The Notes Of A Ravenclaw (Year 1)
written by Mallory Justus
This book includes all of my notes from all seven of my classes. *Note: This book is a work in progress.
Last Updated
05/31/21
Chapters
1
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446
Astronomy: Lesson 1
Chapter 1
- Astronomy is the study of our universe
- Includes celestial objects, phenomena that originate in space, and the physics, chemistry and evolution
- Phenomena includes: supernova explosions, gamma ray bursts, cosmic radiation, etc
- Celestial objects include: planets, stars, moons, nebulae, galaxies, etc.
- Muggles consider astronomy to be a natural science
- Earth is located within the Milky Way galaxy
- The Milky Way is comprised of eight planets, all of which orbit the Sun
- Orbit means that planets travel around the Sun in an elliptical rotation
- All of the planets move in a counter-clockwise direction, but they each go at their own place
- The Sun orbits the galactic center
- There are 2 parts to our Solar System; the Inner Solar System and the Outer Solar System
- The Inner Solar System includes Mercury, Venus, Earth, Mars
- The Outer Solar System includes Jupiter, Saturn, Uranus, Neptune
- Asteroid Belt is located between Mars and Jupiter
- Made up of over 7,000 asteroids
- Orbits the Sun, and contains asteroids of various shapes and sizes
- In the Milky Way galaxy, there are billions of stars
- A star is a ball of hydrogen and helium that has enough mass to maintain nuclear fusion at its core
- Nuclear fusion that makes the star luminous in our night sky
- Stars have played a large role in religion and navigation
- North Star always points you north
- In 1929, the International Astronomical Union officially recognized 88 constellations
- Big Dipper is not an official constellation because the Big Dipper is found within the constellation of Ursa Major
- Twelve constellations were picked out from all the other constellations to make up the Zodiac
- Aries, Aquarius, Cancer, Capricorn, Gemini, Leo, Libra, Pisces, Sagittarius, Scorpio (Scorpius), Taurus, and Virgo
- Study of Zodiac in relation to determining one’s fortune or characteristic is astrology or astromancy
