Your Child Knows the Planets — What Should They Learn Next?

Knowing the names of the planets is a wonderful beginning. But space learning can take children much further from recognising the Solar System to understanding gravity, scale, stars, galaxies and eventually the evidence scientists use to understand our universe.

Mercury. Venus. Earth. Mars. Jupiter. Saturn. Uranus. Neptune.

If you have a child who loves space, there's a good chance they can already reel off all eight. They might know that Jupiter is the biggest planet. That Saturn has rings. That Mars is called the Red Planet. That humans have walked on the Moon. Perhaps they can identify the planets from pictures faster than you can. And that's brilliant. But then comes an interesting question: What should they learn next?

Because there is a big difference between knowing facts about space and gradually developing an understanding of the science behind them.

Why do planets orbit the Sun?

Why don't we feel Earth moving?

Why does the Moon appear to change shape?

Why are there seasons?

How do we know how far away stars are?

What actually is a star?

Why do some stars eventually become black holes?

How can scientists claim the universe is expanding?

And how can we possibly know what happened billions of years ago?

These questions require children to begin connecting individual facts into something much bigger. And that's where space becomes such a powerful learning topic.

Knowing Facts Isn't the End of Learning

There is nothing wrong with factual knowledge. In fact, knowledge matters enormously. The more children know about a subject, the easier it becomes for them to understand new information about it. Imagine I tell a child: Mars has two moons: Phobos and Deimos. If they already understand what a planet is, what a moon is and where Mars sits within the Solar System, they have somewhere to attach that new information. If none of those ideas are familiar, the sentence requires much more explanation. Prior knowledge gives new knowledge somewhere to go.

This is one reason children's interests can be so valuable educationally. A child who has spent years fascinated by space may already have accumulated an impressive bank of knowledge. Our job isn't to say: "You already know the planets. Let's move onto something else."

It's to ask: "What can we build on top of what you already know?"

Move From Naming to Explaining

One useful shift is from questions that ask children to identify something towards questions that ask them to explain it. For example:

Naming - Which planet is closest to the Sun? Mercury.

Comparing - How is Mercury different from Earth? - Now the child has to consider characteristics.

Explaining - Why does Mercury experience such extreme temperatures? Now they need scientific knowledge.

Investigating- Would humans be able to survive on Mercury? What problems would we need to solve?

Now multiple pieces of knowledge need to come together. The subject hasn't changed. We're still talking about Mercury. But the thinking has become deeper. This progression is useful across almost every space topic.

Don't Rush Children Towards "Harder" Science

There is an important caveat. Deeper doesn't always mean older terminology. A five-year-old who knows all eight planets doesn't necessarily need to start learning about redshift. They may be ready to explore their existing knowledge in greater depth at an appropriate developmental level.

For example, they could: compare planet sizes, sort rocky planets and gas giants, investigate why we have day and night, observe the Moon, explore shadows, build a model, ask what astronauts need to survive, or investigate what happens when objects fall.

That is deeper learning too. Progression isn't simply giving younger children secondary-school content earlier. It's helping them think more carefully with knowledge appropriate to their stage.

So What Comes After Learning the Planets?

There isn't one perfect order, but there are several natural directions children's learning can take.

1. Understand Earth as a Planet

Children often learn about "the planets" as though Earth isn't really one of them. Earth becomes here. Space becomes out there. One useful next step is helping children see Earth as part of the same system. Ask:

Why is Earth a planet?

What shape is Earth?

Does Earth move?

How long does one rotation take?

How long does one orbit take?

Why do we experience day and night?

Why do we have a year?

How is Earth similar to the other planets?

How is it different?

This provides a foundation for understanding much more later.

2. Explore the Sun Properly

Young children often describe the Sun simply as something that is hot and bright. Eventually, they can begin to understand that the Sun is a star. That creates an excellent question: If the Sun is a star, why does it look so much bigger than all the other stars?

Now we're introducing distance. Children can explore: why the Sun appears to move across the sky, how sunlight creates shadows, why sunlight is important for life, how Earth orbits the Sun, and eventually what the Sun is made from and how it produces energy. The Sun becomes a bridge between early space learning and later astronomy.

3. Investigate the Moon

The Moon is particularly useful because children can actually observe it themselves. You don't need specialist equipment. Go outside. Look up. Return another night. What changed?

Children can begin investigating: the Moon's phases, its orbit around Earth, why we always see roughly the same side, its surface, craters, gravity, and human exploration. And importantly: the Moon does not produce its own visible light. It reflects sunlight. That single idea begins connecting astronomy with the science of light.

4. Stop Thinking of the Solar System as a Straight Line

Many diagrams show the planets neatly lined up: Mercury → Venus → Earth → Mars → Jupiter → Saturn → Uranus → Neptune.

That's useful for teaching order. But it can accidentally create misconceptions. The planets don't sit permanently in a row. They are moving around the Sun in their own orbits. Their distances from one another change. Their orbital periods differ enormously. And most textbook diagrams cannot show both planet size and distance accurately at the same scale. This creates an excellent learning opportunity.

Ask: Why aren't Solar System diagrams usually drawn to scale?

Then try making one. Children quickly discover the problem. Space is enormous.

5. Start Exploring Scale

This is where children's familiar planet knowledge can become mathematical.

How big is Earth compared with Jupiter?

How large is the Sun compared with Earth?

How far away is the Moon?

How far away is the Sun?

How long would different journeys take?

Younger children can compare: bigger / smaller, nearer / farther, shorter / longer

Older children can work with: kilometres, ratios, scale models, travel times, and eventually astronomical units and light-years.

Space gives enormous numbers a purpose.

6. Introduce Gravity as More Than "Things Fall Down"

Young children often first encounter gravity as: Gravity pulls things down.

That's a useful starting point. But eventually we need to expand it. "Down" depends on where you are. People in Australia aren't hanging from the bottom of Earth. Gravity pulls objects towards the centre of Earth. Then the question becomes much more interesting: If gravity pulls things towards Earth, why doesn't the Moon crash into us?

Now we're heading towards orbits. Children begin seeing that concepts they learned separately are actually connected. Planets. Moons. Gravity. Motion. Orbits. The Solar System begins becoming a system, rather than a collection of eight separate objects.

7. Move Beyond the Solar System

For many children, "space" initially means: Sun + Moon + eight planets. But our Solar System is an unimaginably tiny part of the universe. Eventually children can begin zooming out.

Earth

↓

Solar System

↓

Milky Way Galaxy

↓

Local Group

↓

larger cosmic structures

↓

observable universe

That change in scale can be extraordinary for children. It also introduces an important distinction: A solar system isn't a galaxy. And: A galaxy isn't the universe. These ideas are easily confused when children encounter space facts without a framework connecting them.

8. Discover What Stars Actually Are

Once children understand that the Sun is a star, we can begin comparing it with others.

Are all stars the same? No.

Stars vary in: mass, size, temperature, colour, brightness, and age.

Older learners can begin exploring how stars form and how they change throughout their lives. They can investigate: nebulae, main-sequence stars, red giants, white dwarfs, supernovae, neutron stars, and black holes. But importantly, stellar evolution isn't simply a list of stages to memorise. A star's mass matters. Different stars can follow different pathways. That's a much more powerful scientific idea.

9. Ask How We Actually Know Any of This

This is perhaps one of the most important shifts children can make.

Young children often ask: "What do we know about space?"

Older learners can increasingly ask: "How do we know?"

How do we know what the Sun is made from?

How do we know how far away stars are?

How do we know planets exist around other stars?

How do we know galaxies are moving away from us?

How do we know the universe was once hotter and denser?

We cannot travel to most of the things astronomers study. So scientists rely heavily on evidence carried by light. Children can eventually explore: telescopes,

spectra, wavelengths, redshift, and astronomical observations. Now they're not simply learning conclusions. They're learning about evidence.

10. Understand That Science Changes

Space is also a brilliant subject for showing children that scientific knowledge isn't a finished book of facts. Pluto is a particularly familiar example. Many adults learned: There are nine planets. Children today learn eight.

Did the Solar System change? No. Our classification did. As scientists discovered more objects beyond Neptune, they needed to reconsider how objects such as Pluto should be classified. That's science working. New evidence. New questions. Better definitions. Revised understanding.

Children need to know that changing a scientific explanation doesn't mean science has "failed". It means science is responsive to evidence.

11. Let Their Questions Become Investigations

A space-loving child probably has questions you never planned to teach. Use them.

"Could we live on Mars?" Investigate: atmosphere, temperature, water, gravity, food, radiation, oxygen, engineering.

"Why can't we land on Jupiter?" Investigate: gas giants, atmospheres, pressure, planetary structure.

"What would happen if the Sun disappeared?" Investigate: light, gravity, temperature, orbits, energy.

"Could there be aliens?" Investigate: conditions for life, liquid water, habitable zones, exoplanets, extremophiles, and what counts as evidence.

One question can cross several areas of learning.

Space Doesn't Have to Stay in the Science Box

One of the reasons space works so well for home education is that it naturally connects subjects. Take a question like: Could humans live on Mars?

Science- What conditions do humans need to survive?

Maths- How far away is Mars? How long could the journey take?

Geography- What is the Martian landscape like?

Design & Technology- Design a habitat.

Literacy- Write a proposal for a Mars settlement.

Computing- Program a rover route.

History- How has Mars exploration developed?

Ethics- Should humans settle another planet?

One question. Multiple disciplines. But importantly, those activities aren't simply space-themed decorations placed over unrelated work. The subjects are helping the child answer the question. That's meaningful cross-curricular learning.

Revisit Instead of Constantly Moving On

There is another temptation when a child knows a lot about space. We keep giving them more. New facts. New planets. New terminology. New topics. But learning also requires children to retrieve and revisit what they already know. Ask them again next week:

Why do we have day and night?

Why does the Moon appear to change shape?

Why do planets orbit the Sun?

What is the difference between a planet and a star?

Don't always give multiple-choice answers. Let them retrieve the explanation. Then revisit the same idea later in a new context. For example: First understand that gravity pulls objects towards Earth. Later explore gravity on the Moon. Later connect gravity with planetary orbits. Later connect gravitational force with mass and distance. The concept grows.

This Is What Progression Should Look Like

Imagine one question: What is a star?

A young child might learn: The Sun is a star. Stars produce their own light and heat.

Later: Stars are enormous balls of hot plasma. They appear small because they are extremely far away.

Later still: Stars generate energy through nuclear fusion.

Then: Stars differ in mass, temperature, luminosity and evolutionary stage.

Eventually: A star's position on a Hertzsprung–Russell diagram can help us understand its properties and stage of stellar evolution.

Same subject. Increasing depth. That's very different from endlessly collecting unrelated space facts.

From Planets to Physics: What Learning Can Look Like at Different Ages

This is why I don't think one generic "space workbook for children" can do the whole job. A child aged five and a learner aged thirteen may both adore space. But what they need educationally is completely different.

🪐 Ages 4–7: Build the Foundations

At KS1, the aim isn't to race children towards complicated astronomy. It's to establish strong foundations through short, accessible and practical learning.

Children can explore: the Sun, Earth, the Moon, the planets, day and night, light and shadows, astronauts, rockets, simple orbits, and space exploration. They can observe. Sort. Compare. Talk. Draw. Build. Experiment. Ask questions. At this stage, an adult can support much of the learning and conversation.

QFE KS1 Space Workbook: Ages 4–7

Does your child know the planets and want to discover what comes next?

The QFE Space Workbook turns early fascination with space into structured, age-appropriate learning through short activities, practical investigations and opportunities to talk, observe, create and explore. Designed for ages 4–7, it is ideal for adult-supported learning and children beginning to build their understanding of Earth, the Moon, the Sun, planets, rockets and the world beyond our planet. There is no need to complete everything on a page or rush through the workbook. Follow your child's curiosity, revisit activities and spend longer wherever they need it.

→ Explore the QFE Space Workbook for ages 4–7

Ages 7–12: Start Connecting the Science

By KS2, children can move beyond simply recognising objects and begin explaining relationships.

Why do we have day and night?

Why does the Moon have phases?

What causes an orbit?

How large is the Solar System?

What is gravity?

How do rockets work?

How do humans survive in space?

What is a star?

Children can work with greater independence and encounter a broader range of activities. Research. Reasoning. Writing. Calculation. Practical investigations. Comparison. Problem-solving. The aim is increasingly to help them connect what they know.

QFE KS2 Space Workbook: Ages 7–12

Ready to go beyond planet facts?

The QFE Space Workbook is designed for children aged 7–12 who are ready to investigate space in greater depth. Rather than simply memorising facts, children are encouraged to question, research, calculate, compare, explain and apply what they know across science and other areas of learning. With varied activities and different levels of challenge, children can explore space through multiple modes of learning while gradually developing greater independence.

→ Explore the QFE Space Workbook for ages 7–12

Ages 12–14: Move Into Astronomy, Cosmology and Physics

At KS3, "space" can become serious science.

Learners can begin exploring: astronomical units, light-years, stellar properties, Hertzsprung–Russell diagrams, stellar life cycles, galaxies, the Big Bang, cosmic microwave background radiation, redshift, and Newton's Laws in relation to rockets. Most importantly, they can begin asking:

What is the evidence?

Why do scientists believe the universe is expanding?

How can light tell us about distant stars?

How do we measure astronomical distances?

Why do stars evolve differently?

Now the learner isn't simply learning what scientists think. They're beginning to explore why.

QFE Space Workbook: Ages 12–14

For learners ready to move from the Solar System into the science of the universe. The QFE Space Workbook is designed for ages 12–14, taking space learning into deeper astronomy and physics. Learners explore astronomical distances, the Hertzsprung–Russell diagram, stellar life cycles, galaxies, evidence for the Big Bang, cosmic microwave background radiation, redshift and the physics behind rockets. The focus moves beyond remembering information towards interpreting evidence, applying scientific ideas and understanding how we know what we know about the universe.

→ Explore the QFE Space Workbook for ages 12–14

Which Space Workbook Does My Child Need?

Don't choose solely according to how many planet facts your child knows. Think about the type of thinking they're ready for.

And remember: age ranges are guides.

Children don't all develop at identical rates, and previous knowledge matters. The aim isn't to choose the workbook with the most difficult-looking content. It's to find the level that allows your child to understand, think and progress.

A Workbook Shouldn't Become a Race to the Final Page

This is particularly important to me. Buying a workbook doesn't mean you now need to complete three pages every Tuesday until it's finished.

If one activity reveals a gap, stop. Explore it.

If one question creates an hour-long conversation, have the conversation.

If a child wants to investigate something further, follow it.

If something isn't secure, revisit it.

And if they already understand something confidently, move forward. A workbook should provide structure without removing flexibility. That's especially valuable for home-educating and world schooling families. You can use the resource around the child rather than forcing the child through the resource.