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The best videos, books, apps, and other learning resources our members recommend:

Astronomy Crash Course

9th - College | Online class, Online video/YouTube

Welcome to the first episode of Crash Course Astronomy. Your host for this intergalactic adventure is the Bad Astronomer himself, Phil Plait. We begin with answering a question: “What is astronomy?”

Free

Astronomy: Exploring Time and Space

7th - College | Online class

This course is designed for anyone who is interested in learning more about modern astronomy. We will help you get up to date on the most recent astronomical discoveries while also providing...

Free
Offers paid add-ons

Confronting The Big Questions: Highlights of Modern Astronomy

9th - College | Online class

An introduction to modern astronomy’s most important questions. The four sections of the course are Planets and Life in The Universe; The Life of Stars; Galaxies and Their Environments; The History...

Free
Offers paid add-ons

Cosmology and astronomy

7th - College | Online class

The Earth is huge, but it is tiny compared to the Sun (which is super huge). But the Sun is tiny compared to the solar system which is tiny compared to the distance to the next star. Oh, did we...

Free

Exoplanets

4th - 9th | Online video/YouTube

Learn about planets outside our solar system - what they might be like, how their seasons work, which might support life, and what kind of weather they have.

Free

From the Big Bang to Dark Energy

High School - College | Online class

We have learned a lot recently about how the Universe evolved in 13.7 billion years since the Big Bang. More than 80% of matter in the Universe is mysterious Dark Matter, which made stars and...

Free
Offers paid add-ons

Imagining Other Earths

9th - College | Online class

Are we alone? This course introduces core concepts in astronomy, biology, and planetary science that enable the student to speculate scientifically about this profound question and invent their own...

Free
Offers paid add-ons

Introduction to Black Holes

High School - College | Online resource

Black Holes (BHs) are the standard-bearers of cool Physics. Pop culture is full of references to these objects that are so powerful that nothing can escape them. A lot of Physicists have spent...

Free

Let's Go To Space!

Kindergarten - 3rd | Online video/YouTube

Explore our solar system with Jessi and Squeaks!

Free

NASA Kids' Club

Pre-K - 4th | Online resource

NASA provides a safe place for children to play as they learn about NASA and its missions. On this site, you will find games of various skill levels for children pre-K through grade 4. These games...

Free

Origins - Formation of the Universe, Solar System, Earth and Life

College | Online class

The Origins course tracks the origin of all things – from the Big Bang to the origin of the Solar System and the Earth. The course follows the evolution of life on our planet through deep...

Free

Our Solar System and Earth

4th - College | Online class

Ever since the Big Bang, the Universe has been drifting and expanding. The birth and death of stars leave an aftermath of galaxies, planets, and even living organisms. Watch the Earth transform...

Free

Reach for the Stars

4th - 8th | iPhone/iPad

Reach for the Stars presents early learners with a new approach to astronomy, one that educates and inspires in ways no conventional materials can hope to match. Produced by a collaboration between...

Free

Scale of the universe

7th - College | Online class

The Earth is huge, but it is tiny compared to the Sun (which is super huge). But the Sun is tiny compared to the solar system which is tiny compared to the distance to the next star. Oh, did we...

Free

Stars

3rd - 8th | Online video/YouTube

Learn all about stars in this series of 26 videos that covers topics from neutron stars to solar "tornadoes" to zombie stars.

Free

Stars, black holes and galaxies

High School - College | Online class

Stars begin when material drifting in space condenses due to gravity to be dense enough for fusion to occur. Depending on the volume and make-up of this material, the star could then develop into...

Free

The Universe

4th - College | Online class

Where did everything come from? Where are we heading? Big History tells the story of the Universe starting from the Big Bang, the formation of stars, planets, life on Earth, modern civilization —...

Free

WorldWide Telescope

7th - College | Product, Windows

The WorldWide Telescope is a rich visualization environment that functions as a virtual telescope, bringing together imagery from the best ground- and space-based telescopes to enable seamless,...

Free

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Astronomy: Learn about the stars, planets, moons, comets, asteroids, galaxies, nebulas, black holes, and other heavenly bodies that inhabit our universe..

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