Committee for the Protection of Astronomy and the Space Environment (COMPASSE)

AAS 247th Meeting
2026-01-04 - 2026-01-08 | Phoenix Convention Center, 100 North Third Street, Phoenix, AZ, 85004, United States
The 247th AAS meeting (joint with the Historical Astronomy Division) will be held 4-8 January in Phoenix, Arizona at the Phoenix Convention Center.

UN/SKAO Workshop on Dark and Quiet Skies for Science and Society 2025
2025-12-09 - 2025-12-11 | Vienna International Centre, Wagramerstrasse 5, Vienna, Wien, A-1220, Austria
This joint workshop will provide an overview of activities carried out by astronomers and satellite operators as well as manufacturers to minimise the impact of satellites on the astronomical sciences. The discussion will encompass both mitigation measures against the effect of low-earth orbiting satellites crossing the field of view of optical telescopes as well as potential radio-frequency interference with radio astronomy observations. The workshop will also aim to identify and encourage the advancements in prediction and measurements resources, and additional mitigation tools. In addition, the legal and regulatory aspects of keeping skies dark and quiet will be explored.

9th International Conference on Artificial Light at Night
2025-10-28 - 2025-10-30 | Westport, Ireland, Ireland

IAU Symposium 399/Oxford XIII: Indigenous Astronomy in the Space Age
2025-07-07 - 2025-07-11 | AZ
This IAU Symposium will bring together astrophysicists, social scientists, and Indigenous Elders to explore the future of astrophysics in the Space Age by drawing from important lessons about the intersection of astronomy, culture, and society over the last 30 years. The symposium will engage with the latest scholarship in Indigenous/Cultural Astronomy to address social issues within astrophysics and examine the cross-cultural relationships between astrophysics communities and Indigenous communities around the world. The IAU proceedings will explore new research methodologies and emerging theoretical frameworks, scrutinise pathways to decolonise astronomy, and discuss ways Indigenous knowledge can guide modern astrophysics. UniMelb is a leading global institution for Indigenous community engagement through the Indigenous Knowledge Institute and the world’s only undergraduate programme in cultural astronomy. July is ideal as it is between semesters at most institutions worldwide, enabling the maximum number of participants to attend and participate in a wide range of important scientific and cultural activities available in one of the most cosmopolitan cities in the world.

AAS 246th Meeting
2025-06-08 - 2025-06-12 | Dena’ina Civic & Convention Center, 600 W. Seventh Avenue, Anchorage, AK, 99501, United States

AAS 245th Meeting
2025-01-12 - 2025-01-16 | Gaylord National Resort & Convention Center, 201 Waterfront Street, National Harbor, MD, 20745, United States

Under One Sky conference
2024-11-08 - 2024-11-09 | AZ
Join us November 8-9 as we unite to protect the night at Under One Sky 2024, a 24-hour virtual event designed to inspire and strengthen the growing dark sky movement and reduce light pollution worldwide.

XXXII IAU General Assembly
2024-08-06 - 2024-08-15 | Cape Town International Convention Centre, 1 Lower Long Street, Cape Town, 8001, South Africa

Light Pollution: Theory, Modelling and Measurements 2024
2024-07-09 - 2024-07-12 | Agrarbildungszentrum Salzkammergut, Pichlhofstrasse 62, Altmuenster, 4813, Austria

AAS 244 Meeting
2024-06-09 - 2024-06-13 | Monona Terrace Community & Convention Center, 1 John Nolen Dr, Madison, WI, 53703, United States
Join us 9-13 June in Madison, Wisconsin, at the Monona Terrace Convention Center for the 244th AAS meeting

Some Event 3
2024-03-14 08:00 - 17:00 UTC | AZ
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Event 5
2024-02-07 08:00 - 17:00 | AZ
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Some New Event
2024-02-06 00:00 | AZ

DeadLine
2024-02-01 16:00 - 17:00 | AZ
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