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  2. Astronomical filter - Wikipedia

    en.wikipedia.org/wiki/Astronomical_filter

    Solar filters are used to safely observe and photograph the Sun, which despite being white, may appear as a yellow-orange disk. A telescope with these filters attached can directly and properly view details of solar features, especially sunspots and granulation on the surface , [ 4 ] as well as solar eclipses and transits of the inferior ...

  3. Sky brightness - Wikipedia

    en.wikipedia.org/wiki/Sky_brightness

    Along the ecliptic plane there are enhancements in the zodiacal light where it is much brighter near the Sun and with a secondary maximum opposite the Sun at 180 degrees longitude (the gegenschein). In extreme cases natural zenith sky brightness can be as high as ~21.0 mag/arcsec², roughly twice as bright as nominal conditions.

  4. Golden hour (photography) - Wikipedia

    en.wikipedia.org/wiki/Golden_hour_(photography)

    Comparison of daylight versus the golden hour at Newbury Racecourse. In photography, the golden hour is the period of daytime shortly after sunrise or before sunset, during which daylight is redder and softer than when the sun is higher in the sky. The golden hour is also sometimes called the magic hour, especially by cinematographers and ...

  5. Solar plage - Wikipedia

    en.wikipedia.org/wiki/Solar_plage

    A plage / p l eɪ dʒ / is a bright region in the Sun's chromosphere, typically found in and around active regions. Historically, they have been referred to as bright flocculi, in contrast to dark flocculi, and as chromospheric faculae, in contrast to photospheric faculae. [1]

  6. Diffuse sky radiation - Wikipedia

    en.wikipedia.org/wiki/Diffuse_sky_radiation

    The blue sky spectrum contains light at all visible wavelengths with a broad maximum around 450–485 nm, the wavelengths of the color blue. Diffuse sky radiation is solar radiation reaching the Earth 's surface after having been scattered from the direct solar beam by molecules or particulates in the atmosphere .

  7. How to watch the Quadrantids, one of the strongest meteor ...

    www.aol.com/watch-quadrantids-first-meteor...

    Maximum meteor activity is expected to peak between 10 a.m. ET to 1 p.m. ET (15 to 18 ... of North America may see up to 25 meteors streaking across the skies, while those on the west coast could ...

  8. Costco Just Issued a Recall on This Popular Cold & Flu Medicine

    www.aol.com/costco-just-issued-recall-popular...

    You can also reach out to LNK International, the manufacturers of the over-the-counter medicine, at 1-800-426-9391 or email complaints-inquiries@lnkintl.com if you have any questions or concerns.

  9. Blue hour - Wikipedia

    en.wikipedia.org/wiki/Blue_hour

    Blue hour at the Old Cathedral of the Holy Name of Jesus, Bragança in Portugal. The blue hour (from French l'heure bleue; [1] [a] pronounced [lœʁ blø]) is the period of twilight (in the morning or evening, around the nautical stage) when the Sun is at a significant depth below the horizon.