Lunar crater
crater on Earth's moon
Rittenhouse
Ritz
Roberts
Robertson
Rowland
Rumford
Rutherford
Rydberg
Ryder
Olivier
Schneller
Schuster
Scobee
Seares
Seidel
MacMillan
Marci
Born
Seyfert
Saenger
Sanford
Shi Shen
Shorty
Sikorsky
Smith
Sommerfeld
Atwood
Stark
Stearns
Stefan
Stein
Steno
Sternfeld
Stetson
Theon Senior
Stoney
Stratton
Sumner
Swann
Einstein
Wildt
Bailly
Geissler
Thomson
Avery
Aloha
Back
Hansen
Baily
Balboa