![Mars Perseverance rover](/sites/default/files/styles/resource_card_image_360x300_/public/2021-01/perseverance_rover.jpg?itok=XB-RXgBl)
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](/sites/default/files/styles/resource_card_image_360x300_/public/2021-01/pluto_and_sun.jpg?itok=Lrs0GRLo)
Meet Our Dwarf Planets
Backgrounders
Learn about the dwarf planets in our Solar System.
![Jupiter’s atmosphere taken from NASA's Juno spacecraft](/sites/default/files/styles/resource_card_image_360x300_/public/2021-01/above_jupiters_clouds.jpg?itok=uWE7qUix)
The Outer Solar System
Backgrounders
Learn about the amazing planets and moons of the outer Solar System.
![ChaoticMind75 - iStock](/sites/default/files/2019-08/why-is-it-colder-in-the-winter-even-though.jpg)
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](/sites/default/files/2019-10/Mars.png)
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?](/sites/default/files/2019-08/what-would-happen-if-a-meteor-hit-the-earth_0.jpg)
What would happen if a meteor hit Earth?
Hands-on Activities
Explore the effects of asteroid impacts in this hands on activity.
![The rocky planets](/sites/default/files/styles/resource_card_image_360x300_/public/2019-11/Rocky_planets.jpg?itok=5IsUrgOh)
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?
![Full moon](/sites/default/files/styles/resource_card_image_360x300_/public/2019-12/full-moon.jpg?itok=NubbtzMy)
Moon: Phases
Picture Collections
8 images of different lunar phases showing the portion of the Moon lit by the Sun as the Moon orbits the Earth and as seen by us on Earth
![compass pointing north](/sites/default/files/2020-04/compass-pointing-to-north.jpg)
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!