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- Sadachbia Sadachbia: A Tale of Two Stars in Aquarius The celestial tapestry is woven wit… Stellar Astronomy
- Sadalmelik Sadalmelik: The "Good Fortune of the King" In the celestial tapestry, stars ho… Stellar Astronomy
- Sadalsund Sadalsuud: The Star of Fortunes In the vast expanse of the night sky, constell… Stellar Astronomy
- Sagan, Carl Carl Sagan: A Visionary Who Brought the Cosmos to Earth Carl Sagan, a name syn… Astronomers
- Sagittarius (the Archer) The Archer: Sagittarius, a Constellation of Stars and Stories Sagittarius, t… Constellations
- Sagitta (the Arrow) Sagitta: The Little Arrow Piercing the Night Sagitta, Latin for "arrow," is … Constellations
- Saros The Saros: Unveiling the Secrets of Eclipses The heavens have always held a po… Solar System Astronomy
- Satellites The Celestial Dance: Satellites in Stellar Astronomy In the grand theatre of t… Stellar Astronomy
- Saturn Saturn: The Jewel of the Solar System Saturn, the second largest planet in our… Solar System Astronomy
- Schedir Schedir: The Variable Star at the Heart of Cassiopeia Schedir, a name sometime… Stellar Astronomy
- Scheiner, Christoph Christoph Scheiner: Sunspots, Controversy, and Galileo's Downfall Christoph Sc… Astronomers
- Schiaparelli, Giovanni Virginio Schiaparelli: The Man Who Saw Canals on Mars Giovanni Virginio Schiaparelli, b… Astronomers
- Schlesinger, Frank Frank Schlesinger: A Pioneer in Stellar Parallax Frank Schlesinger (1871-1943)… Astronomers
- Schmidt, Julius (actually Johann Friedrich Julius) Johann Friedrich Julius Schmidt: A Pioneer of Lunar Mapping and Stellar Discove… Astronomers
- Schonfeld, Eduard Eduard Schönfeld: Charting the Southern Skies Eduard Schönfeld (1828-1891) was… Astronomers
- Schroter, Johann Hieronymus Johann Hieronymus Schröter: A Lost Legacy of Lunar and Planetary Observation J… Astronomers
- Schwabe, Heinrich Heinrich Schwabe: The Apothecary Who Uncovered the Sun's Secret Rhythm Heinric… Astronomers
- Schwarzschild, Karl Karl Schwarzschild: A Pioneer in Theoretical Astrophysics Karl Schwarzschild (… Astronomers
- Schwarzschild, Martin Martin Schwarzschild: A Stellar Architect Martin Schwarzschild (1912-1997) was… Astronomers
- Scintillation The Twinkle of the Stars: Understanding Stellar Scintillation The twinkling of… Stellar Astronomy
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