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2. List of most luminous stars - Wikipedia

   en.wikipedia.org/wiki/List_of_most_luminous_stars

   If this object were 10 parsecs away from Earth it would appear nearly as bright in the sky as the Sun (apparent magnitude −26.744). This quasar's luminosity is, therefore, about 2 trillion (10 12) times that of the Sun, or about 100 times that of the total light of average large galaxies like our Milky Way. (Note that quasars often vary ...

3. Philips Hue - Wikipedia

   en.wikipedia.org/wiki/Philips_Hue

   Philips Hue is a line of color-changing LED lamps and white bulbs which can be controlled wirelessly. The Philips Hue line of bulbs was the first smart bulb of its kind on the market. [ 3 ] The lamps are currently created and manufactured by Signify N.V. , formerly the Philips Lighting division of Royal Philips N.V. [ 1 ] [ 4 ]

4. Pi Andromedae - Wikipedia

   en.wikipedia.org/wiki/Pi_Andromedae

   π Andromedae in optical light. Pi Andromedae (Pi And, π Andromedae, π And) is the Bayer designation for a binary star [3] system in the northern constellation of Andromeda. With an apparent visual magnitude of 4.4, [2] it is visible to the naked eye. It is located approximately 580 light-years (180 parsecs) from Earth. [1]

5. List of brightest natural objects in the sky - Wikipedia

   en.wikipedia.org/wiki/List_of_brightest_natural...

   All objects are listed by their visual magnitudes, and objects too close together to be distinguished are listed jointly. Objects are listed by their proper names or their most commonly used stellar designation. This list does not include transient objects such as comets, or supernovae.

6. Starlight - Wikipedia

   en.wikipedia.org/wiki/Starlight

   The average color of starlight in the observable universe is a shade of yellowish-white that has been given the name Cosmic Latte. Starlight spectroscopy, examination of the stellar spectra, was pioneered by Joseph Fraunhofer in 1814. [ 3 ]

7. B-type main-sequence star - Wikipedia

   en.wikipedia.org/wiki/B-type_main-sequence_star

   This class of stars was introduced with the Harvard sequence of stellar spectra and published in the Revised Harvard photometry catalogue. The definition of type B-type stars was the presence of non-ionized helium lines with the absence of singly ionized helium in the blue-violet portion of the spectrum. All of the spectral classes, including ...