| Hadley, John | John Hadley: Pioneering Astronomer and … | Astronomers |
| Hadley’s Sextant | Navigating the Stars: The Legacy of Had… | Galactic Astronomy |
| Hale, George Ellery | George Ellery Hale: A Visionary Archite… | Astronomers |
| Hall, Asaph | Asaph Hall: Unveiling the Secrets of Ma… | Astronomers |
| Halley, Edmond | Edmond Halley: The Man Who Brought Us t… | Astronomers |
| Halley’s Comet | Halley's Comet: A Celestial Spectacle w… | Solar System Astr… |
| Halley’s Method of Determining the Solar Parallax | Unveiling the Sun's Distance: Halley's … | Solar System Astr… |
| Hamal | Hamal: The Ram's Head Star Hamal, a na… | Stellar Astronomy |
| Harding, Karl Ludwig | Karl Ludwig Harding: The Man Who Discov… | Astronomers |
| Harmonic Circle | The Harmonic Circle: A Tool for Unveili… | Galactic Astronomy |
| Harmonic Ellipse | Unveiling the Hidden Dance: Understandi… | Galactic Astronomy |
| Haro, Guillermo | Guillermo Haro: A Pioneer in Stellar Ev… | Astronomers |
| Harriot, Thomas | Thomas Harriot: The Unsung Hero of Luna… | Astronomers |
| Harrison, John | John Harrison: The Man Who Conquered Lo… | Astronomers |
| Hartmann, Johannes Franz | Johannes Franz Hartmann: A Pioneer in S… | Astronomers |
| Harvest Moon | The Harvest Moon: A Celestial Beacon fo… | Galactic Astronomy |
| Hay, William Thompson | The Comedian Who Conquered the Cosmos: … | Astronomers |
| Hebe | Hebe: A Rocky Wanderer Between Mars and… | Galactic Astronomy |
| Heis, Eduard | Eduard Heis: A Keen Eye on the Cosmic S… | Astronomers |
| Heliacal | The Dance of Stars and Sun: Understandi… | Galactic Astronomy |
