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  2. Exploring The Universe: 20 Astronomy Questions To Test Your ...

    www.aol.com/space-explorer-challenge-tackle-mind...

    Space has fascinated humanity for centuries – from the mystery of the stars to the groundbreaking discoveries that push the boundaries of our understanding.

  3. 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.

  4. 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.

  5. 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.

  6. [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.

  7. National Standard Examination in Astronomy - Wikipedia

    en.wikipedia.org/wiki/National_Standard...

    The paper consists of 48 single correct type and 12 multiple correct type questions. It has a time limit of 2 hours. There are questions from high school level physics, mathematics and some questions from general astronomy.

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