Astronomy
Astronomy
DARWIN, G.H. - ANNOUNCING THE "RESONANCE THEORY" OF THE ORIGIN OF THE MOON.
On the Procession of a Viscous..(London, Harrison and Sons, 1880).
JANSSEN, PIERRE JULES CÉSAR - THE DISCOVERY OF HELIUM IN THE SUN.
Éclipse de Soleil du 18 Aout 1..Paris, G. Masson, 1878.