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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. Crickler 2: Daily Word Puzzle is a twist on crosswords that's ...

    www.aol.com/news/2012-07-20-crickler-2-ios...

    The iTunes description for Crickler 2 states that this take on the crossword puzzle genre is an "adaptive" experience, that automatically adjusts itself to your own skill level and knowledge.

  4. 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]

  5. 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

  6. 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 ]

  7. List of puzzle topics - Wikipedia

    en.wikipedia.org/wiki/List_of_puzzle_topics

    Crossword puzzle; Cryptic crossword; Cryptogram; Maze. Back from the klondike; Ball-in-a-maze puzzle; Mechanical puzzle. Ball-in-a-maze puzzle; Burr puzzle; Word puzzle. Acrostic; Daughter in the box; Disentanglement puzzle; Edge-matching puzzle; Egg of Columbus; Eight queens puzzle; Einstein's Puzzle; Eternity puzzle; Fifteen puzzle; Fox ...

  8. Solar time - Wikipedia

    en.wikipedia.org/wiki/Solar_time

    On a prograde planet like the Earth, the sidereal day is shorter than the solar day. At time 1, the Sun and a certain distant star are both overhead. At time 2, the planet has rotated 360° and the distant star is overhead again (1→2 = one sidereal day). But it is not until a little later, at time 3, that the Sun is overhead again (1→3 = one solar day). More simply, 1→2 is a complete ...

  9. Discrepancy - Wikipedia

    en.wikipedia.org/wiki/Discrepancy

    Discrepancy of hypergraphs, an area of discrepancy theory; Discrepancy (algebraic geometry) Statistics. Discrepancy function in the context of structural equation models;