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  2. Solar flare - Wikipedia

    en.wikipedia.org/wiki/Solar_flare

    Solar flares were first observed by Richard Carrington and Richard Hodgson independently on 1 September 1859 by projecting the image of the solar disk produced by an optical telescope through a broad-band filter. [50] [51] It was an extraordinarily intense white light flare, a flare emitting a high amount of light in the visual spectrum. [50]

  3. Solar particle event - Wikipedia

    en.wikipedia.org/wiki/Solar_particle_event

    Post-eruptive loops in the wake of a solar flare, image taken by the TRACE satellite (photo by NASA). In solar physics, a solar particle event (SPE), also known as a solar energetic particle event or solar radiation storm, [a] [1] is a solar phenomenon which occurs when particles emitted by the Sun, mostly protons, become accelerated either in the Sun's atmosphere during a solar flare or in ...

  4. July 2012 solar storm - Wikipedia

    en.wikipedia.org/wiki/July_2012_solar_storm

    Coronal mass ejection. First observed. July 23, 2012. ( 2012-07-23) Part of solar cycle 24. The solar storm of 2012 was a solar storm involving an unusually large and strong coronal mass ejection that occurred on July 23, 2012. It missed Earth by a margin of roughly nine days, as the Sun 's equator rotates around its own axis once over a period ...

  5. Wallpaper (computing) - Wikipedia

    en.wikipedia.org/wiki/Wallpaper_(computing)

    Wallpaper (computing) A wallpaper or background (also known as a desktop background, desktop picture or desktop image on computers) is a digital image (photo, drawing etc.) used as a decorative background of a graphical user interface on the screen of a computer, smartphone or other electronic device. On a computer, wallpapers are generally ...

  6. Battlefield illumination - Wikipedia

    en.wikipedia.org/wiki/Battlefield_illumination

    A modern LUU-2B flare at 1,000 feet altitude illuminates the ground at 5 lux in a radius of 1500 feet. Burn time is 4–5 minutes. The flare is 36 inches long, 4.9 inches in diameter, and weighs about 30 pounds. A similar design called LUU-19B can provide covert illumination in the near-infrared (IR) spectrum with virtually no visual signature.

  7. Cloudflare is taking a stand against AI website scrapers

    www.engadget.com/cloudflare-is-taking-a-stand...

    Wed, Jul 3, 2024 · 2 min read. ASSOCIATED PRESS. Cloudflare has released a new free tool that prevents AI companies' bots from scraping its clients' websites for content to train large language ...

  8. Wallpaper group - Wikipedia

    en.wikipedia.org/wiki/Wallpaper_group

    A wallpaper group (or plane symmetry group or plane crystallographic group) is a mathematical classification of a two-dimensional repetitive pattern, based on the symmetries in the pattern. Such patterns occur frequently in architecture and decorative art, especially in textiles, tiles, and wallpaper . The simplest wallpaper group, Group p 1 ...

  9. Pyrotechnic colorant - Wikipedia

    en.wikipedia.org/wiki/Pyrotechnic_colorant

    Sodium compounds glow yellow in a flame. A pyrotechnic colorant is a chemical compound which causes a flame to burn with a particular color. These are used to create the colors in pyrotechnic compositions like fireworks and colored fires. The color-producing species are usually created from other chemicals during the reaction.

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