Crash Course
Crash Course Astronomy #3: Cycles in the Sky
In this Crash Course, students take a look at the cyclical phenomena at work in the universe.
Crash Course
Crash Course Astronomy #1: Introduction to Astronomy
The first episode of Crash Course Astronomy helps students answer the question, "What is astronomy?"
Crash Course
Crash Course Astronomy #42: The Big Bang, Cosmology, Part 1
Knowing that the universe is expanding, and how quickly it's expanding allows scientists to run the clock back 14 billion years to the way the universe began- with a bang. [13:23]
Crash Course
Crash Course Astronomy #41: Dark Matter
Find out that the matter we can actually observe in the universe isn't all there is. Galaxies and other large structures in the universe are created and shifted by a force we detect mostly indirectly, by observing its impact, dark...
Crash Course
Crash Course Astronomy #4: Moon Phases
This Crash Course on astronomy takes students through the cause and name of the Moon's phases.
Crash Course
Crash Course Astronomy #10: The Sun
Take a closer look at the two-octillion ton star that rules the solar system. Also, look at the sun's core, plasma, magnetic fields, sunspots, solar flares, coronal mass ejections, and what all of that means for Earth.
Crash Course
Crash Course Astronomy #43: Dark Energy, Cosmology, Part 2
Learn how dark energy accelerates the expansion of space. Find out about the theory that the universe will expand indefinitely and faster all the time. [11:22]
Crash Course
Crash Course Astronomy #45: Deep Time
Are the Universe's days are numbered? Learn about the expected fate of stars, protons, matter, and black holes. [15:15]
Crash Course
Crash Course Astronomy #8: Tides
Today Phil explores the world of tides, and looks at the relationship between tides and gravity, and how planets and their moons become tidally locked.
Crash Course
Crash Course Astronomy #2: Naked Eye Observations
Crash Course Astronomy invites students to head outside and take a look at all the incredible things that can be seen with the naked eye.
Crash Course
Crash Course Astronomy #46: Everything, the Universe and Life
In this final episode of Crash Course Astronomy, the host gives the course a send off with a look at some popular topics, and some of the big questions in Astronomy. [11:22]
Crash Course
Crash Course Astronomy #6: Telescopes
Phil Plait explains how telescopes work and offers up some astronomical shopping advice in this Crash Course episode.
Crash Course
Crash Course Astronomy #5: Eclipses
This crash course tackles the topic of eclipses. Learn about both the solar and lunar types. [10:32]
Crash Course
Crash Course Astronomy #9: Introduction to the Solar System
This Crash Course Astronomy episode takes a look at the explosive history of our cosmic backyard, and how the universe went from a giant ball of gas to the system of planets and other celestial objects.
Crash Course
Crash Course Astronomy #7: The Gravity of the Situation
Phil Plait looks at how gravity plays out across the universe in this Crash Course episode on Astronomy.