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  2. Solar neutrino problem - Wikipedia

    en.wikipedia.org/wiki/Solar_neutrino_problem

    The Sun performs nuclear fusion via the proton–proton chain reaction, which converts four protons into alpha particles, neutrinos, positrons, and energy. This energy is released in the form of electromagnetic radiation, as gamma rays , as well as in the form of the kinetic energy of both the charged particles and the neutrinos.

  3. Black Sun (symbol) - Wikipedia

    en.wikipedia.org/wiki/Black_Sun_(symbol)

    A leather belt with the black sun symbol as belt buckle. The item is from the 2010s. In the late 20th century, the Black Sun symbol became widely used by neo-fascist, neo-Nazi, [9] the far-right and white nationalists. The symbol often appears on extremist flags, t-shirts, posters, websites and in extremist publications associated with such groups.

  4. Sun - Wikipedia

    en.wikipedia.org/wiki/Sun

    The Sun is 1.4 million kilometers (4.643 light-seconds) wide, about 109 times wider than Earth, or four times the Lunar distance, and contains 99.86% of all Solar System mass. The Sun is a G-type main-sequence star that makes up about 99.86% of the mass of the Solar System. [26]

  5. Faint young Sun paradox - Wikipedia

    en.wikipedia.org/wiki/Faint_young_Sun_paradox

    The faint young Sun paradox or faint young Sun problem describes the apparent contradiction between observations of liquid water early in Earth's history and the astrophysical expectation that the Sun's output would have been only 70 percent as intense during that epoch as it is during the modern epoch. [1]

  6. File:The Sun by the Atmospheric Imaging Assembly of NASA's ...

    en.wikipedia.org/wiki/File:The_Sun_by_the...

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  7. Equation of time - Wikipedia

    en.wikipedia.org/wiki/Equation_of_time

    Animation showing equation of time and analemma path over one year.. The United States Naval Observatory states "the Equation of Time is the difference apparent solar time minus mean solar time", i.e. if the sun is ahead of the clock the sign is positive, and if the clock is ahead of the sun the sign is negative.

  8. The New York Times crossword - Wikipedia

    en.wikipedia.org/wiki/The_New_York_Times_crossword

    The number of words in the answer is not given in the clue—so a one-word clue can have a multiple-word answer. [ 28 ] The theme, if any, will be applied consistently throughout the puzzle; e.g., if one of the theme entries is a particular variety of pun, all the theme entries will be of that type. [ 9 ]

  9. Tests of general relativity - Wikipedia

    en.wikipedia.org/wiki/Tests_of_general_relativity

    The mere curvature of the path of a photon passing near the Sun is too small to have an observable delaying effect (when the round-trip time is compared to the time taken if the photon had followed a straight path), but general relativity predicts a time delay that becomes progressively larger when the photon passes nearer to the Sun due to the ...