Hidden Oceans of Icy Moons: Europa to Enceladus
Explore subsurface oceans on Europa, Enceladus, Titan, and Ganymede. Learn how we detect hidden seas, their chemistry, energy sources, and upcoming missions.

Guides to help with your Stargazing Adventure

Information on Galaxies, Stars, Constellations, Planets, Moons, Comets and Asteroids
Listen to Bernard Miller describe his journey into AstroPhotography and detail how he captured this stunning image of the Sculptor Galaxy.
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Drew Evans talks about his passion for astrophotography, the equipment used and tips for post processing image data.
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Hear D.j Van Bourgondien as he talks about using his Celestron EdgeHD 8″ telescope to capture this image of the Fireworks Galaxy
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Below are a selection of our Articles, to find more click on one of the sections above, or use the Menu at the top of the page.
Explore subsurface oceans on Europa, Enceladus, Titan, and Ganymede. Learn how we detect hidden seas, their chemistry, energy sources, and upcoming missions.
Expert guide to H-alpha, O III, and S II imaging under city lights: filters, exposure strategy, color mapping (HOO/SHO), calibration, and processing tips.
Understand numerical aperture in light microscopy—how NA sets resolution, contrast, depth of field, and immersion choices. Learn to select and use NA effectively.