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Earth and Space Science – Our Solar System (SS)

Mars Perseverance rover

Exploration of the Planets in the Solar System

Backgrounders

Learn about how spacecraft have helped us learn about our Solar System.

Pluto lit by a distant Sun

Meet Our Dwarf Planets

Backgrounders

Learn about the dwarf planets in our Solar System.

Jupiter’s atmosphere taken from NASA's Juno spacecraft

The Outer Solar System

Backgrounders

Learn about the amazing planets and moons of the outer Solar System.

Thomas Graham

Thomas Graham

Career Profiles

Research Scientist, Space Farming

Thomas Graham is a Professor at the University of Guelph.
Doctor pointing to a knee x-ray

Why a Trip to Outer Space Could Be Bad for Your Bones

STEM Explained

Astronauts can experience bone loss in space. To understand why, you need to know a bit about how bones are formed and maintained in your body.

ChaoticMind75 - iStock

Why is it colder in the winter even though the Earth is closer to the Sun?

Hands-on Activities

Learn why we have seasons in this hands on activity.

The planet Mars

What is your weight on another planet?

Hands-on Activities

Do you weigh the same on Jupiter as you do on Earth? Learn to calculate your weight on a different planet.

What would happen if a meteor hit Earth?

What would happen if a meteor hit Earth?

Hands-on Activities

Explore the effects of asteroid impacts in this hands on activity.

Hot sunrise in space

Temperature: On Earth and on the Space Station

Backgrounders

This backgrounder explains what temperature is, how it is measured, how it affects people, and how it is controlled on the International Space Station.

The rocky planets

The Inner Solar System

STEM Explained

Earth is covered in rocks. So are Mercury, Venus, Mars and the Moon. Does that mean the rocky planets are all the same?

Condensation on a window pane

Humidity on Earth and on the Space Station

Backgrounders

Humidity is an important part of life on Earth and life in space. This backgrounder explains what humidity is, how it is measured and how it affects us both mentally and physically.

compass pointing north

How can I tell which way is north at night?

Hands-on Activities

Do you like to look at the stars? What can you identify in the night sky? Try finding some important constellations tonight!

Canadian pilot

From Sky to Space

STEM Explained

Canadian astronauts Jeremy Hansen and David Saint-Jacques explain how learning to fly an aircraft prepared them for the challenges of living in space.

Robert Thirsk | Ancien astronaute de l’Agence spatiale canadienne

Robert Thirsk

Career Profiles

Former CSA Astronaut

Robert Thirsk is a Former CSA Astronaut.