- #1
Michel_vdg
- 107
- 1
Hi,
I made a (rough) calculation of how far the Moon would be moving away from Earth according to Hubble's law = 72.6 (km/s)/Mpc
--
1 megaParsec = 3.08 × 1022 m ≈ 4 × 1022 m
Distance between Moon and Earth ≈ 4 x 108 m
Expansion rate ≈ 7.2 104 (m/s)/4 × 1022 m = 7.2 (m/s)/4 × 1018 m
Thus expansion for Earth - Moon ≈ 7.2 x 10-10 m/s
--
Is this calculation correct? If so, than that it would be about one picometer per second, or is Earth's gravity force simply keeping the Moon in it place?
Thanks,
m.
I made a (rough) calculation of how far the Moon would be moving away from Earth according to Hubble's law = 72.6 (km/s)/Mpc
--
1 megaParsec = 3.08 × 1022 m ≈ 4 × 1022 m
Distance between Moon and Earth ≈ 4 x 108 m
Expansion rate ≈ 7.2 104 (m/s)/4 × 1022 m = 7.2 (m/s)/4 × 1018 m
Thus expansion for Earth - Moon ≈ 7.2 x 10-10 m/s
--
Is this calculation correct? If so, than that it would be about one picometer per second, or is Earth's gravity force simply keeping the Moon in it place?
Thanks,
m.