Education
To learn more about tidal features and galaxy mergers:
https://science.nasa.gov/gallery/hubble-images-of-galaxies-with-tidal-tails/
A Hubble image gallery of colliding galaxies with long tidal tails, with short explanations of how gravity stretches galaxies and pulls out streams of stars and gas.
https://science.nasa.gov/missions/hubble/tadpoles-tidal-tail/
A focused Hubble feature on the Tadpole Galaxy, explaining how its spectacular tail formed during a close gravitational encounter.
https://esahubble.org/news/heic2101/
“When Galaxies Collide”: an ESA/Hubble press release and image montage showing six different galaxy mergers, with a clear description of why interactions are key to galaxy evolution.
https://www.cfa.harvard.edu/research/topic/galaxies-merging-and-interacting
A short overview from the Center for Astrophysics on merging and interacting galaxies, why they’re common, and what they teach us about how galaxies grow.
To learn more about galaxies and galaxy evolution:
https://science.nasa.gov/universe/galaxies/
“Galaxy Basics” from NASA Science, introducing what galaxies are, different galaxy types, and how we observe them.
https://science.nasa.gov/universe/galaxies/evolution/
NASA’s galaxy evolution page, with sections on formation, collisions, mergers, and “galactic cannibalism,” and how all of these shape galaxies over time.
https://science.nasa.gov/mission/webb/galaxies-over-time/
A Webb mission explainer on how astronomers use telescopes to study galaxies across cosmic time, including examples of interacting systems.
https://science.nasa.gov/mission/webb/science-overview/science-explainers/webb-science-galaxies-through-time/
A video+article explainer on “galaxies through time,” describing how Webb helps fill in the missing pages of the universe’s history and what that means for galaxy evolution.
To learn more about the Euclid mission and deep imaging:
https://www.esa.int/Science_Exploration/Space_Science/Euclid
ESA’s main Euclid mission page, explaining the goals of mapping billions of galaxies, dark matter, and dark energy over a large fraction of the sky.
https://sci.esa.int/web/euclid
ESA’s Euclid science and technology page, with more detail on how Euclid measures galaxy shapes and distances to map the large-scale structure of the universe.
https://euclid.caltech.edu/
NASA/Caltech’s Euclid site, with a concise mission overview, survey description, and links to further materials about how Euclid studies dark energy and dark matter.
https://www.nasa.gov/missions/euclid/esa-previews-euclid-missions-deep-view-of-dark-universe/
A NASA/ESA article using early Euclid data to explain what the mission will reveal about the “dark universe” and why its deep, sharp images of galaxies are scientifically powerful.
To learn more about Galaxy Zoo’s work with Euclid:
https://www.esa.int/Science_Exploration/Space_Science/Euclid/Euclid_opens_data_treasure_trove_offers_glimpse_of_deep_fields
An ESA article introducing Euclid’s first data release, with early images from the deep fields and a discussion of how citizen science (including Galaxy Zoo) will help analyze these enormous datasets.
https://blog.galaxyzoo.org/2025/03/19/galaxy-zoo-featured-in-first-euclid-data-release/
A Galaxy Zoo blog post describing how volunteers contributed to the first Euclid data release.
https://www.esa.int/Science_Exploration/Space_Science/Euclid/Euclid_Galaxy_Zoo_help_us_classify_the_shapes_of_galaxies
ESA’s announcement about the Euclid × Galaxy Zoo collaboration, explaining how volunteer classifications support Euclid’s science goals and why human pattern recognition is essential.
To learn more about Galaxy Zoo:
https://science.nasa.gov/citizen-science/galaxy-zoo/
NASA’s Galaxy Zoo citizen science page, explaining how classifying galaxy shapes helps scientists study galaxy evolution and interactions.
https://galaxyzoo.org
The main Galaxy Zoo project page on Zooniverse, with background on the project, examples of galaxy images, and links to related materials.
https://blog.galaxyzoo.org
Galaxy Zoo blog, featuring behind-the-scenes stories, results, and explanations of how volunteer work connects to research.
To explore astronomy learning resources more broadly:
https://science.nasa.gov/universe/fun-exploring-the-universe/
NASA’s “Fun Exploring the Universe” page, which links to NASA’s Universe of Learning — a collection of videos, activities, and data experiences for learners and educators, many focused on galaxies and cosmology.
https://universe-of-learning.org
NASA’s Universe of Learning homepage, with curated astronomy education content, visualizations, and classroom-ready resources based on real mission data.