28/4/2021 - Class

The solar system

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  1. What is that ? It is the gravitationally bound system of the Sun and the objects that orbit it (8 largest planets, smaller objects and the dwarf planets). Solar system is a part of Milky Way.
  2. Main components in solar system: sun and other 8 planets (orbiting around the sun) including:

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  1. Hiện tượng mà tất cả hành tinh trong quỹ đạo của hệ mặt trời cùng nằm trên một đường thẳng gọi là gì ? và xuất hiện bao lâu một lần ?

  2. Halley comet: [https://en.wikipedia.org/wiki/Halley's_Comet](https://en.wikipedia.org/wiki/Halley's_Comet)

  3. Standard candle: A standard candle is an astronomical object that has a known absolute magnitude. They are extremely important to astronomers since by measuring the apparent magnitude of the object we can determine its distance using the formula: m-M = 5 log d – 5.

Astronomy

A/ The origin

Constant rate of the extension

B/ Astronomy is inductive or deductive ?

It is deductive because it is based on the available theory and research about the quality of the planet to verify and make more research about the ...

Astrology

A/ The origin

  1. Observation: from from the book, the Zodiac, from the Greek narrative and myths,... generation of wisdom (it is similar to folk tale - we can tell because many folk tales have crazy plots) or personal observation. Once upon a time, people just looked into the start and do alchemy

  2. Reasoning