The New CAAO

What's New

CAAO 2023 Winners Results


We have finalized the results for the CAAO 2023. Please check the results here.


The top 12 students for the CAAO will be invited to the three-day national camp from June 27 - 29. We will send out more details regarding the national camp in an email.

CAC 2023 Results


We want to thank all the students for participating in the first Canadian Astronomy Competition. We will distribute the prize to top participants within the next couple of weeks. The results for the top five contests in each division have been posted here.


2022 Team Canada IAO Results


Congratulations to our 2022 IRAO teams. This year, William Deng received a Silver Medal and the best result in the practical round.


Beta Group (Senior Team)

- William Deng

- Emma Yao


Alpha Group (Junior Team)

- Zhengyi (Jenny) Wu

- Olivia Kay

- Lillian Li

2022 Team Canada IOAA Results


Congratulations to our 2022 IOAA teams. This year, Team Canada achieved its best result ever.


Daniel Yang – Gold Medal (ranked 5th in the world and 1st in the data analysis section)

Connor Wong – Silver Medal

Zander Li – Silver Medal

Hongyi Huang – Bronze Medal

Simon Wu – Honourable Mention

Yuehan Hu – Specialize Prize from the Georgian National Observatory

New Partners and Sponsors


We would like to express our sincere appreciation to Perimeter Institute for their generous support. Your support is essential to help us bringing astronomy and astrophysics education to more students across Canada.

Spiral Galaxy NGC 2841

A mere 46 million light-years distant, spiral galaxy NGC 2841 can be found in the northern constellation of Ursa Major. This deep view of the gorgeous island universe was captured during 32 clear nights in November, December 2021 and January 2022. It shows off a striking yellow nucleus, galactic disk, and faint outer regions. Dust lanes, small star-forming regions, and young star clusters are embedded in the patchy, tightly wound spiral arms. In contrast, many other spirals exhibit grand, sweeping arms with large star-forming regions. NGC 2841 has a diameter of over 150,000 light-years, even larger than our own Milky Way. X-ray images suggest that resulting winds and stellar explosions create plumes of hot gas extending into a halo around NGC 2841. via NASA

Dueling Bands of the Night

What are these two bands in the sky? The more commonly seen band is the one on the right and is the central band of our Milky Way galaxy. Our Sun orbits in the disk of this spiral galaxy, so that from inside, this disk appears as a band of comparable brightness all the way around the sky. The Milky Way band can also be seen all year -- if out away from city lights. The less commonly seem band, on the left, is zodiacal light -- sunlight reflected from dust orbiting the Sun in our Solar System. Zodiacal light is brightest near the Sun and so is best seen just before sunrise or just after sunset. On some evenings in the north, particularly during the months of March and April, this ribbon of zodiacal light can appear quite prominent after sunset. It was determined only this century that zodiacal dust was mostly expelled by comets that have passed near Jupiter. Only on certain times of the year will the two bands be seen side by side, in parts of the sky, like this. The featured image, including the Andromeda galaxy and a meteor, was captured in late January over a frozen lake in Kanding, Sichuan, China. via NASA