💫
🌌
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🪐 KNOW PRIMARY · AGES 6–11

PLANETS &
ASTRONOMY

🪐 From Tiny Rocks to Massive Giants — Our Solar System!

📖 8 Planets 🆓 FREE + PRO ⏱️ 5 min per comic 🧠 Quiz included
💫
NEBULA
4.5 billion years ago
→
☀️
SUN FORMS
First light
→
🪨
DUST CLUMPS
Accretion disk
→
🌍
PLANETS FORM
Gravity wins
🌌 HOW THE SOLAR SYSTEM FORMED
TOPIC 07 · PLANETS & ASTRONOMY · NEBULA · 4.5 BILLION YEARS AGO
PAGE 1 OF 5 — THE NEBULA CLOUD
BEGINNING
A colorful nebula cloud of gas and dust slowly rotating in deep space 4.5 billion years ago
4.5 BILLION YEARS AGO
In the vast darkness of space, a giant cloud of gas and dust slowly rotated. This nebula was enormous — many light-years across! Gravity pulled everything inward, and the spinning increased. The cloud heated up as it compressed. This is how our solar system began!
COLLAPSING!
NEBULA
A giant cloud of gas and cosmic dust spreading across light-years of dark space
💫 Giant cloud of gas
🌀 And cosmic dust
GRAVITY
Gravity pulling the nebula cloud inward from all directions toward the center
📍 Invisible force pulling
↪️ Everything toward center
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