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  2. 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.

  3. 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.

  4. National Standard Examination in Astronomy - Wikipedia

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

    The basic objective of conducting this test is not focusing on merit but to involve as many students from the country to participate in the exam and try to show and expose their talent. Hence the selection to the stage II examinations i.e. Indian National Olympiad Examinations (INOs) is based on the following scheme. Students are divided into ...

  5. Astronomy - Wikipedia

    en.wikipedia.org/wiki/Astronomy

    Astronomy is a natural science that studies celestial objects and the phenomena that ... In the 21st century there remain important unanswered questions in astronomy.

  6. Cosmic distance ladder - Wikipedia

    en.wikipedia.org/wiki/Cosmic_distance_ladder

    The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects.

  7. Concept inventory - Wikipedia

    en.wikipedia.org/wiki/Concept_inventory

    The aims of the research include ascertaining (a) the range of what individuals think a particular question is asking and (b) the most common responses to the questions. Concept inventories are evaluated to ensure test reliability and validity. In its final form, each question includes one correct answer and several distractors.

  8. When is the winter solstice? A guide to the shortest day of ...

    www.aol.com/winter-solstice-guide-shortest-day...

    Head to our Just Curious section to see what else we can answer. This article originally appeared on USA TODAY: Winter solstice 2024: Here's when winter starts this year Show comments

  9. Astrometry - Wikipedia

    en.wikipedia.org/wiki/Astrometry

    Astrometry is a branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies. It provides the kinematics and physical origin of the Solar System and this galaxy, the Milky Way.