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Sagitta, Constellation

Sagittarius, Constellation

Scheiner, Julius

Schiaparelli, Giovann i

Schlesinger, Frank

Schwassmann, Friedrich Karl Arnold

Scorpius, Constellation

Sculptor, Constellation

Scutum, Constellation

See, Thomas Jefferson Jackson

Seeliger, Hugo von

Serpens, Constellation

Sextans, Constellation

Sitter, Willem de

Spitaler, Rudolf Ferdinand

Strabo (crater)

Strömgren, Svante Elis

Struve, Gustav Wilhelm Ludwig

Struve, Karl Hermann

Struve, Otto Wilhelm von

Astronomy Encyclopedia

Hellenica World - Scientific Library