This 4-minute video lesson looks at the predicted collision of the Milky Way Galaxy with Andromeda (forming "Milkomeda"). [Cosmology and Astronomy playlist: Lesson 37 of 85]
- Author:
- Khan, Salman
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This 20-minute video explains how Earth's tilt causes the seasons. [Cosmology and Astronomy playlist: Lesson 70 of 85]
- Author:
- Khan, Salman
This 4-minute video lesson looks at Hubble Telescope images of galaxies. [Cosmology and Astronomy playlist: Lesson 6 of 85]
- Author:
- Khan, Salman
This 11-minute video lesson looks at Hubble's Law. [Cosmology and Astronomy playlist: Lesson 26 of 85]
- Author:
- Khan, Salman
This 11-minute video lesson looks at intergalactic scale or the distance between galaxies. [Cosmology and Astronomy playlist: Lesson 5 of 85]
- Author:
- Khan, Salman
This 10-minute video lesson provides a basic introduction to light and electromagnetic radiation. [Cosmology and Astronomy playlist: Lesson 68 of 85]
- Author:
- Khan, Salman
This 11-minute video lesson works through a calculation for K-Ar dating (it is good to have some prior experience with e and logarithms to understand). [Cosmology and Astronomy playlist: Lesson 80 of 85]
- Author:
- Khan, Salman
This 7-minute video lesson looks at the lifecycle of massive stars (stars with masses greater than 9 times the sun). [Cosmology and Astronomy playlist: Lesson 27 of 85]
- Author:
- Khan, Salman
This 7-minute video lesson explains what parallax is and how it is used to determine distances between stars. [Cosmology and Astronomy playlist: Lesson 21 of 85]
- Author:
- Khan, Salman
This 8-minute video lesson defines parsec a unit of distance used in astronomy. [Cosmology and Astronomy playlist: Lesson 25 of 85]
- Author:
- Khan, Salman
This 12-minute video lesson clarifies the effect of axial precession on the calendar and the date of perihelion and aphelion. [Cosmology and Astronomy playlist: Lesson 73 of 85]
- Author:
- Khan, Salman
This 2-minute video lesson provides a correction to the previous video about quasars. [Cosmology and Astronomy playlist: Lesson 36 of 85]
- Author:
- Khan, Salman
This 9-minute video lesson discusses quasars. [Cosmology and Astronomy playlist: Lesson 35 of 85]
- Author:
- Khan, Salman
This 17-minute video lesson discusses the radius of the observable universe. [Cosmology and Astronomy playlist: Lesson 8 of 85]
- Author:
- Khan, Salman
In this 11-minute video lesson Sal makes random predictions for the year 2060. [Cosmology and Astronomy playlist: Lesson 85 of 85]
- Author:
- Khan, Salman
This 10-minute video discusses redshift and the Doppler Effect. [Cosmology and Astronomy playlist: Lesson 10 of 85]
- Author:
- Khan, Salman
This 8-minute video lesson examines the scale of distance from the solar system to the closest stars. [Cosmology and Astronomy playlist: Lesson 3 of 85]
- Author:
- Khan, Salman
This 13-minute video lesson examines the size and scale of the solar system. [Cosmology and Astronomy playlist: Lesson 2 of 85]
- Author:
- Khan, Salman
This 13-minute video lesson examines the scale of our galaxy. [Cosmology and Astronomy playlist: Lesson 4 of 85]
- Author:
- Khan, Salman
This 11-minute video lesson attempts to comprehend the size of the universe and the scale of the large. [Cosmology and Astronomy playlist: Lesson 57 of 85]
- Author:
- Khan, Salman