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- Hour Angle The Hour Angle: Timekeeping in the Stellar Sky In the vast canvas of the night… Stellar Astronomy
- Hour Circle Navigating the Cosmos: The Hour Circle in Stellar Astronomy Imagine you're sta… Stellar Astronomy
- Howse, Derek Derek Howse: A Stellar Navigator Derek Howse, a name synonymous with navigatio… Astronomers
- Hubble, Edwin Powell Edwin Hubble: A Giant Among Stars Edwin Powell Hubble, born in 1889, was a man… Astronomers
- Huggins, William William Huggins: A Pioneer in the Dawn of Stellar Spectroscopy William Huggins… Astronomers
- Humason, Milton La Salle Milton La Salle Humason: A Self-Taught Giant in the Realm of Galaxies Milton L… Astronomers
- Hunter’s Moon The Hunter's Moon: A Celestial Spectacle Marking the Turn of the Season In the… Solar System Astronomy
- Huygens, Christiaan Christiaan Huygens: A Master of the Skies and Time Christiaan Huygens (1629-16… Astronomers
- Hyades The Hyades: A V-Shaped Family in Taurus Gazing at the night sky, you might not… Stellar Astronomy
- Hydra (the Female Water Snake) The Hydra: A Serpent of the Stars In the celestial tapestry, constellations … Constellations
- Hydrus (the Male Water Snake) Hydrus: The Water Snake of the Southern Sky In the vast celestial canvas of … Constellations
- Hyperbola Hyperbolas in the Stellar Cosmos: A Journey Beyond the Familiar In the vast ex… Stellar Astronomy
- Hyperion Hyperion: Saturn's Oddball Moon Hyperion, the seventh moon of Saturn, is a fas… Solar System Astronomy
- Iklil, or Iklil-al-Jebhah Iklil: The Crown of the Scorpion In the tapestry of the night sky, the constel… Stellar Astronomy
- Illumination of the Field of View Illuminating the Cosmos: Techniques for Measuring Celestial Bodies In the purs… Stellar Astronomy
- Immersion Immersion: The Celestial Hide-and-Seek In the vast expanse of the cosmos, cele… Solar System Astronomy
- Inclination of Orbit Unveiling the Tilt: Understanding Orbital Inclination in Stellar Astronomy In … Stellar Astronomy
- Indiction The Indiction: A Forgotten Unit of Time in Stellar Astronomy In the vast expan… Stellar Astronomy
- Indus (the Indian) Indus: A Southern Constellation Unveiling Ancient Indian Origins The night s… Constellations
- Inequality, Moon’s Parallactic The Moon's Dance: Understanding Parallactic Inequality The moon, our celestial… Solar System Astronomy
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