Crash Course – Astronomy – 11: The Earth

This is the eleventh video of the Crash Course – Astronomy series, hosted by Dr. Phil Plait. This video takes a close look at the Earth and its internal structure.

From the video description:

Table of Contents:

  • Earth is a Planet 0:03
  • Layers of Earth 1:25
  • The Magnetic Field 5:10
  • Atmosphere and the Human Influence 6:14

Crash Course – Astronomy – 10: The Sun

This is the tenth video of the Crash Course – Astronomy series, hosted by Dr. Phil Plait. This video describes the structure and functioning of the enormous nuclear fusion reactor in our sky.

From the video description:

Table of Contents:

  • The Sun is a Star 1:28
  • Plasma’s Magnetic Fields 6:11
  • Sunspots, Solar Flares, and Coronal Mass Ejections 7:09
  • How the Earth Reacts 9:18

Crash Course – Astronomy – 9: Introduction to the Solar System

This is the ninth video of the Crash Course – Astronomy series, hosted by Dr. Phil Plait. This video introduces the star, planets, asteroids, and other known objects making up our solar system, and describes the basics of its formation.

From the video description:

Table of Contents:

  • Makeup of a Solar System 2:38
  • From Gas to a Disc 5:36
  • Planet Formation Depends on Distance to Sun 7:14
  • Motion of a System 8:21

Crash Course – Astronomy – 8: Tides

This YouTube video explains the phenomena of tides and tidal forces.

This is the eighth video of the Crash Course – Astronomy series, hosted by Dr. Phil Plait. This video describes tidal forces due to the differences in gravitational pull of one object on different parts of another object.

From the video description:

Table of Contents:

  • Gravity Over Distance 0:44
  • Tidal Force Parameters 1:35
  • Battle of the Bulges 2:55
  • Tidal Lock 6:17

Crash Course – Astronomy – 7: Gravity

This YouTube video describes the universal phenomenon of gravity.

This is the seventh video of the Crash Course – Astronomy series, hosted by Dr. Phil Plait. This video describes gravity and its effects in the visible universe, including here on Earth.

From the video description:

Table of Contents:

  • Gravity is a Force 2:17
  • Different Types of Orbit 3:41
  • Escape Velocity 5:30
  • Weightless Mass 7:03

Crash Course – Astronomy – 6: Telescopes

This YouTube video explains how telescopes work, and describes various types of telescopes.

This is the sixth video of the Crash Course – Astronomy series, hosted by Dr. Phil Plait. This video describes the basic principles of telescopes and how varieties of telescope designs function. Also included is a basic guide to purchasing telescopes for personal use. From the video description:

Table of Contents:

  • How Telescopes Work 1:07
  • Refractors vs Reflectors 2:50
  • Technology and the Light Spectrum 7:45

Crash Course – Astronomy – 5: Eclipses

This YouTube video describes solar and lunar eclipses, their causes, and their variations.

This is the fifth video of the Crash Course – Astronomy series, hosted by Dr. Phil Plait. From the video description:

Table of Contents:

  • Solar Eclipse 0:59
  • Lunar Eclipse 1:03
  • Moon’s Orbit 1:23
  • Size of the Earth and Moon 8:24

Crash Course – Astronomy – 4: Moon Phases

This YouTube video explains why the moon has phases and what their names are.

This is the fourth video of the Crash Course – Astronomy series, hosted by Dr. Phil Plait. From the video description:

Table of Contents:

  • Why the Moon Has Phases 0:36
  • Spheres in Orbit 1:05
  • Name of the Moon Phases 2:25
  • How We See It 7:48

Crash Course – Astronomy – 3: Cycles in the Sky

This YouTube video describes repeating patterns of changes in the sky.

This is the third video of the Crash Course – Astronomy series, hosted by Dr. Phil Plait. From the video description:

Table of Contents:

  • Naked Eye Observations 0:28
  • Constellations 3:09
  • The Color of Stars 2:44
  • View of the Stars 7:25

Crash Course – Astronomy – 2: Naked Eye Observations

This YouTube video describes what can be seen in the sky without aid of binoculars or telescopes.

This is the second video of the Crash Course – Astronomy series, hosted by Dr. Phil Plait. From the video description:

Table of Contents:

  • Naked Eye Observations 0:28
  • Constellations 3:09
  • The Color of Stars 2:44
  • View of the Stars 7:25