![protrait de Julie Hlavacek-Larrond](/sites/default/files/styles/career_image/public/2022-09/Julie%20Hlavacek-Larrond.jpg?itok=rwVYG8Rx)
Julie Hlavacek-Larrondo (she/her)
Career Profiles
Astrophysicist and Associate professor
![SIlhouette of a figure examining stars with a telescope](/sites/default/files/2023-01/physics%20chapter%20header.jpg)
How could you build a refracting telescope using water as the lenses?
Hands-on Activities
Build your own refracting telescope using glasses of water as the lenses.
![Katie Mack headshot](/sites/default/files/styles/career_image/public/2023-01/Katie%20Mack.jpg?itok=OZ3DZ4TV)
Katie Mack (she/her)
Career Profiles
Hawking Chair in Cosmology and Science Communication
![Telescope under construction](/sites/default/files/styles/resource_card_image_360x300_/public/2022-12/Telescope%20under%20construction_0.jpg?itok=3jCfS0PW)
Seeing the Universe with the James Webb Telescope
Backgrounders
Learn about the James Webb telescope and Canada’s role in the mission.
![Lunar lander floating above the moon, with the Earth in the background](/sites/default/files/styles/resource_card_image_360x300_/public/2022-08/Untitled%20design%20%2812%29.png?itok=tAd3Suzb)
Let's Talk Space Exploration Resources
Backgrounders
Discover a set of resources to develop background knowledge on the topic of space exploration.
![The Jodrell Bank Lovell Telescope located in Cheshire, England](/sites/default/files/styles/resource_card_image_360x300_/public/2020-06/Jodrell_Bank_Lovell_Telescope.jpg?itok=TFL_abQu)
Telescopes and Astronomy
Backgrounders
Visible light is only part of what astronomers study. They use different types of telescopes to study the entire electromagnetic spectrum.
![Hubble Space Telescope as seen during a servicing mission in 2009](/sites/default/files/styles/resource_card_image_360x300_/public/2020-02/hubble_space_telescope.jpg?itok=eNoDBFx5)
Airborne & Space Telescopes
Backgrounders
Learn about telescopes that do their work high in Earth’s atmosphere and in space.
![Boy looking through telescope at night](/sites/default/files/styles/resource_card_image_360x300_/public/2020-02/telescope-boy-night.jpg?itok=13zWe-Od)
Optical Telescopes
Backgrounders
Learn about the history of telescopes and the function of refracting and reflecting optical telescopes.
![Radio Telescope array at night](/sites/default/files/styles/resource_card_image_360x300_/public/2020-02/radio-telescope-at-night.jpg?itok=Xj9MDhpb)
Radio Astronomy
Backgrounders
Learn about radio astronomy, a type of astronomy that studies objects in space using radio waves and radio telescopes.
![Adult and children looking through telescope](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/adult_and_children_looking_through_telescope.jpg?itok=eKeL_YGd)
The Optics of Telescopes
Backgrounders
Learn about telescopes, how they work & why they're important to astronomers.
![Why is everything so small down there?](/sites/default/files/2019-08/why-is-everything-so-small-down-there.jpg)
Why is everything so small down there?
Hands-on Activities
Explore how we see things far and near and from different angles. It's all about perspective!
![The Parkes Observatory in New South Wales, Australia](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Park_Observatory_NSW_Australia.jpg?itok=K11hu9qK)
The Search for Extraterrestrial Intelligence - and How You Can Help!
STEM Explained
When astronomers search for extraterrestrial life, they often have to listen for radio waves coming from deep space. If you’re interested, you can help!