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- Fabricius, David David Fabricius: The Minister-Astronomer Who Met a Stellar End David Fabricius… Astronomers
- Fabricius, Johann Johann Fabricius: A Pioneer in Sunspot Observation Johann Fabricius, born in 1… Astronomers
- Faculse of the Sun Faculae: Bright Spots on the Sun's Surface The Sun, our nearest star, is a dyn… Stellar Astronomy
- Falcated The Falcated Moon, Mercury, and Venus: A Celestial Dance of Light and Shadow I… Stellar Astronomy
- Fallows, Fearon The Pioneering Spirit of a Stargazer: The Life and Legacy of William Fallows W… Astronomers
- Fauth, Philipp Johann Heinrich Philipp Johann Heinrich Fauth: A Lunar Cartographer Haunted by Ice Philipp Joh… Astronomers
- Ferguson, James From Shepherd Boy to Astronomical Pioneer: James Ferguson's Enduring Legacy Ja… Astronomers
- Field of View Peering Through the Cosmic Window: Understanding Field of View in Stellar Astro… Stellar Astronomy
- Filar Micrometer The Filar Micrometer: A Wire-Based Tool for Stellar Astronomy In the early day… Stellar Astronomy
- First Quarter The First Quarter Moon: A Celestial Quarterback In the celestial arena of the … Solar System Astronomy
- Flammarion, Camille Camille Flammarion: A Stargazer Who Bridged Science and the Public Camille Fla… Astronomers
- Flamsteed, John John Flamsteed: The Architect of a Starry Legacy John Flamsteed, born in 1646,… Astronomers
- Flat The Flat: A Tiny Mirror with a Big Role in Telescopic Exploration While the gr… Astronomical Instrumentation
- Fleming, Wilhelmina Wilhelmina Fleming: A Pioneer of the Stars Born in Scotland in 1857, Wilhelmin… Astronomers
- Flora Flora: A Tiny World in the Asteroid Belt The term "Flora" in Stellar Astronomy… Solar System Astronomy
- Foca Foca: A Stellar Name with a Touch of History In the vast celestial tapestry, s… Stellar Astronomy
- Foci of an Ellipse The Foci of Ellipses: Guiding Stars in Stellar Astronomy In the vast expanse… Stellar Astronomy
- Focus The Stellar Focus: Where Light Converges and Secrets are Revealed In the realm… Stellar Astronomy
- Fomalliaut Fomalhaut: The Mouth of the Southern Fish Fomalhaut, the brightest star in the… Stellar Astronomy
- Fontana, Francisco Fontana, Francisco: A Lawyer's Glimpse of the Cosmos Francisco Fontana, born i… Astronomers
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