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EXCELLENCE
Excellence Nature
EXCELLENCE NATURE

The Solar System, World by World

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LEVEL 1 · 0/3LEVEL 2 · 0/3LEVEL 3 · 0/3LEVEL 4 · 0/3LEVEL 5 · 0/3START
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A solar system you turn in 3D, and every world in it: the planets in order and at their true sizes, the Sun, Mercury's swings and Venus's greenhouse, Earth's oceans and the Moon's birth, rusty Mars, the asteroid belt and Ceres, Jupiter's storm and moons, Saturn's rings and its floating density, Uranus on its side, Neptune found by math, Pluto's heart, comets and Voyager 1 in interstellar space.

3h 07m5 constellations
AT THE SUMMIT, YOU WILL BE ABLE TO

01Name the planets in order and rank them by size

02Explain why Venus is hotter than Mercury

03Know each planet's signature fact

04Tell the asteroid belt, the Kuiper Belt and the Oort Cloud apart

05Follow Voyager 1 into interstellar space

Every lesson of The Solar System, World by World

15 lessons in 5 levels, about 3 hours. Level 1 is free.

Level 1The Sun's FamilyFree · 3 lessons
  1. A Tour of the Solar SystemPut the eight planets in order from the Sun, and tell the rocky ones from the giants.12 min
  2. Sizes Side by SideSee the true sizes of the planets next to each other, and next to the Sun.12 min
  3. Our StarKnow what kind of star the Sun is, how hot it is, and how far its light travels.13 min
Level 2The Rocky WorldsMembership · 3 lessons
  1. Mercury and VenusCompare the two planets closest to the Sun, and why the farther one is hotter.12 min
  2. Earth and the MoonKnow what makes Earth unique, and where the Moon came from.13 min
  3. Mars, the Red PlanetKnow why Mars is red, its record-breaking landmarks, and the signs of its watery past.13 min
Level 3The GiantsMembership · 3 lessons
  1. The Asteroid Belt and CeresKnow what the asteroid belt is, why no planet formed there, and its largest member.12 min
  2. Jupiter, the GiantKnow Jupiter's size, its storm, its short day and its four great moons.12 min
  3. Saturn and Its RingsKnow what Saturn's rings are made of, why Saturn could float, and its strangest moons.12 min
Level 4Ice Giants and BeyondMembership · 3 lessons
  1. Uranus, Tipped OverKnow how Uranus was found, why it's blue-green, and why it rolls around the Sun.12 min
  2. Neptune, Found by MathKnow how Neptune was discovered on paper, and its record winds.12 min
  3. Pluto and the Kuiper BeltKnow why Pluto became a dwarf planet, and what lies beyond Neptune.13 min
Level 5Comets, Voyager and the TestMembership · 3 lessons
  1. CometsKnow what comets are, why their tails point away from the Sun, and where they come from.13 min
  2. Voyager 1, Still GoingFollow Voyager 1 from Jupiter to interstellar space.12 min
  3. The Solar System TestUse the whole path: order, sizes, the Sun, every planet, dwarfs, comets and Voyager.14 min
FREE

Level 1 is open.

Membership opens every other level of this path.

See membership
AFTER THE CORE

Keep going where this path leads.

The Universe, ExplainedBeyond the Sun's family · 2h 59m
Planet Earth, ExplainedOur own world, inside and out · 3h 06m