight Luminance. This section lists examples of luminances, ... Frosted incandescent light bulb [5] [6] [12] 10 6: Mcd/m 2: 600 kcd/m 2:
This is a list of the brightest natural objects in the sky. This list orders objects by apparent magnitude from Earth , not anywhere else . This list is with reference to naked eye viewing; all objects are listed by their visual magnitudes, and objects too close together to be distinguished are listed jointly.
Red and purple areas indicate the brightest light-polluted skies while green and blue areas show darker sky locations. ... The best sales to shop today: You can still save big with 35% off Bissell ...
Brightest sunlight: 111,000 lux: Bright sunlight 109,880 lux: AM 1.5 global solar spectrum sunlight (= 1,000.4 W/m 2) [3] [circular reference] 20,000 lux: Shade illuminated by entire clear blue sky, midday 1,000–2,000 lux: Typical overcast day, midday 400 lux: Sunrise or sunset on a clear day (ambient illumination) <200 lux: Extreme of ...
(The S 10 unit is defined as the surface brightness of a star whose V-magnitude is 10 and whose light is smeared over one square degree, or 27.78 mag arcsec −2.) The total sky brightness in zenith is therefore ~220 S 10 or 21.9 mag/arcsec² in the V-band. Note that the contributions from Airglow and Zodiacal light vary with the time of year ...
This is a list of sources of light, the visible part of the electromagnetic spectrum.Light sources produce photons from another energy source, such as heat, chemical reactions, or conversion of mass or a different frequency of electromagnetic energy, and include light bulbs and stars like the Sun. Reflectors (such as the moon, cat's eyes, and mirrors) do not actually produce the light that ...
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