Featured Game

Landing Sequence

Fire thrusters to land safely on moons and planets. Each world has its real surface gravity — from the Moon to Mercury.

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SOLAR SYSTEM

Explore space through games. Real data from NASA, real physics, real fun.

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Trivia Games

Scale Detective

PLAY

Which planet is bigger? Which moon has more gravity? Compare celestial bodies across size, distance, temperature, and more. 20 questions, 5 seconds each.

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Planet Lineup

PLAY

Identify a mystery celestial body from progressive clues. Guess early for more points. Easy mode (8 planets) or Hard mode (planets, moons, and dwarf planets).

Planet ID

PLAY

Identify planets in an animated orbiting solar system. A planet name appears — click the right one. Learn the order from the Sun.

Interactive Games

Landing Sequence

PLAY

Fire thrusters to land safely on moons and planets. Each body has its real surface gravity. 8 levels from the Moon to Mercury.

Stats →

Gravity Slingshot

PLAY

Navigate a spacecraft through the solar system using real gravitational assists. Physics-based trajectory puzzle.

Orbit Keeper

SOON

Keep satellites in stable orbits by adjusting thrust and timing. Increasingly chaotic gravitational fields.

Data sourced from NASA Planetary Fact Sheets (public domain)

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Star Log

Space science, NASA data, and the stories behind the solar system

How Big Is the Solar System?

Mar 24 · Scale

If the Sun were a basketball in New York, Neptune would be a marble 2.5 miles away. The distances are beyond intuition.

How Do Spacecraft Land on Other Worlds?

Mar 25 · Engineering

From parachutes on Mars to harpoons on comets — every landing is a unique engineering puzzle.

The 8 Planets in Order

Mar 26 · Guide

Mercury to Neptune — sizes, distances, and the one mnemonic that actually works.

How to Identify Planets in the Night Sky

Mar 27 · Stargazing

Planets don't twinkle. That's your first clue. Here's how to spot all 5 visible planets.

Gravity Assists: How NASA Uses Planets as Slingshots

Mar 28 · Physics

Voyager used Jupiter's gravity to reach Saturn. The physics is elegant and counterintuitive.

Why Are Planets Round?

Mar 29 · Physics

Gravity vs. structural strength — and the threshold where lumpy asteroids become smooth spheres.

Mercury Facts: Closest Planet to the Sun

Mar 17 · Planets

A 610 °C day-night swing, an iron core 85% of its radius, and water ice hiding in polar craters.

Venus Facts: Earth's Evil Twin

Mar 18 · Planets

92 bar pressure, 465 °C surface, sulfuric acid clouds — the most hostile planet in the solar system.

Jupiter Facts: The Giant Planet

Mar 19 · Planets

1,321 Earths could fit inside. A 350-year-old storm. 95 moons. The king of planets.

Saturn Facts: The Ringed Planet

Mar 20 · Planets

Less dense than water, a hexagonal polar vortex, and Titan — a moon with its own atmosphere.

Uranus Facts: The Sideways Planet

Mar 21 · Planets

Tilted 98° on its axis, 13 faint rings, and seasons that last 21 Earth years.

Neptune Facts: The Windiest Planet

Mar 22 · Planets

2,100 km/h winds, theoretical diamond rain, and Triton — a captured Kuiper Belt world.

Mars Facts: The Red Planet

Mar 30 · Planets

Olympus Mons, Valles Marineris, subsurface water ice — Mars by the numbers.

Saturn's Rings: What Are They?

Mar 31 · Planets

Billions of ice particles, some as small as sand grains, some as large as houses.

Moon Phases Explained

Apr 1 · Guide

Why does the Moon change shape? It doesn't — we just see different amounts of sunlight on it.

Beyond Pluto: The 5 Dwarf Planets

Apr 2 · Deep Space

Pluto, Eris, Haumea, Makemake, Ceres — the worlds that redefined what it means to be a planet.

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