← The Solar System

Chapter 1

The Sun and the rocky planets

The Sun holds more than 99 percent of the Solar System's mass and lights everything in it. Close to it orbit four small, rocky worlds: scorched Mercury, cloudy Venus, our blue Earth and red, dusty Mars.

11 cards · 🪐 planets in motion

StoryZap this chapter
See the 11 cards
  1. Glowing on the orbit: the smallest planetMercury
  2. Glowing on the orbit: Earth's cloudy neighbourVenus
  3. Glowing on the orbit: the third planetEarth
  4. Glowing on the orbit: the fourth planetMars
  5. Most abundant element in the SunHydrogen
  6. Process that powers the SunNuclear fusion
  7. How long sunlight takes to reach EarthAbout 8 minutes
  8. Average distance from Earth to the SunAbout 150 million km
  9. Tallest volcano on MarsOlympus Mons
  10. The two moons of MarsPhobos and Deimos
  11. Number of planets in the Solar System8