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Join us this Wednesday, July 9, for an exciting evening of astronomy at the Allan I. Carswell Observatory! We are hosting an observatory tour where guests will have a chance to explore the inside of our incredible 1m and 60cm telescope domes.
Bonus: If the skies are clear, we’ll set up our 1m telescope for live observing!
Date: Wednesday, July 9, 2025
Time: 9:00 – 11:00 PM ET
Location: Petrie Science and Engineering Building, 3rd Floor
Get your free tickets here: https://www.zeffy.com/ticketing/allan-i-carswell-arboretum-in-person-event-july-9th--2025

#Astronomy #Astronomer #Space #YorkU #Observatory #AllanICarswellObservatory #Stargazing #Telescope #Planets #Stars #Science #Physics #Toronto #YorkUObservatory #ClearSkies #Tour #FreeEvents #FamilyFriendly #ScienceOutreach #Tour #AICO
Allan I. Carswell Observatory is hosting an in-person sky-observing tour! The event will be on the Arboretum Lane Parking Garage just across from the York University Petrie Science and Engineering Building at 9:00 PM on July 2, 2025
Date: Wednesday, July 2, 2025
Time: 9:00 – 11:00 PM ET
Location: Arboretum Lane Parking
Get your free tickets here: https://www.zeffy.com/en-CA/ticketing/allan-i-carswell-arboretum-in-person-event-july-2nd--2025
Tickets are free but required and the tour is weather dependent so please ensure that the event is still running the day of the event by checking our socials or website at yorku.ca/science/observatory

#Astronomy #Astronomer #Space #YorkU #Observatory #AllanICarswellObservatory #Stargazing #Telescope #Planets #Stars #Science #Physics #Toronto #YorkUObservatory #ClearSkies #FreeEvents #FamilyFriendly #ScienceOutreach #Tour #AICO
Thanks to everyone who followed along with us, we had the first clear day on Sunday June 29th, 5-11pm
The Open Air Astro Fair event Is Done!!! A huge thanks to everyone who joined us for astronomy activities. All funds raised will go to observatory repairs and summer operations.
A photo and video gallery for the event will be posted to the observatory website in the next week. As a reminder if any of you would like to revisit the observatory we will have smaller Wednesday tour events for free all year long after sunset at the observatory (free tickets can be found on the website). https://www.yorku.ca/science/observatory/
Thank you all for your support!

#AstroFair #AstronomyEvent #FamilyFun #ScienceFestival #YorkU #AllanICarswellObservatory #Stargazing #SolarViewing #Sunspots #Planetarium #HandsOnScience #ScienceOutreach #STEMEducation #TorontoEvents #ThingsToDoToronto #SpaceScience #AstronomyForEveryone #ObservatoryEvents #ClearSkies #TelescopeViews #ExploreTheUniverse #AstronomerLife #YorkUObservatory #AICO
Unfortunately, Astro Fair is NOT running tonight due to weather conditions. We’ll keep watching the skies and announce the next clear night soon. Your ticket is still valid, and you’ll receive another update by 9:00 AM tomorrow.
Stay tuned! Currently the best day looks to be Sunday June 29th
https://www.yorku.ca/science/observatory/astrofair/

#AstroFair #AstronomyEvent #FamilyFun #ScienceFestival #YorkU #AllanICarswellObservatory #Stargazing #SolarViewing #Sunspots #Planetarium #HandsOnScience #ScienceOutreach #STEMEducation #TorontoEvents #ThingsToDoToronto #SpaceScience #AstronomyForEveryone #ObservatoryEvents #ClearSkies #TelescopeViews #ExploreTheUniverse #AstronomerLife #YorkUObservatory #AICO
Unfortunately, Astro Fair is NOT running tonight due to weather conditions. We’ll keep watching the skies and announce the next clear night soon. Your ticket is still valid, and you’ll receive another update by 9:00 AM tomorrow.
Stay tuned! Currently the best day looks to be Sunday June 29th
https://www.yorku.ca/science/observatory/astrofair/

#AstroFair #AstronomyEvent #FamilyFun #ScienceFestival #YorkU #AllanICarswellObservatory #Stargazing #SolarViewing #Sunspots #Planetarium #HandsOnScience #ScienceOutreach #STEMEducation #TorontoEvents #ThingsToDoToronto #SpaceScience #AstronomyForEveryone #ObservatoryEvents #ClearSkies #TelescopeViews #ExploreTheUniverse #AstronomerLife #YorkUObservatory #AICO
Unfortunately, Astro Fair is NOT running tonight due to weather conditions. We’ll keep watching the skies and announce the next clear night soon. Your ticket is still valid, and you’ll receive another update by 9:00 AM tomorrow.
Stay tuned! Currently the best days look to be Saturday June 28th and Sunday June 29th
https://www.yorku.ca/science/observatory/astrofair/

#AstroFair #AstronomyEvent #FamilyFun #ScienceFestival #YorkU #AllanICarswellObservatory #Stargazing #SolarViewing #Sunspots #Planetarium #HandsOnScience #ScienceOutreach #STEMEducation #TorontoEvents #ThingsToDoToronto #SpaceScience #AstronomyForEveryone #ObservatoryEvents #ClearSkies #TelescopeViews #ExploreTheUniverse #AstronomerLife #YorkUObservatory #AICO
Who doesn't love space? It captures our imaginations and makes us wonder if we are truly alone.
Join us for a fair of astronomical proportions at York University with the Allan I Carswell Observatory and our event partners. A single ticket will get you entry to booths, activities, telescopes, and the Astronomy in Action Planetarium.
This exciting event is running as a FIRST CLEAR DAY event as it will be outdoors and under the open air between June 24 - July 4. The event will happen only once on the first clear day, and all ticket holders will see a go or no-go update (depending on the weather) both on the event website and via their registration email by 9am each day.
We are excited to welcome you to walk through the solar system, investigate sundials, and interact with both science and games in this event. All areas are suitable for ages 5 and up, but younger children should be accompanied by an adult.
For tickets and information see: https://www.yorku.ca/science/observatory/astrofair/

Curious about what makes Astro Fair so special? Check out our spotlight in YFile!
https://www.yorku.ca/yfile/2025/06/18/open-air-astro-fair-fosters-learning-local-support-for-york-u-observatory/

#AstroFair #AstronomyEvent #FamilyFun #ScienceFestival #YorkU #AllanICarswellObservatory #Stargazing #SolarViewing #Sunspots #Planetarium #HandsOnScience #ScienceOutreach #STEMEducation #TorontoEvents #ThingsToDoToronto #SpaceScience #AstronomyForEveryone #ObservatoryEvents #ClearSkies #TelescopeViews #ExploreTheUniverse #AstronomerLife #YorkUObservatory #AICO
Who doesn't love space? It captures our imaginations and makes us wonder if we are truly alone.
Join us for a fair of astronomical proportions at York University with the Allan I Carswell Observatory and our event partners. A single ticket will get you entry to booths, activities, telescopes, and the Astronomy in Action Planetarium.
This exciting event is running as a FIRST CLEAR DAY event as it will be outdoors and under the open air between June 24 - July 4. The event will happen only once on the first clear day, and all ticket holders will see a go or no-go update (depending on the weather) both on the event website and via their registration email by 9am each day.
We are excited to welcome you to walk through the solar system, investigate sundials, and interact with both science and games in this event. All areas are suitable for ages 5 and up, but younger children should be accompanied by an adult.
For tickets and information see: https://www.yorku.ca/science/observatory/astrofair/

Curious about what makes Astro Fair so special? Check out our spotlight in YFile!
https://www.yorku.ca/yfile/2025/06/18/open-air-astro-fair-fosters-learning-local-support-for-york-u-observatory/

#AstroFair #AstronomyEvent #FamilyFun #ScienceFestival #YorkU #AllanICarswellObservatory #Stargazing #SolarViewing #Sunspots #Planetarium #HandsOnScience #ScienceOutreach #STEMEducation #TorontoEvents #ThingsToDoToronto #SpaceScience #AstronomyForEveryone #ObservatoryEvents #ClearSkies #TelescopeViews #ExploreTheUniverse #AstronomerLife #YorkUObservatory #AICO

Hi Mastodon! 👋
New instance, new #introduction 😄
We have just left astrodon.social, which is closing down, to find a new home at scicomm.xyz. Thanks!

We are the OST (Overwhelmingly Small Telescope) Observatory at the University of Potsdam in Golm, on the outskirts of Potsdam, Germany.

Our main telescope is a PlaneWave CDK20 Astrograph. We focus on educating students in astronomy and supporting both undergraduate and postgraduate projects. We occasionally capture and share astronomical images, and we are excited to post some of them here.

We are also passionate about science outreach and regularly participate in public events such as the Potsdam Day of Science and the Long Night of Astronomy.

Follow us for updates in both English and German!

Join us this Wednesday, June 18, for an exciting evening of astronomy at the Allan I. Carswell Observatory! We are hosting an observatory tour where guests will have a chance to explore the inside of our incredible 1m and 60cm telescope domes.
Bonus: If the skies are clear, we’ll set up our 1m telescope for live observing!
Date: Wednesday, June 18, 2025
Time: 9:00 – 11:00 PM ET
Location: Petrie Science and Engineering Building, 3rd Floor
Get your free tickets here: https://www.zeffy.com/en-CA/ticketing/allan-i-carswell-observatory-tour-june-18th--2025

#Astronomy #Astronomer #Space #YorkU #Observatory #AllanICarswellObservatory #Stargazing #Telescope #Planets #Stars #Science #Physics #Toronto #YorkUObservatory #ClearSkies #Tour #FreeEvents #FamilyFriendly #ScienceOutreach #Tour #AICO
Who doesn't love space? It captures our imaginations and makes us wonder if we are truly alone.
Join us for a fair of astronomical proportions at York University with the Allan I Carswell Observatory and our event partners. A single ticket will get you entry to booths, activities, telescopes, and the Astronomy in Action Planetarium.
This exciting event is running as a FIRST CLEAR DAY event as it will be outdoors and under the open air between June 24 - July 4. The event will happen only once on the first clear day, and all ticket holders will see a go or no-go update (depending on the weather) both on the event website and via their registration email by 9am each day.
We are excited to welcome you to walk through the solar system, investigate sundials, and interact with both science and games in this event. All areas are suitable for ages 5 and up, but younger children should be accompanied by an adult.
For tickets and information see: https://www.yorku.ca/science/observatory/astrofair/

#AstroFair #AstronomyEvent #FamilyFun #ScienceFestival #YorkU #AllanICarswellObservatory #Stargazing #SolarViewing #Sunspots #Planetarium #HandsOnScience #ScienceOutreach #STEMEducation #TorontoEvents #ThingsToDoToronto #SpaceScience #AstronomyForEveryone #ObservatoryEvents #ClearSkies #TelescopeViews #ExploreTheUniverse #AstronomerLife #YorkUObservatory #AICO
Have you ever wanted to watch sunspots go across the sun in real time? Or build your own astronomically accurate fortune teller? Join in as we celebrate astronomy at the AICO and beyond! This special observatory fundraiser event will be fun for the whole family and features science, astronomy viewing, and activities!
For more information visit: https://www.yorku.ca/science/observatory/astrofair/

🗓️ Event Date
Runs on the first clear night between June 24 – July 4, 2025
(Weather-dependent: Check your email and this website on the day of the event for final confirmation — we need clear skies!)
🕔 Time
From 5:00 PM – 11:00 PM
📍 Location
Activities will take place both indoors and outdoors
at the Atrium and Observatory areas (York University Keele Campus)
🎟️ Ticket Info
Includes unlimited access to all activities, booths, and planetarium shows
Valid for both Atrium and Observatory locations
Non-refundable — proceeds support summer observatory operations
🚗 Getting There
Parking available on campus (paid).
One parking slot per group may be covered by AICO
Arrive easily by TTC subway:
York University Station (closest to the Observatory)
Pioneer Village Station (also within walking distance)

#AstroFair #AstronomyEvent #FamilyFun #ScienceFestival #YorkU #AllanICarswellObservatory #Stargazing #SolarViewing #Sunspots #Planetarium #HandsOnScience #ScienceOutreach #STEMEducation #TorontoEvents #ThingsToDoToronto #SpaceScience #AstronomyForEveryone #ObservatoryEvents #ClearSkies #TelescopeViews #ExploreTheUniverse #AstronomerLife #YorkUObservatory #AICO
Allan I. Carswell Observatory is hosting an in-person sky-observing tour! The event will be on the Arboretum Lane Parking Garage just across from the York University Petrie Science and Engineering Building at 9:00 PM on June 11, 2025
Date: Wednesday, June 11, 2025
Time: 9:00 – 11:00 PM ET
Location: Arboretum Lane Parking
Get your free tickets here: https://www.zeffy.com/en-CA/ticketing/allan-i-carswell-arboretum-in-person-event-june-11th--2025 atri
Tickets are free but required, and the tour is weather dependent so please ensure that the event is still running the day of by checking our socials or website at https://yorku.ca/science/observatory

#Astronomy #Astronomer #Space #YorkU #Observatory #AllanICarswellObservatory #Stargazing #Telescope #Planets #Stars #Science #Physics #Toronto #YorkUObservatory #ClearSkies #FreeEvents #FamilyFriendly #ScienceOutreach #Tour #AICO
Have you ever wanted to watch sunspots go across the sun in real time? Or build your own astronomically accurate fortune teller? Join in as we celebrate astronomy at the AICO and beyond! This special observatory fundraiser event will be fun for the whole family and features science, astronomy viewing, and activities!
For more information visit: https://www.yorku.ca/science/observatory/astrofair/

🗓️ Event Date
Runs on the first clear night between June 24 – July 4, 2025
(Weather-dependent: Check your email and this website on the day of the event for final confirmation — we need clear skies!)
🕔 Time
From 5:00 PM – 11:00 PM
📍 Location
Activities will take place both indoors and outdoors
at the Atrium and Observatory areas (York University Keele Campus)
🎟️ Ticket Info
Includes unlimited access to all activities, booths, and planetarium shows
Valid for both Atrium and Observatory locations
Non-refundable — proceeds support summer observatory operations
🚗 Getting There
Parking available on campus (paid).
One parking slot per group may be covered by AICO
Arrive easily by TTC subway:
York University Station (closest to the Observatory)
Pioneer Village Station (also within walking distance)

#AstroFair #AstronomyEvent #FamilyFun #ScienceFestival #YorkU #AllanICarswellObservatory #Stargazing #SolarViewing #Sunspots #Planetarium #HandsOnScience #ScienceOutreach #STEMEducation #TorontoEvents #ThingsToDoToronto #SpaceScience #AstronomyForEveryone #ObservatoryEvents #ClearSkies #TelescopeViews #ExploreTheUniverse #AstronomerLife #YorkUObservatory #AICO

Hi Mastodon! 👋
We are the OST (Overwhelmingly Small Telescope) Observatory at the University of Potsdam in Golm, on the outskirts of Potsdam, Germany.

Our main telescope is a PlaneWave CDK20 Astrograph. We focus on educating students in astronomy and supporting both undergraduate and postgraduate projects. We occasionally capture and share astronomical images, and we are excited to post some of them here.

We are also passionate about science outreach and regularly participate in public events such as the Potsdam Day of Science and the Long Night of Astronomy.

Follow us for updates in both English and German!

Allan I. Carswell Observatory is hosting an in-person sky-observing tour! The event will be on the Arboretum Lane Parking Garage just across from the York University Petrie Science and Engineering Building at 9:00 PM on June 4, 2025
Date: Wednesday, June 4, 2025
Time: 9:00 – 11:00 PM ET
Location: Arboretum Lane Parking
Get your free tickets here: https://www.zeffy.com/en-CA/ticketing/allan-i-carswell-arboretum-in-person-event-june-4th--2025
Tickets are free but required, and the tour is weather dependent so please ensure that the event is still running the day of by checking our socials or website at https://yorku.ca/science/observatory

#Astronomy #Astronomer #Space #YorkU #Observatory #AllanICarswellObservatory #Stargazing #Telescope #Planets #Stars #Science #Physics #Toronto #YorkUObservatory #ClearSkies #FreeEvents #FamilyFriendly #ScienceOutreach #Tour #AICO