Middle age

Used for middle aged, age 40-60

Beyer Robert A1

Portrait of Beyer

Barton Henry A1

Portrait of Barton

Baker William A1

Portrait of William Baker

Brodsky Marc A1

Portrait of Marc Brodsky

Harris Katherine A1

Katherine Harris

Vaucouleurs Gerard de A1

Gerard de Vaucouleurs

Casimir Hendrik A2

Portrait of Casimir

Aigrain Pierre A1

Portrait of Aigrain

Friedman Herbert A1

Royal Astronomical Society Medalist

Ewald Paul A1

Paul Ewald Portrait