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The Big Why: Space Edition

Solving the Universe's Weirdest Riddles

Join us on a cinematic journey across the cosmos. From the invisible forces holding our boots on the ground to the eerie silence of the vacuum, we explore the 'why' behind the stars. Perfect for curious minds ready to blast off into the unknown.

Science20 Topics • 47 min

Topics

Gravity: Why Don't We Fall Off the Earth?
Gravity3 min

Gravity: Why Don't We Fall Off the Earth?

Solve the mystery of the invisible 'hug' that keeps your feet on the ground and prevents the oceans from spilling into space.

FREE
Moon Phases: Why Does the Moon Change Shape?
Moon Phases3 min

Moon Phases: Why Does the Moon Change Shape?

Discover the cosmic light show that transforms a giant rock into crescents, halves, and glowing spheres.

FREE
Twinkling Stars: Why do stars 'blink' at us?
Atmospheric Science3 min

Twinkling Stars: Why do stars 'blink' at us?

Investigate the science of 'stellar scintillation' and why the stars dance for us while planets stay still.

FREE
The Red Planet: Why is Mars Red?
Planetary Science3 min

The Red Planet: Why is Mars Red?

Unlock the secret of the rusty world and find out why even the Martian sky looks different than ours.

FREE
Space Silence: Why is there no sound in space?
Acoustics & Physics3 min

Space Silence: Why is there no sound in space?

Explore the 'Silent Zone' of the universe and learn why space movies have been lying to you about explosions.

FREE
Saturn’s Rings: Why does it have a 'hula hoop'?
Planetary Wonders3 min

Saturn’s Rings: Why does it have a 'hula hoop'?

Solve the mystery of the beautiful rings around the gas giant and discover the 'dirty snowballs' that create them.

FREE
Black Holes: Why can't anything escape them?
Astrophysics3 min

Black Holes: Why can't anything escape them?

Step into the 'Event Horizon' and learn why these invisible giants are the strongest anchors in the universe.

FREE
Shooting Stars: Why do they streak across the sky?
Meteoroids3 min

Shooting Stars: Why do they streak across the sky?

Discover why these 'stars' aren't actually stars at all, but tiny space crumbs putting on a fiery show.

FREE
The Sun's Heat: How does it reach us through cold space?
Solar Energy3 min

The Sun's Heat: How does it reach us through cold space?

Solve the mystery of how heat travels through the freezing vacuum of space to warm our planet.

FREE
The Black Sky: Why isn't space full of light?
Cosmology3 min

The Black Sky: Why isn't space full of light?

Investigate 'Olbers' Paradox'—the mystery of why the sky is dark even though there are trillions of stars in every direction.

FREE
The Great Red Spot: Why does Jupiter have an 'eye'?
Planetary Weather3 min

The Great Red Spot: Why does Jupiter have an 'eye'?

Discover the solar system's most famous storm—a hurricane that has lasted for centuries and could swallow Earth whole.

FREE
Venus: Why is the second planet hotter than the first?
Atmospheric Pressure3 min

Venus: Why is the second planet hotter than the first?

Solve the mystery of why Venus is a scorching furnace even though Mercury is much closer to the Sun.

FREE
Leap Year: Why do we have a February 29th?
Time & Orbits3 min

Leap Year: Why do we have a February 29th?

Learn why we have to add an extra day to our calendar every four years to keep our seasons in line.

FREE
Weight in Space: Why do you weigh less on the Moon?
Gravity & Mass3 min

Weight in Space: Why do you weigh less on the Moon?

Discover the hidden difference between 'Mass' and 'Weight' and why you’d be a superhero on the Moon.

FREE
The North Star: Why doesn't it move?
Navigation3 min

The North Star: Why doesn't it move?

Solve the mystery of Polaris, the stable star that has guided sailors and explorers for centuries.

FREE
Neptune's Blue: Why is the farthest planet so bright blue?
Planetary Science3 min

Neptune's Blue: Why is the farthest planet so bright blue?

Discover why the windiest planet in our solar system looks like a deep blue marble and how its atmosphere acts like a color filter.

FREE
The Seasons: Why is it hot in summer and cold in winter?
Earth Science3 min

The Seasons: Why is it hot in summer and cold in winter?

Solve the mystery of why temperatures change throughout the year and debunk the myth of the Sun's distance.

FREE
Asteroid Belt: Why isn't there a planet between Mars and Jupiter?
Celestial Mechanics3 min

Asteroid Belt: Why isn't there a planet between Mars and Jupiter?

Learn about the ring of 'space rubble' that never quite became a planet and why Jupiter is the 'bully' of the neighborhood.

FREE
Sunsets on Mars: Why are they blue?
Atmospheric Optics3 min

Sunsets on Mars: Why are they blue?

Discover why the 'Red Planet' has blue sunsets and how Martian dust creates a beautiful mirror image of Earth's sky.

FREE
The Sun's Future: What happens when the Sun runs out of fuel?
Stellar Evolution3 min

The Sun's Future: What happens when the Sun runs out of fuel?

Investigate the lifecycle of our star and discover how it will transform from a yellow dwarf into a massive red giant.

FREE