Astronomy and Earth Day

Astronomy and Earth Day - April 12, 2026

Enjoy a full day of FREE family-friendly activities exploring sustainability on Earth and in space!

Presented by Fiske Planetarium, Sommers-Bausch Observatory, and CU's Department of Astrophysical and Planetary Sciences.

Join us for free sustainability focused fulldome shows, previews of new Fiske productions on current science initiatives, and engage with interactive STEM exhibits. Plus, enjoy free telescope demonstrations (daytime) and observing (nighttime), color with ultraviolet light in the observatory's library, and engage with more interactive STEM exhibits. And, meet current and former APS students, talk with current staff and professors, and learn what your future could look like at Âé¶¹ÊÓÆµ.

Activity Map

Fiske Theater schedule
12:05pm – Climate Change in Our BackyardÌý
12:45pm – Global SoundscapesÌý
1:45pm – We Are StarsÌý
2:30pm – Stars and Planets: A Comparison of Habitability (en Inglés y en Español)Ìý
3:45pm – We Are Stars (en Español)Ìý
4:25pm – Habitat Earth with Frances McDormand 12:00-5:00PM Ìý

STEM activities from 12-5pm at Fiske Planetarium & Sommers-Bausch Observatory

Fiske LobbySommers-Bausch ObservatoryFiske ClassroomFiske Lawn
Illuminate the effects of light pollution with DarkSky ColoradoExplore the UV Coloring RoomExperience your senses in space with Open OrbitSee the Sun with Fiske and NOAA through several solar telescopes (weather permitting)
Create your own spacecraft with LASPPlay with Light & ShadowsTransform your own terrain on Mars and the Moon with CosmosphereUncover the excitement to come with CU's 150th Anniversary celebrations
Walk in the shoes of astronauts on the ISS with Cosmosphere20" Telescope ViewingÌýÌý
Observe ozone science and bask in bathymetry with NOAA and CIRES24" Telescope ToursÌýÌý
Journey to our welcome table to join an out-of-this-world raffleSpace Bingo with Prizes!ÌýÌý
Shop for stellar items in our gift storeÌýÌýÌý

7:00-8:00PM ÌýKeynote presentation with Dr. Warren Sconiers at Fiske sponsored by The SPIKE Center for Sustainability Education
The SPIKE Center is focused on students and their success by integrating sustainability education and curriculum across campus. The SPIKE Center will enable students and faculty to become tomorrow’s sustainability leaders and enhance the positive environmental change we see in our community.

8:00-10:00PM Telescope viewing at Sommers-Bausch Observatory

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Daytime activities will be provided by the following partners.

Cosmosphere logo

- Plant Moon and Mars terrariums to demonstrate the sustainability of growing food on other worlds. Experience life on a self-sustaining space station. Efficient recycling technologies, sustainable energy sources and power generation, and innovations for extraterrestrial agriculture.

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CU Space minor logo

CU Space Minor - Play space minor bingo, win spaced-themed prizes, learn about the Space Minor at Âé¶¹ÊÓÆµ. Arts and Humanities of Space; Earth, space and universe education; and technological, political and social impacts of space flight.

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Dark Sky Colorado logo

- Learn how to mitigate light pollution, experience the benefit of seeing the stars at night, and speak to leading community experts. Reduce energy and money waste while supporting health, limit artificial outdoor lighting, and improve visibility of night sky and habitability of ecosytems.

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LASP logo

- Build your own spacecraft, learn about the work LASP is doing today, and talk with real scientists and engineers. Reduce space instruments using less fuel, reuse secondary missions for expended satellites, and recycle leading space missions for recycling resources in space.

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NOAA logo
CIRES logo

& - Visualize real scientific satellite data in three dimensions, learn about our ozone layer and ozonesondes, talk with real scientist and learn about the work they do. National weather service aides in decision making and lifesaving, provide data and information about our changing climate, and use satellite data to better understand our dynamic earth. Weather, climate, and atmospheric research; energy and resource management and sustainability; and biology, ecosystems and ocean science.

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Open orbit logo

- Experience the five senses like never before, meet real science communicators and learn about their podcast, learn about what space may be like from here on Earth. Science communication engagement and support, student led science content, and build meaningful connections that have lasting impacts.

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