Let The Light Let You Shine
Al of year 1 notes
Last Updated
05/31/21
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Astronomy
Chapter 1
Lesson 1
Astronomy
- It is the study of our universe. (planets, stars, moons, nebulae, galaxies, etc.)
- Astronomy is the phenomena that originate in space. (supernova explosions, gamma ray bursts, cosmic radiation, etc.)
- It is also the physics, chemistry and evolution of all the objects listed.
- Muggles consider astronomy to be a natural science.
The Solar System
- Earth is located within the Milky Way galaxy.
- In the Milky Way, there are billions of stars
- The milky way is comprised of eight planets, all of which orbit the Sun. (simply just meaning that all eight 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.
Two Parts of the Solar System
- Both are separated by the Asteroid Belt
Inner Solar System- Mercury, Venus, Earth, Mars.
Outer Solar System- Jupiter, Saturn, Uranus, Neptune.
Asteroid Belt
- Located between Mars and Jupiter.
- It is made up of over 7,000 asteroids
- Orbits the Sun
- Contains asteroids of various shapes and sizes.
Star
- A star is a ball of hydrogen and helium that has enough mass to maintain nuclear fusion at its core.
- It’s the nuclear fusion that makes the star luminous in our night sky.
- Since the beginning of recorded time, stars have played a large role in religion and even navigation.
- The North Star was called the North Star because it always points you north.
- In ancient civilizations, people noticed patterns in the sky called constellations.
- In 1929, the International Astronomical Union officially recognized 88 constellations.
- To date, these are the only “official” constellations.
- The Big Dipper is not an official constellation because it is in an Ursa Major. It is not a constellation in its own right.
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The Zodiac signs; Aries, Aquarius, Cancer, Capricorn, Gemini, Leo, Libra, Pisces, Sagittarius, Scorpio (Scorpius), Taurus, and Virgo, are all along the equator. Astromancy, or astrology, is the study of these signs.