This guide walks through the Solar System from the center outward, in a way that's just right for kids ages 8–12 — with a simple order to remember, fun facts, and a free printable worksheet for every part of space.
The planets in order (from the Sun outward)
Starting closest to the Sun and moving out, the eight planets are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
A classic way to remember the order is the sentence: My Very Educated Mother Just Served Us Noodles — the first letter of each word matches a planet, in order.
The Sun — the star at the center
Everything in the Solar System orbits the Sun, our own star. Here's a surprise: the Sun isn't 'on fire' — nothing is burning. It makes its light and heat by fusion, squeezing hydrogen into helium deep in its core.
The four rocky planets (Mercury, Venus, Earth, Mars)
The four planets closest to the Sun are small, solid worlds you could stand on — the rocky planets. A fun surprise: the hottest planet isn't the closest one. Venus, not Mercury, is the hottest, because its thick clouds trap the Sun's heat like a blanket.
The asteroid belt
Between Mars and Jupiter floats a ring of space rocks — asteroids, comets and meteors. Tip for young astronomers: a meteor is the bright streak we see when a space rock burns in the air, while a meteorite is the rock that survives and lands on the ground.
The four gas giants (Jupiter, Saturn, Uranus, Neptune)
Farther out are the huge gas giants — Jupiter, Saturn, Uranus and Neptune. You could never stand on one: they have no solid surface, so you would just sink into thicker and thicker gas with nowhere to land.
Many of these worlds have their own moons circling them — a moon orbits a planet, while a planet orbits the Sun.
Dwarf planets and the edge of the Solar System
Beyond Neptune lie the frozen dwarf planets. This is where Pluto lives. Pluto lost its planet title in 2006, when scientists decided a planet must 'clear its orbit' — and Pluto shares its space with many icy worlds, so today it is called a dwarf planet.
How to keep exploring space at home
The Solar System is just the beginning. Each topic above has a free printable worksheet, and the full Space activity books take your child from the Sun all the way to distant galaxies — with facts, activities and an Explorer Certificate to earn.
Print a worksheet, learn the order together, and quiz each other: can you name all eight planets from the Sun outward?