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Physics
Astronomy
Celestial Events
All Subcategories (22)
Asteroid impacts
Asteroid Trajectories
Close Approaches
Comet Collisions
Comets
Eclipses
Lunar Eclipse
Lunar Eclipses
Lunar Phases
Meteor Showers
Meteor Sightings
Moon Phases
Moon Phases and Viewing Times
Moon Transits
Moonrise and Moonset
Shooting Stars
Solar Eclipses
Solstices
Solstices and Equinoxes
Sunrise
Sunset and Evening Star
Transits
Parent Categories (8)
Astronomy
Astronomy and Earth Science
Astronomy and Space
Astronomy/Earth Science
Earth and Space
Natural Phenomena
Nature
Science and Astronomy