Skip to content
Cosmo Cadets

Issue 01 · 15 missions · Ages 7–12

Your flight manual
for the solar system

Read the mission pages, answer the questions, earn the badges. Every fact in here is a real one, and every single answer links to the science it came from.

Join the academy I have a username
Missions
15
Lesson pages
45
Questions
244
Badges
30
JUPITER SATURN URANUS NEPTUNE FIG. 01 — ORBITS NOT TO SCALE

Three true things

Pulled at random from the manual, just as a cadet would see them.

Fig. 02

A satellite 35,786 km up takes exactly 24 hours to orbit, so it appears to hang still above one point on Earth.

NASA Science — Satellites ↗
Fig. 03

Different astronomers mapped different canals on Mars, and some saw none at all — a sign the lines were in the eye, not on the planet.

NASA Science — Mars ↗
Fig. 04

Almost every element heavier than helium — including the carbon and iron in your body — was made inside stars.

NASA Science — Stars ↗

The missions

They open in order. Each one has three lesson pages and its own quiz.

  1. 01

    Our Star

    The Sun up close

  2. 02

    Earth's Moon

    The only other world we have walked on

  3. 03

    The Rocky Worlds

    Mercury, Venus, Earth and Mars

  4. 04

    The Giant Worlds

    Jupiter, Saturn, Uranus and Neptune

  5. 05

    Small Worlds

    Asteroids, comets and dwarf planets

  6. 06

    Humans in Space

    Rockets, spacesuits and life in orbit

  7. 07

    Stars and Galaxies

    The universe beyond our solar system

  8. 08

    Gravity and Orbits

    Why anything goes round anything

  9. 09

    How We Know

    Light, telescopes and evidence

  10. 10

    Is Anyone Out There?

    Other worlds, and the search for life

  11. 11

    The Night Sky

    Going outside and looking up

  12. 12

    Living Off Earth

    Going back to the Moon, and on to Mars

  13. 13

    Mars Up Close

    A day, a landscape, and a missing ocean

  14. 14

    Robots on Mars

    Sixty years of trying to land

  15. 15

    Mars Myths and Mysteries

    Canals, faces, and how to check a claim

How a mission runs

  1. 01

    Pick your tier

    Cadet, Pilot or Commander. It sets how hard the questions are, and you can change it any time.

  2. 02

    Read the pages

    Three short pages per mission. Marking one as read banks XP and moves you to the next.

  3. 03

    Fly the quiz

    Five questions at your tier. Every answer comes back with an explanation and a source link.

  4. 04

    Collect badges

    30 badges for reading, scoring, streaks and totals. They print onto your wall as you earn them.