![Radiation shielding garment on the International Space Station](/sites/default/files/styles/resource_card_image_360x300_/public/2020-02/ISS_radiation_shield_garment.jpg?itok=iWfQ6aCb)
Radiation and Human Space Exploration
STEM Explained
One of the greatest hazards that humans in space face is cosmic radiation. Learn what cosmic radiation is, why it's dangerous, and ways that we are looking at protecting humans in deep space.
![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
![Inside the Destiny Laboratory Module on board the International Space Station](/sites/default/files/styles/resource_card_image_360x300_/public/2019-12/Destiny_Module_Sound.jpg?itok=A-lv_XQ9)
Noise on Earth and on the International Space Station
Backgrounders
This backgrounder explains what noise is, how it is measured, and how it affects our hearing, wellness and more.
![Lighting inside the Destiny Laboratory Module](/sites/default/files/styles/resource_card_image_360x300_/public/2019-12/Lighting_Destiny_Module_Sleep.jpg?itok=0SQn_Sm7)
Light on Earth and on the International Space Station
Backgrounders
This backgrounder explains what light is, how it is measured, and how it affects people on Earth and astronauts on board the International Space Station.
![Condensation on the window of the Apollo 12 Lunar Module, November 1969](/sites/default/files/styles/resource_card_image_360x300_/public/2019-12/Condensation_window_Apollo_12.jpg?itok=KtlUs1RV)
Humidity on Earth and on the ISS
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](/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!
![Asteroids](/sites/default/files/styles/resource_card_image_360x300_/public/2019-12/Asteroids.jpg?itok=n6XI2gZ2)
Where Can We Find Asteroids and Comets?
Backgrounders
This backgrounder explains the difference between planets, dwarf planets and small solar system bodies, such as asteroids and comets.
![Screen capture from the video “Dealing With Asteroids and Other Space Hazards”](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Asteroids_and_space_hazards.jpg?itok=dCFoyV24)
Dealing with Asteroids and Other Space Hazards
STEM Explained
Find out how asteroids, space debris, and cosmic radiation can be dangerous, and how to monitor them and protect ourselves from these space hazards.
![Artist’s conception of NASA’s Space Launch System](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/NASA%27s_space_launch_system.jpg?itok=8GvpYCDs)
Escape Velocity
STEM Explained
Why do a baseball and a rocket need the same launch speed to get from Earth into space? It has to do with physics and gravitational force.
![Sylvain Laporte | President at Canadian Space Agency Sylvain Laporte](/sites/default/files/styles/career_image/public/6148_13.jpg?itok=UTsSpZqA)
Sylvain Laporte
Career Profiles
President (2015 - 2020)
![MARGARITA MARINOVA | SR. MARS DEVELOPMENT ENGINEER, SPACEX Margarita Marinova | Ingénieure principale de développement, SpaceX](/sites/default/files/styles/career_image/public/6023-1_13.jpg?itok=PAozxwdR)
Margarita Marinova
Career Profiles
SR. Mars Development Engineer
![Peter Scott | Independent Contractor Peter Scott | entrepreneur indépendant en informatique](/sites/default/files/styles/career_image/public/5930_13.jpg?itok=feRA0Vso)
Peter Scott
Career Profiles
Independent Contractor
![Franz Newland | Assistant Lecturer, Space Engineering Franz Newland | Assistant Lecturer, Space Engineering](/sites/default/files/styles/career_image/public/4582_13.jpg?itok=OdRQ1Itl)
Franz Newland
Career Profiles
Assistant Lecturer
![Robert Thirsk | Former CSA Astronaut Robert Thirsk | Ancien astronaute de l’Agence spatiale canadienne](/sites/default/files/styles/career_image/public/4430_13.jpg?itok=2kqfoV2V)
Robert Thirsk
Career Profiles
Former CSA Astronaut