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  2. List of unsolved problems in astronomy - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    This article is a list of notable unsolved problems in astronomy. Problems may be theoretical or experimental. Theoretical problems result from inability of current theories to explain observed phenomena or experimental results. Experimental problems result from inability to test or investigate a proposed theory.

  3. Millennium Prize Problems - Wikipedia

    en.wikipedia.org/wiki/Millennium_Prize_Problems

    The Clay Mathematics Institute officially designated the title Millennium Problem for the seven unsolved mathematical problems, the Birch and Swinnerton-Dyer conjecture, Hodge conjecture, Navier–Stokes existence and smoothness, P versus NP problem, Riemann hypothesis, Yang–Mills existence and mass gap, and the Poincaré conjecture at the ...

  4. Celestial mechanics - Wikipedia

    en.wikipedia.org/wiki/Celestial_mechanics

    Celestial mechanics is the branch of astronomy that deals with the motions of objects in outer space. Historically, celestial mechanics applies principles of physics (classical mechanics) to astronomical objects, such as stars and planets, to produce ephemeris data.

  5. 101 Science Trivia Questions and Answers To Test Your ... - AOL

    www.aol.com/101-science-trivia-questions-answers...

    The trivia ranges from easy to hard and there are questions for kids and adults alike! Related: 324 Best Trivia Questions and Answers to Jumpstart Your Fun Game Night. 101 Best Science Trivia ...

  6. A Question and Answer Guide to Astronomy - Wikipedia

    en.wikipedia.org/wiki/A_Question_and_Answer...

    A Question and Answer Guide to Astronomy is a book about astronomy and cosmology, and is intended for a general audience. The book was written by Pierre-Yves Bely , Carol Christian , and Jean-Rene Roy , and published in English by Cambridge University Press in 2010.

  7. [100] [101] In fact, the most essential staple food crops on the planet, like wheat, maize, rice, soybeans and sorghum [102] [103] are wind pollinated or self pollinating, and only slightly over 10% of the total human diet of plant crops is dependent upon insect pollination. [102] Bees do not always die if they use their sting.

  8. Category:Unsolved problems in astronomy - Wikipedia

    en.wikipedia.org/wiki/Category:Unsolved_problems...

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

  9. Planetary science - Wikipedia

    en.wikipedia.org/wiki/Planetary_science

    Theoretical planetary astronomy is concerned with dynamics: the application of the principles of celestial mechanics to the Solar System and extrasolar planetary systems. Observing exoplanets and determining their physical properties, exoplanetology, is a major area of research besides Solar System studies. Every planet has its own branch.