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  2. Panthenol - Wikipedia

    en.wikipedia.org/wiki/Panthenol

    Chemical formula. C 9 H 19 N O 4: Molar mass ... Molar mass: 205.254 g·mol −1 ... cosmetics, and personal-care products, panthenol is a moisturizer and humectant ...

  3. The 25 Best Eye Creams for Dark Circles, Vetted by ... - AOL

    www.aol.com/20-best-eye-creams-dark-165652102.html

    The formula also helps with puffiness and protects the eyes against blue light. The derm recommends applying one pump to cover both eyes and tapping it onto the upper and lower lids. $65 at dermstore

  4. Luminosity distance - Wikipedia

    en.wikipedia.org/wiki/Luminosity_distance

    The object's actual luminosity is determined using the inverse-square law and the proportions of the object's apparent distance and luminosity distance. Another way to express the luminosity distance is through the flux-luminosity relationship, = where F is flux (W·m −2), and L is luminosity (W). From this the luminosity distance (in meters ...

  5. Mass–luminosity relation - Wikipedia

    en.wikipedia.org/wiki/Mass–luminosity_relation

    The mass/luminosity relation is important because it can be used to find the distance to binary systems which are too far for normal parallax measurements, using a technique called "dynamical parallax". [8] In this technique, the masses of the two stars in a binary system are estimated, usually in terms of the mass of the Sun.

  6. The 100 best moisturizers tested and ranked, according ... - AOL

    www.aol.com/news/100-best-moisturizers-tested...

    We tested more than 135 face moisturizers over 4 months. Shop the 100 best moisturizers now, including top contenders from Cerave, Cetaphil and Glossier.

  7. Etendue - Wikipedia

    en.wikipedia.org/wiki/Etendue

    A consequence of the conservation of etendue is the brightness theorem, which states that no linear optical system can increase the brightness of the light emitted from a source to a higher value than the brightness of the surface of that source (where "brightness" is defined as the optical power emitted per unit solid angle per unit emitting ...