Astronomy is a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, and comets. (Wikipedia)

 

The moon (Vid - ENGLISH)

  • Description : “What is the moon made of, and how did it form? Learn about the moon's violent origins, how its phases shaped the earliest calendars, and how humans first explored Earth's only natural satellite half a century ago.”

  • Author - copyright : National geographic.

  • Reference : 26 July 2018

  • Hashtag : #astronomy, #moon,

solar system (Vid - ENGLISH)

  • Description : “How many planets are in the solar system? How did it form in the Milky Way galaxy? Learn facts about the solar system’s genesis, plus its planets, moons, and asteroids.”

  • Author - copyright : National geographic.

  • Reference : 30 August 2017

  • Hashtag : #astronomy, #solarsystem,