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Space & Astronomy Classes for Teens

21 free space & astronomy classes for teens (Ages 13–17) on Wunder — short, fact-checked courses and lessons with narration and a quiz. Filter by age — each link is its own page, not a JavaScript toggle.

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Earth's Atmosphere and Carbon Dioxide

Discover what the air is really made of and how carbon dioxide helps keep our planet warm.

Atoms, Elements, and Compounds

From a single atom to the periodic table to water itself — learn how elements and compounds build every substance in the universe.

Circumference and Area of Circles

Meet pi, the number hidden in every circle, and use it to measure the distance around a circle (C = πd) and the space inside it (A = πr²).

Newton's Laws of Motion

Meet the three simple laws that explain how everything moves, from a seatbelt to a rocket, discovered by Isaac Newton.

Renewable and Non-Renewable Energy

Sort out the world's energy sources: which ones nature keeps refilling (solar, wind, hydro) and which limited fossil fuels we're burning — and why the difference matters.

Earth's Mass Extinctions

Five times in Earth's long history, life was nearly wiped out. Meet the Big Five mass extinctions, from the icy end-Ordovician to the asteroid that ended the dinosaurs, and see how the planet recovered each time.

The Sun: Our Star

An ordinary star 150 million kilometers away: fusion, sunspots, and the space weather that can black out a city.

Meteors, Meteorites & Shooting Stars

The real story of shooting stars: the vocabulary of meteoroids and meteorites, why showers happen, how to watch them, and the famous falls that carried amino acids and pieces of Mars to Earth.

Auroras: The Northern Lights

How the Sun paints the polar sky green and red — the documented physics of the aurora, from solar wind to glowing oxygen.

Telescopes: How We See the Universe

From Galileo's little tube to the gold mirrors of the James Webb Space Telescope — how humans learned to gather light and see the universe across the whole spectrum.

Moons of the Solar System

Volcanoes on Io, hidden oceans on Europa and Enceladus, methane lakes on Titan — a tour of the strange, active, and maybe-habitable moons circling our Solar System.

How Cold War rivalry launched humanity to the Moon in just 12 years.

Start a Business

Turn an idea into a real business the smart, lean way.

Einstein’s Ideas

How Einstein rewrote space, time, and gravity forever.

The Big Bang, dark matter, dark energy, and the fate of everything.

From our solar system to distant galaxies, learn how the cosmos works.

Coding with Python

Start coding with Python, the readable language behind apps and AI.

Money Skills for Teens

Budgeting, saving, and compound interest: money skills to start now.

From a single assassination to a global catastrophe that reshaped the world.

How greenhouse gases warm the planet, and what the science really shows.

The Space Race — told through real, archival public-domain images.

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