Über die Entstehung des Planetensystems. pp. 319-355.
Über die Entstehung des Planetensystems. pp. 319-355.
Über die Entstehung des Planetensystems. pp. 319-355.
Über die Entstehung des Planetensystems. pp. 319-355.
Über die Entstehung des Planetensystems. pp. 319-355.

Über die Entstehung des Planetensystems. pp. 319-355.

Berlin: Julius Springer, 1944.

1st Edition. Soft cover. 4to - over 9¾ - 12" tall. Very Good. Item #002796

Offprint from: Zeitschrift für Astrophysik, vol. 22, 1944. Berlin: Julius Springer, 1944. 8vo (230 x 155 mm). Stapled as issued (spine enforced with yellow tape). Internally somewhat browned throughout. Provenance: small coat of arms stamp. Inscribed and monogrammed 'Mit freundlichen Grüssen C. F.' by the author in pencil to top margin of first page. ----

RARE FIRST EDITION. In this groundbreaking paper on the origin of the solar system and planet formation, Weizäcker introduced a new idea that within the protoplanetary disc a pattern of turbulence-induced eddies was set up. "A suitable combination of clockwise rotation of each vortex with anti-clockwise rotation of the whole system can lead to individual elements of the disc movin around the central mass in Keplerian orbits. Thus there would be very little dissipation of energy due to the overall motion of the system but material would be colliding at high relative velocity at the boundary between vortices, as shown at the point P. According to the von Weizsacker model, in such regions small roller-bearing eddies would form and in these regions, where matter was heavily interacting, material would coalesce to give condensations. The condensations would form in rings and once all condensations in a ring had come together there would be a family of planets. If there were five vortices to a ring then von Weizsacker showed that the orbital radii would give something similar to Bode's law. (Woolfson, M. M. The Origin and Evolution of the Solar System, CRC Press, 2000, pp. 136-7).

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