Khan Academy: Scale of Earth, Sun, Galaxy and Universe: Scale of Earth and Sun

Young scientists learn how to select a scale factor for a large scale model. Then they figure the scale for each of the planets and the distance between them. Finally, they construct a giant scale model of the solar system and answer...

The concept of the universe can be incredibly complex on both physical and mathematical levels. Yet Salman Khan can explain concepts that lead to conclusions about the universe's size. He uses intriguing diagrams and presents information...

Sal explains the Big Bang and the spatial concepts of infinity versus a 'sphere' of expanding matter in detail.

Sal makes a relatable comparison for pupils to understand the universe's relative size. The progression from a man's size to a galaxy's size is explained in terms of each object relative to the next. The multiple objects we can process...

Sal compares the distance of significant objects and the timeline of events in the universe on a scaled timeline across the screen.

Scale of the Galaxy is illustrated in this Khan Academy. [12:55]

An examination of a Hubble telescope image showing far away galaxies. [4:12]

Did you know it would take a jet plane 17 years to travel from the Earth to the Sun? This video lecture shows the scale of solar system by exploring the astronomical unit. Understand how the astronomical unit is used to measure the...

Here is an unusual comparison: the swimming conditions of a sperm cell and a sperm whale. Introduce your physics class to the Reynolds number by sharing this video comparison during your fluid mechanics unit. Afterward, teach them to...

Start your states of matter unit off right with an engaging video! Before scholars can write and balance equations or predict products, knowledge of the three main states of matter is essential. The first in a 14-part series...