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Allan I Carswell Observatory

The Allan I. Carswell Observatory at York University promotes public engagement with astronomy through tours, live broadcasts, and educational programs, aiming to inspire curiosity and understanding of the universe for all ages.

Welcome to the York University Allan I Carswell Astronomical Observatory!We are running regular in person shows every Wednesday. These sessions will go ahead regardless of weather conditions.  Guests will be shown into the 1-m as well as our 60-cm domes from the inside. However, we will not be able to open the domes under rain and/or overcast conditions. The location is 'York University Petrie Science and Engineering' building and is given in the event. To enter the observatory go to the Petrie Science and Engineering building and go up to the 3rd floor. You will then just follow the signs for the 'Observatory' and your tour guide will meet you at the main door. Please keep in mind only one ticket booking per person is currently allowed.  Our regular online public viewing will continue every Monday evening from 9-10pm ET, with audio from York Universe podcast and broadcasting at:  <a href="https://www.youtube.com/user/YorkUObservatory/live" style="text-decoration-color:initial;user-select:auto;box-sizing:inherit">https://www.youtube.com/user/YorkUObservatory/live</a> On the final Friday of every month, we will be broadcasting live astronomy episodes on YouTube from 7:30pm ET on our TeleTube broadcast at: <a href="https://www.youtube.com/user/YorkUObservatory/live" style="text-decoration-color:initial;user-select:auto;box-sizing:inherit">https://www.youtube.com/user/YorkUObservatory/live</a> For weather updates and all information see our website at <a href="https://www.yorku.ca/science/observatory/" style="text-decoration-color:initial;user-select:auto;box-sizing:inherit">https://www.yorku.ca/science/observatory/</a>You can also email us at observe@yorku.ca! Happy viewing, hope to see you all either online or at one of our in person events.<img src="https://res.cloudinary.com/hxn9dbuhd/image/upload/v1696275419/ljxnj6l24et7sdz3hvqm.png" style="width:600px;display:block;vertical-align:top;margin:5px auto;text-align:center;position:relative;max-width:100%;cursor:pointer;padding:0px 1px;user-select:none;box-sizing:inherit" />

Allan I. Carswell Observatory, Tour, November 4th 2026

Welcome to the York University Spooky Stellar Sonatas Tour at the Allan I. Carswell Observatory! Join us on Wednesday, October 28th and take a listen to our Spooky Stellar Sonatas! At this collaboration between AICO and the YorkU Symphony Orchestra, you will be delighted by the musical talents of our students while experiencing a tour at the observatory. The event will be indoors, though make sure to wear layers. This event is all-ages and trick-or-treaters are welcome! The location&nbsp;is &#39;York University Petrie Science and Engineering&#39; building. To enter the observatory, go to the Petrie Science and Engineering building and then go up to the 3rd floor. You will then just follow the signs for the &#39;Observatory&#39; and your tour guide will meet you at the main door. Please keep in mind only one ticket booking per person is currently allowed.&nbsp; For more events:&nbsp;Our regular online public viewing will continue every Monday evening from 9-10pm ET, with audio from York Universe podcast and broadcasting at: &nbsp;<a fr-original-style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;" href="https://www.youtube.com/user/YorkUObservatory/live" style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;">https://www.youtube.com/user/YorkUObservatory/live</a> On the final Friday of every month, we will be broadcasting live astronomy episodes on YouTube from 7:30pm ET on our TeleTube broadcast at: <a fr-original-style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;" href="https://www.youtube.com/user/YorkUObservatory/live" style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;">https://www.youtube.com/user/YorkUObservatory/live</a> For weather updates and all information see our website&nbsp;at <a fr-original-style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;" href="https://www.yorku.ca/science/observatory/" style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;">https://www.yorku.ca/science/observatory/</a>You can also email us at observe@yorku.ca! Happy viewing, hope to see you all either online or at one of our in person events.<img src="https://res.cloudinary.com/hxn9dbuhd/image/upload/v1696275419/ljxnj6l24et7sdz3hvqm.png" style="width: 600px; display: block; vertical-align: top; margin: 5px auto; text-align: center; position: relative; max-width: 100%; cursor: pointer; padding: 0px 1px; user-select: none; box-sizing: inherit;" fr-original-style="width: 600px; display: block; vertical-align: top; margin: 5px auto; text-align: center; position: relative; max-width: 100%; cursor: pointer; padding: 0px 1px; user-select: none; box-sizing: inherit;" fr-original-class="fr-draggable">

Allan I. Carswell Observatory *Spooky Stellar Sonatas*, October 28th 2026

Welcome to the York University Arboretum Astronomy Tour Outdoors! This week the Allan I Carswell Observatory is running our outdoor&nbsp;Arboretum tours. Events are all-ages. These sessions will only go ahead if the weather is CLEAR. Masks are recommended.The location is the &#39;Arboretum Lane Parking Garage&#39; just across from the &#39;York University Petrie Science and Engineering&#39; building at York University. To enter the observatory atrium go to the top level of the parking garage and look for the wire enclosure with the telescopes. Please keep in mind only one ticket booking per person is currently allowed. We do not have in-person tickets. We will be hosting our free in-person tours every Wednesday (except some holidays). For more info, please visit our website: <a fr-original-style="" href="https://www.yorku.ca/science/observatory/" style="text-decoration-color: currentcolor; user-select: auto; box-sizing: inherit;" target="_blank">https://www.yorku.ca/science/observatory/</a> Our online events include, our regular online public viewing (OPV) every Monday evening from 9-10pm ET, (with audio from the York Universe) and; our Teletube broadcast on the last Friday of every month from 7:30pm ET on: <a fr-original-style="" href="https://www.youtube.com/user/YorkUObservatory/live" style="text-decoration-color: currentcolor; user-select: auto; box-sizing: inherit;" target="_blank">https://www.youtube.com/user/YorkUObservatory/live</a>&nbsp; For weather updates and all information see our website at <a fr-original-style="" href="https://www.yorku.ca/science/observatory/" style="text-decoration-color: currentcolor; user-select: auto; box-sizing: inherit;" target="_blank">https://www.yorku.ca/science/observatory/</a>&nbsp; You can also email us at observe@yorku.ca! Happy viewing, hope to see you all either online or at one of our in person events.

Allan I. Carswell Atrium Tour, October 21st 2026

Allan I. Carswell Atrium Tour, October 14th 2026

Welcome to the York University Sundial Tour! This week the Allan I Carswell Observatory is running our outdoor&nbsp;Sundial Tour. Tours are all-ages. These sessions will only go ahead if the weather is CLEAR because we need to be able to see the Sun to run this tour. Masks are recommended. The precise&nbsp;location is by the LIONS stadium in line with the observatory and the Lumbers building. From Petrie just walk towards LIONS/Lumbers and you cannot miss it (it should be over 10ft tall!).&nbsp; For more tours:&nbsp;We will be hosting our free in-person tours every Wednesday (except some holidays). For more info, please visit our website: <a fr-original-style="" href="https://www.yorku.ca/science/observatory/" style="text-decoration-color: currentcolor; user-select: auto; box-sizing: inherit;" target="_blank">https://www.yorku.ca/science/observatory/</a> Our online tours include, our regular online public viewing (OPV) every Monday evening from 9-10pm ET, (with audio from the York Universe) and; our Teletube broadcast on the last Friday of every month from 7:30pm ET on: <a fr-original-style="" href="https://www.youtube.com/user/YorkUObservatory/live" style="text-decoration-color: currentcolor; user-select: auto; box-sizing: inherit;" target="_blank">https://www.youtube.com/user/YorkUObservatory/live</a>&nbsp; For weather updates and all information see our website at <a fr-original-style="" href="https://www.yorku.ca/science/observatory/" style="text-decoration-color: currentcolor; user-select: auto; box-sizing: inherit;" target="_blank">https://www.yorku.ca/science/observatory/</a>&nbsp; You can also email us at observe@yorku.ca! Happy viewing, hope to see you all either online or at one of our in person tours.

Allan I. Carswell Observatory, Sundial Tour, October 7th 2026

Allan I. Carswell Atrium Tour, September 30th 2026

Allan I. Carswell Atrium Tour, September 23rd 2026

Welcome to the York University Allan I Carswell Astronomical Observatory! We are running regular in person shows every Wednesday. These sessions will go ahead regardless of weather conditions. &nbsp;Guests will be shown into the 1-m as well as our 60-cm domes from the inside. However, we will not be able to open the domes under rain and/or overcast conditions.&nbsp; The location is &#39;York University Petrie Science and Engineering&#39; building and is given in the event. To enter the observatory go to the Petrie Science and Engineering building and go up to the 3rd floor. You will then just follow the signs for the &#39;Observatory&#39; and your tour guide will meet you at the main door. Please keep in mind only one ticket booking per person is currently allowed.&nbsp; For more events: Our regular online public viewing will continue every Monday evening from 9-10pm ET, with audio from York Universe podcast and broadcasting at: &nbsp;<a fr-original-style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;" href="https://www.youtube.com/user/YorkUObservatory/live" style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;">https://www.youtube.com/user/YorkUObservatory/live</a> On the final Friday of every month, we will be broadcasting live astronomy episodes on YouTube from 7:30pm ET on our TeleTube broadcast at: <a fr-original-style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;" href="https://www.youtube.com/user/YorkUObservatory/live" style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;">https://www.youtube.com/user/YorkUObservatory/live</a> For weather updates and all information see our website&nbsp;at <a fr-original-style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;" href="https://www.yorku.ca/science/observatory/" style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;">https://www.yorku.ca/science/observatory/</a>You can also email us at observe@yorku.ca! Happy viewing, hope to see you all either online or at one of our in person events.<img src="https://res.cloudinary.com/hxn9dbuhd/image/upload/v1696275419/ljxnj6l24et7sdz3hvqm.png" style="width: 600px; display: block; vertical-align: top; margin: 5px auto; text-align: center; position: relative; max-width: 100%; cursor: pointer; padding: 0px 1px; user-select: none; box-sizing: inherit;" fr-original-style="width: 600px; display: block; vertical-align: top; margin: 5px auto; text-align: center; position: relative; max-width: 100%; cursor: pointer; padding: 0px 1px; user-select: none; box-sizing: inherit;" fr-original-class="fr-draggable">

Allan I. Carswell Observatory Tour, September 9th 2026

Allan I. Carswell Observatory Tour, August 12th 2026

Welcome to the York University Pop-Up Event! This week the Allan I Carswell Observatory is running our outdoor&nbsp;Pop-Up Event. Events are all-ages. These sessions will only go ahead if the weather is CLEAR. Masks are recommended. Location and Details:The location is the &#39;York University Subway Station&#39; just adjacent from the York Lanes Building at York University. To find us, look for a small crowd with a telescope. Please keep in mind only one ticket booking per person is currently allowed. We do not have in-person tickets.&nbsp; For more events:&nbsp;We will be hosting our free in-person tours every Wednesday (except some holidays). For more info, please visit our website: <a fr-original-style="" href="https://www.yorku.ca/science/observatory/" style="text-decoration-color: currentcolor; user-select: auto; box-sizing: inherit;" target="_blank">https://www.yorku.ca/science/observatory/</a> Our online events include, our regular online public viewing (OPV) every Monday evening from 9-10pm ET, (with audio from the York Universe) and; our Teletube broadcast on the last Friday of every month from 7:30pm ET on: <a fr-original-style="" href="https://www.youtube.com/user/YorkUObservatory/live" style="text-decoration-color: currentcolor; user-select: auto; box-sizing: inherit;" target="_blank">https://www.youtube.com/user/YorkUObservatory/live</a>&nbsp; For weather updates and all information see our website at <a fr-original-style="" href="https://www.yorku.ca/science/observatory/" style="text-decoration-color: currentcolor; user-select: auto; box-sizing: inherit;" target="_blank">https://www.yorku.ca/science/observatory/</a>&nbsp; Extra Help:You can also email us at observe@yorku.ca! Happy viewing, hope to see you all either online or at one of our in person events.

Allan I. Carswell Pop-Up Event, August 5th 2026

Allan I. Carswell Pop-Up Event, July 29th 2026

Allan I. Carswell Observatory Tour, July 22nd 2026

Welcome to the York University Pop-Up Event! This week the Allan I Carswell Observatory is running our outdoor&nbsp;Pop-Up Event. Events are all-ages. These sessions will only go ahead if the weather is CLEAR. Masks are recommended.The location is the &#39;York University Subway Station&#39; just adjacent from the York Lanes Building at York University. To find us, look for a small crowd with a telescope. Please keep in mind only one ticket booking per person is currently allowed. We do not have in-person tickets.&nbsp; For more events: We will be hosting our free in-person tours every Wednesday (except some holidays). For more info, please visit our website: <a fr-original-style="" href="https://www.yorku.ca/science/observatory/" style="text-decoration-color: currentcolor; user-select: auto; box-sizing: inherit;" target="_blank">https://www.yorku.ca/science/observatory/</a> Our online events include, our regular online public viewing (OPV) every Monday evening from 9-10pm ET, (with audio from the York Universe) and; our Teletube broadcast on the last Friday of every month from 7:30pm ET on: <a fr-original-style="" href="https://www.youtube.com/user/YorkUObservatory/live" style="text-decoration-color: currentcolor; user-select: auto; box-sizing: inherit;" target="_blank">https://www.youtube.com/user/YorkUObservatory/live</a>&nbsp; For weather updates and all information see our website at <a fr-original-style="" href="https://www.yorku.ca/science/observatory/" style="text-decoration-color: currentcolor; user-select: auto; box-sizing: inherit;" target="_blank">https://www.yorku.ca/science/observatory/</a>&nbsp; Extra Help:You can also email us at observe@yorku.ca! Happy viewing, hope to see you all either online or at one of our in person events.

Allan I. Carswell Pop-Up Event, July 15th 2026

Allan I. Carswell Observatory Tour, July 8th 2026

Allan I. Carswell Observatory Tour, June 24th 2026

Welcome to the York University Allan I Carswell Astronomical Observatory!We are running regular in person shows every Wednesday. These sessions will go ahead regardless of weather conditions. &nbsp;Guests will be shown into the 1-m as well as our 60-cm domes from the inside. However, we will not be able to open the domes under rain and/or overcast conditions.&nbsp; The location is &#39;York University Petrie Science and Engineering&#39; building and is given in the event. To enter the observatory go to the Petrie Science and Engineering building and go up to the 3rd floor. You will then just follow the signs for the &#39;Observatory&#39; and your tour guide will meet you at the main door. Please keep in mind only one ticket booking per person is currently allowed.&nbsp; Our regular online public viewing will continue every Monday evening from 9-10pm ET, with audio from York Universe podcast and broadcasting at: &nbsp;<a fr-original-style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;" href="https://www.youtube.com/user/YorkUObservatory/live" style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;">https://www.youtube.com/user/YorkUObservatory/live</a> On the final Friday of every month, we will be broadcasting live astronomy episodes on YouTube from 7:30pm ET on our TeleTube broadcast at: <a fr-original-style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;" href="https://www.youtube.com/user/YorkUObservatory/live" style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;">https://www.youtube.com/user/YorkUObservatory/live</a> For weather updates and all information see our website&nbsp;at <a fr-original-style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;" href="https://www.yorku.ca/science/observatory/" style="text-decoration-color:initial;user-select:auto;box-sizing:inherit;">https://www.yorku.ca/science/observatory/</a>You can also email us at observe@yorku.ca! Happy viewing, hope to see you all either online or at one of our in person events.<img src="https://res.cloudinary.com/hxn9dbuhd/image/upload/v1696275419/ljxnj6l24et7sdz3hvqm.png" style="width: 600px; display: block; vertical-align: top; margin: 5px auto; text-align: center; position: relative; max-width: 100%; cursor: pointer; padding: 0px 1px; user-select: none; box-sizing: inherit;" fr-original-style="width: 600px; display: block; vertical-align: top; margin: 5px auto; text-align: center; position: relative; max-width: 100%; cursor: pointer; padding: 0px 1px; user-select: none; box-sizing: inherit;" fr-original-class="fr-draggable">

Allan I. Carswell Observatory Tour, June 17th 2026

Allan I. Carswell Observatory Tour, June 10th 2026 

Allan I. Carswell Observatory Tour, May 27th 2026

Allan I. Carswell Observatory Tour, May 13th 2026

Welcome to the York University Allan I Carswell Astronomical Observatory!We are running regular in person shows. Events are all-ages. These sessions will only go ahead if the weather is CLEAR.  Masks are recommended. The location is the 'Arboretum Lane Parking Garage' just across from the 'York University Petrie Science and Engineering' building at York University. To enter the observatory atrium go to the top level of the parking garage and look for the wire enclosure with the telescopes. Please keep in mind only one ticket booking per person is currently allowed. We do not have in-person tickets. We will be hosting our free in-person tours every Wednesday (except some holidays). For more info, please visit our website: <a href="https://www.yorku.ca/science/observatory/" style="text-decoration-color:initial;user-select:auto;box-sizing:inherit">https://www.yorku.ca/science/observatory/</a> Our regular online public viewing will continue every Monday evening from 9-10pm ET, with audio from York Universe podcast and broadcasting at:  <a href="https://www.youtube.com/user/YorkUObservatory/live" style="text-decoration-color:initial;user-select:auto;box-sizing:inherit">https://www.youtube.com/user/YorkUObservatory/live</a> On the last Friday of each month, we will be broadcasting live astronomy episodes on YouTube from 7:30pm ET on our Final Friday TeleTube broadcast at: <a href="https://www.youtube.com/user/YorkUObservatory/live" style="text-decoration-color:initial;user-select:auto;box-sizing:inherit">https://www.youtube.com/user/YorkUObservatory/live</a> For weather updates and all information see our website at https://www.yorku.ca/science/observatory/ You can also email us at observe@yorku.ca! Happy viewing, hope to see you all either online or at one of our in person events.

Allan I. Carswell Observatory Tour, May 6th 2026

Allan I. Carswell Arboretum In person event, April 22nd 2026

Welcome to the York University Allan I Carswell Astronomical Observatory!We are running regular in person shows. Events are all-ages. These sessions will only go ahead if the weather is CLEAR. &nbsp;Masks are recommended.&nbsp;The location is the &#39;Arboretum Lane Parking Garage&#39; just across&nbsp;from the &#39;York University Petrie Science and Engineering&#39; building at York University. To enter the observatory atrium go to the top level of the parking garage and look for the wire enclosure with the telescopes. Please keep in mind only one ticket booking per person is currently allowed. We do not have in-person tickets.&nbsp;We will be hosting our free in-person tours every Wednesday (except some holidays). For more info, please visit our website: <a fr-original-style="" href="https://www.yorku.ca/science/observatory/" rel="noopener noreferrer" style="text-decoration-color: initial; user-select: auto; box-sizing: inherit;" target="_blank">https://www.yorku.ca/science/observatory/</a> Our regular online public viewing will continue every Monday evening from 9-10pm ET, with audio from York Universe podcast and broadcasting at: &nbsp;https://www.youtube.com/user/YorkUObservatory/live On the last Friday of each month, we will be broadcasting live astronomy episodes on YouTube from 7:30pm ET on our Final Friday TeleTube broadcast at: https://www.youtube.com/user/YorkUObservatory/live For weather updates and all information see our website at https://www.yorku.ca/science/observatory/&nbsp;You can also email us at observe@yorku.ca! Happy viewing, hope to see you all either online or at one of our in person events.

Allan I Carswell Observatory

Allan I Carswell Observatory

Upcoming events

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Allan I. Carswell Observatory, Tour, November 18th 2026

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Upcoming events

Events

Get your tickets

Allan I. Carswell Observatory, Tour, November 18th 2026

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Allan I Carswell Observatory