Astronomical Instrument

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Physical Realm
Universe Astronomical Instrument
Galaxy Milky Way, Andromeda
Planetary System Star, Brown Dwarf, Planet, Moon

Solar System Sun
Terrestrial Planet Mercury, Venus, Earth (Moon), Mars
Asteroid Belt Ceres, Vesta
Jovian Planet Jupiter, Saturn, Uranus, Neptune
Trans-Neptunian Object
Kuiper Belt Pluto, Haumea, Makemake
Scattered Disc Eris, Sedna, Planet X
Oort Cloud Etc. Scholz’s Star
Small Body Comet, Centaur, Asteroid


These are organized by a classification scheme developed exclusively for Cosma. More…



Observational astronomy is a division of astronomy that is concerned with recording data about the observable universe, in contrast with theoretical astronomy, which is mainly concerned with calculating the measurable implications of physical models. It is the practice and study of observing celestial objects with the use of telescopes and other astronomical instruments.

Galileo Galilei turned a telescope to the heavens and recorded what he saw. Since that time, observational astronomy has made steady advances with each improvement in a variety astronomical instruments and related methods. — Wikipedia

Observational Astronomy (Eric Weisstein’s World of Astronomy, Wolfram Research)
Observatories & Telescopes (Wolfram Alpha)
Encyclopædia Britannica

Astronomical Instruments, Category (Wikipedia)
Astronomical Instruments, List (Wikipedia)


Australian Astronomical Observatory (AAO)



Galileo and the telescope (The Science Geek)
The History of Astronomy (Ask an Astronomer, Cornell University)


Smithsonian National Air and Space Museum


WorldCat, Library of Congress, UPenn Online Books, Open Library



Telescopes (NASA.Gov)
Observational Astronomy (Ask an Astronomer, Cornell University)
Telescopes (Ask an Astronomer, Cornell University)
Telescopes (Cosmos4Kids)


Crash Course Astronomy (YouTube)

OER Commons: Open Educational Resources



Careers in Astronomy (Ask an Astronomer, Cornell University)


Sky & Telescope, ScienceDaily,, NPR Archives






Acapella Science (YouTube Channel)



Observing News & Current Celestial Events – Sky & Telescope The essential guide to astronomy / All Sky & Telescope ( content is copyrighted. Please contact us for reuse permissions.

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Space Telescopes News -- ScienceDaily Space Telescopes. Astronomy articles and pictures from NASA's Hubble Space Telescope and Chandra X-Ray Telescope and many other leading astronomy institutes from around the world.

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