The Origin of the Moon
1986; American Association for the Advancement of Science; Volume: 231; Issue: 4736 Linguagem: Inglês
10.1126/science.231.4736.341
ISSN1095-9203
Autores Tópico(s)Astrophysics and Star Formation Studies
ResumoThe origin of the moon is considered within the theory of formation of the terrestrial planets by accumulation of planetesimals. The theory predicts the occurrence of giant impacts, suggesting that the moon formed after a roughly Mars-sized body impacted on the protoearth. The impact blasted portions of the protoearth and the impacting body into geocentric orbit, forming a prelunar disk from which the moon later accreted. Although other mechanisms for formation of the moon appear to be dynamically impossible or implausible, fundamental questions must be answered before a giant impact origin can be considered both possible and probable.
Referência(s)