Note 20 — Chapter VIII
Reading edition
Hersch. Outl. Astr. 821. Another explanation of the variable period of Algol, is that the star is moving towards us, and therefore the light occupies less and less time to reach us.
Reading edition
Hersch. Outl. Astr. 821. Another explanation of the variable period of Algol, is that the star is moving towards us, and therefore the light occupies less and less time to reach us.