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- Gravitation The Cosmic Glue: Gravitation in Stellar Astronomy The universe, in all its vas… Stellar Astronomy
- Great Circle Navigating the Cosmos: The Importance of Great Circles in Stellar Astronomy Wh… Stellar Astronomy
- Green, Charles Charles Green: A Stargazer Lost at Sea Charles Green, a name less familiar tha… Astronomers
- Gregorian Reform of Calendar The Gregorian Calendar: A Stellar Timekeeper While the Gregorian calendar is a… Stellar Astronomy
- Gregorian Telescope The Gregorian Telescope: A Unique Design in Stellar Astronomy The Gregorian te… Stellar Astronomy
- Gregory, James James Gregory: The Unsung Hero of Reflecting Telescopes James Gregory, a Scott… Astronomers
- Grimaldi, Francesco Maria Francesco Maria Grimaldi: A Jesuit Astronomer and the Dawn of Diffraction Fran… Astronomers
- Gruithuisen, Franz von Paula Franz von Paula Gruithuisen: The Moon's Architect and a Controversial Figure F… Astronomers
- Grummium Grummium: A Forgotten Name for a Stellar Giant While most stargazers know the … Stellar Astronomy
- Grus (the Crane) Grus: The Crane in the Southern Sky Grus, Latin for "crane", is a constellat… Constellations
- Gum, Colin Colin Gum: A Stargazer Who Lit Up the Southern Sky Colin Stanley Gum, a name f… Astronomers
- Gyroscope Gyroscopes in Stellar Astronomy: Navigating the Celestial Seas The humble spin… Stellar Astronomy
- Hadley, John John Hadley: Pioneering Astronomer and Innovator of Navigation John Hadley (16… Astronomers
- Hadley’s Sextant Navigating the Stars: The Legacy of Hadley's Sextant The vast expanse of the c… Astronomical Instrumentation
- Hale, George Ellery George Ellery Hale: A Visionary Architect of Modern Astronomy George Ellery Ha… Astronomers
- Hall, Asaph Asaph Hall: Unveiling the Secrets of Mars Asaph Hall, born in 1829 and passing… Astronomers
- Halley, Edmond Edmond Halley: The Man Who Brought Us the Comet Edmond Halley, born in 1656, i… Astronomers
- Halley’s Comet Halley's Comet: A Celestial Spectacle with a 76-Year Cycle Halley's Comet, a c… Solar System Astronomy
- Halley’s Method of Determining the Solar Parallax Unveiling the Sun's Distance: Halley's Method and the Venus Transit The Sun, o… Solar System Astronomy
- Hamal Hamal: The Ram's Head Star Hamal, a name sometimes applied to the star α Ariet… Stellar Astronomy
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