Students discover how astronomers used the diameter of the Earth's orbit around the Sun as a baseline for estimating the distance of some stars, and the meaning of "Parsec" and "light year."
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New Review Determination of the Refractive Index of a Glass Block Using Snell's Law
Willebrord Snellius, an astronomer and mathematician, is known in the English speaking world as Snell. The third lesson in the 11-part series uses Snell's Law. Scholars locate an image formed in a glass block with a search pin. Then they...
11th - 12th Science CCSS: Adaptable
Stellar Distance Using Parallax
As a follow up to the Kahn Academy video on parallax, this video focuses on parallax as it relates to astronomical distance. Sal uses cardinal directions and the seasons to orient students in the proverbial night sky. After providing a...
12 mins 11th - Higher Ed Science
Stellar Parallax Clarification
A short clarification begins where the last video on stellar distance left off. Its intention is to clarify the trigonometry involved in using Parallax to determine stellar distance. The instructor uses the equations from the previous...
2 mins 11th - Higher Ed Science
New Review Stellar Parallax Interactive
How are scientists able to measure distances between stellar bodies? Turns out it's not very easy! Learners explore the process of trigonometric parallax as the method of determining these distances. They experience the same challenges...
9th - Higher Ed Science