La vita sul pianeta Marte

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Language: Italian
Wordcount: 20,671 / 76 pg
LoC Category: Q
Downloads: 3,740
mnybks.net#: 3877
Genre: Science
Excerpt

segno di progresso e di forza. Ma torniamo al nostro argomento.


II.

Nella scala delle orbite planetarie, la Terra occupa, a partir dal Sole, il terzo posto e Marte il quarto. L'orbita di Marte comprende quindi dentro di sè l'orbita della Terra; ed è di essa più grande nel rapporto di circa 3 a 2. Ambedue le orbite sono di forma leggermente ovale, ma così per l'una come per l'altra la differenza fra il più grande e il più piccolo diametro è relativamente trascurabile: in altre parole, la differenza di queste orbite da un circolo perfetto è assai poca, tanto che occorrebbero disegni in molto grande scala per renderla sensibile a misure fatte col compasso. Il Sole non si trova nel centro nè dell'una, nè dell'altra, e questo difetto di centratura è assai maggiore per Marte che per la Terra. La Terra gira intorno al Sole in ragione di 30 chilometri per minuto secondo; Marte in ragione di 24 chilometri. Essendo questi p

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Average Rating of 5 from 1 reviews: *****
2008.03.12
MATTEO
*****

bello


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