Created by Sal Khan. Watch the next lesson: ...
Black Holes. Created by Sal Khan. Watch the next lesson: ...
Intergalactic Scale. Created by Sal Khan. Watch the next lesson: ...
The Paleolithic and Neolithic eras of the Stone Age. Created by Sal Khan. Watch the next lesson: ...
Cosmic Background Radiation. Created by Sal Khan. Watch the next lesson: ...
Discussion of the relatively recent changes in our ability as a species to shine light on our deep past. Created by Sal Khan. Watch the next lesson: ...
Quasars. Created by Sal Khan. Watch the next lesson: ...
Stellar Distance Using Parallax. Created by Sal Khan. Watch the next lesson: ...
Supernova (Supernovae). Created by Sal Khan. Watch the next lesson: ...
Gravity, Weak, Electromagnetic and Strong. Created by Sal Khan. Watch the next lesson: ...
Are Southern Hemisphere seasons more severe because of the eccentricity in Earth's orbit? Created by Sal Khan. Watch the next lesson: ...
Correcting the time difference calculation by taking into account that there is no year 0. Created by Sal Khan. Watch the next lesson: ...
How the Earth is a the byproduct of a local supernova. Created by Sal Khan. Watch the next lesson: ...
Parsec Definition. Created by Sal Khan. Watch the next lesson: ...
Supernova clarification. Created by Sal Khan. Watch the next lesson: ...
Created by Sal Khan. Watch the next lesson: ...
Sal's random predictions for the year 2060. Created by Sal Khan. Watch the next lesson: ...
Star Field and Nebula Images. Created by Sal Khan. Watch the next lesson: ...
Plate Tectonics -- Evidence of plate movement. Created by Sal Khan. Watch the next lesson: ...
Collision of the Milky Way Galaxy with Andromeda (forming "Milkomeda"). Created by Sal Khan. Watch the next lesson: ...
Scale of the Galaxy. Created by Sal Khan. Watch the next lesson: ...
Attempting to comprehend the scale of the large. Created by Sal Khan. Watch the next lesson: ...
Radius of Observable Universe. Created by Sal Khan. Watch the next lesson: ...
Thomas Malthus's views on population. Malthusian limits. Created by Sal Khan. Watch the next lesson: ...
Thinking about how we get Calories from the land limits human population densities. Created by Sal Khan. Watch the next lesson: ...
Taking a shot at estimating the number of detectable civilizations. Created by Sal Khan. Watch the next lesson: ...
Supermassive Black Holes. Created by Sal Khan. Watch the next lesson: ...
Apsidal Precession (Perihelion Precession). Created by Sal Khan. This is the last video in our Cosmology and Astronom subject! Now move on to our first video ...
How the indigenous Australians used fire to change their environment. Created by Sal Khan. Watch the next lesson: ...
Hubble's Law. Created by Sal Khan. Watch the next lesson: ...
A framework for thinking about how many detectable civilizations are out there. Created by Sal Khan. Watch the next lesson: ...
Life and photosynthesis start to thrive in the Archean Eon. Created by Sal Khan. Watch the next lesson: ...
First living things on land clarification (This video copyrighted under Create Commons Attribution and Share-Alike CC-BY-SA license). Created by Sal Khan.
Why our closeness to the sun does not dictate the seasons. Created by Sal Khan. Watch the next lesson: ...
Parallax in Observing Stars. Created by Sal Khan. Watch the next lesson: ...
Cosmic Background Radiation 2 - Redshift of the Cosmic Background Radiation. Created by Sal Khan. Watch the next lesson: ...
Created by Sal Khan. Watch the next lesson: ...
Difference between BC, BCE, AD and CE. A little bit about the birth of Jesus as well. Created by Sal Khan. Watch the next lesson: ...
Supermassive Black Holes. Created by Sal Khan. Watch the next lesson: ...
Quasar Correction. Created by Sal Khan. Watch the next lesson: ...
(Correction) Radius of Observable Universe. Created by Sal Khan. Watch the next lesson: ...
Plates Moving Due to Convection in Mantle. Created by Sal Khan. Watch the next lesson: ...
Plate Tectonics Introduction and Difference between crust and lithosphere. Created by Sal Khan. Watch the next lesson: ...
Another version of the stellar parallax introduction. Created by Sal Khan. Watch the next lesson: ...
Clarifying the effect of axial precession on the calendar and the date of perihelion and aphelion. Created by Sal Khan. Watch the next lesson: ...
From honey bees to cells, viruses, and atoms -- understanding the scale of the very small. Created by Sal Khan. Watch the next lesson: ...
Crust, mantle, core, lithosphere, asthenosphere, mesosphere, outer core, inner core. Created by Sal Khan. Watch the next lesson: ...
Refraction of Seismic Waves. Created by Sal Khan. Watch the next lesson: ...