How we found tilt of the earth? | Mr.GK
Channel: Mr. GK
Date: 2019-02-01

Jr GK Ep#1: https://youtu.be/dpWCFZoyjcg
Jr GK Ep#2: https://youtu.be/COu0YEyrmv8

Time travel Part 1: https://youtu.be/tgR8i9d9XNY
Time travel Part 2: https://youtu.be/utT9LFUteF8
Time travel Part 3: https://youtu.be/_KhINLMk7Tk

Aliens playlist: https://www.youtube.com/playlist?list=PLxdgXbLZbN8hLhqM3yPvrqrbceKuHSbK6

Blacklight
https://en.wikipedia.org/wiki/Blacklight

Things That Glow Under Ultraviolet Light
https://www.thoughtco.com/what-glows-under-a-black-light-607615


Coincidence that sun and moon seem same size?
https://earthsky.org/space/coincidence-that-sun-and-moon-seem-same-size


How does a Lock work (animation)
https://www.youtube.com/watch?v=UfsjTolrr8g
https://www.youtube.com/watch?v=smIdInCQ-kU

Types of lock:
https://securitysnobs.com/Types-Of-Locks.html


Earth tilt: Why Earth has 4 seasons
https://earthsky.org/earth/can-you-explain-why-earth-has-four-seasons
https://www.youtube.com/watch?v=e9MU4TouzII

Who (and when) discovered that the earth's axis is on a 23 degree tilt?
http://curious.astro.cornell.edu/physics/148-people-in-astronomy/history-of-astronomy/general-questions/995-who-and-when-discovered-that-the-earth-s-axis-is-on-a-23-degree-tilt-intermediate

Tycho Brahe, Johannes Kepler and Planetary Motion:
https://www.youtube.com/watch?v=x3ALuycrCwI

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