Difference between the particle "wa" and "ga"

In this lesson, I introduce the difference between the particle は(wa)and が(ga). <Example Sentences> つき　は　きれいだ。 つき　が　きれいだ。 *つき means a moon *きれい means beautiful For つき　は　きれいだ。it explains a moon in generalities. For つき　が　きれいだ。the situation would be I am looking at a moon with my wife. *は is used for an old information. *が is used for a new information. <Excerpt from an old tale "Momotaro"> むかしむかし、あるむら　に　おじいさん　と　おばあさん　が　すんで　いました。 あるひ、おじいさん　は　やま　へ　しばかり　に、 おばあさん　は　かわ　へ　せんたく　に　いきました。 Once upon a time, an old man and an old woman lived in a small village. One day the old man went to the mountain to gather firewood and the old woman went to the river to wash clothes. *が for a new information is translated into "a" or "an" in English *は for an old information is translated into "the" in English. Reference: 日本人のための日本語文法入門 (Introduction of Japanese Grammar for Japanese) https://www.amazon.co.jp/dp/B01M8GUXYE/ref=dp-kindle-redirect?_encoding=UTF8&btkr=1 All 9 Case Particles https://anchor.fm/yuya-sato/episodes/All-9-Case-Particles-eprp9v The Particle "wa" https://anchor.fm/yuya-sato/episodes/The-Particle-wa-en50i0 Instagram: https://www.instagram.com/yuyaman1986