question archive Today, Andromeda is moving with speed -110 km/s towards the Milky Way, and Hubble's law is v = H0d
Today, Andromeda is moving with speed -110 km/s towards the Milky Way, and Hubble's law is v = H0d
Subject:Earth SciencePrice: Bought3
Today, Andromeda is moving with speed -110 km/s towards the Milky Way, and Hubble's law is v = H0d. Consider now a closed Universe, and the future time when the scale radius will go back to the value R = 1 of today. What will happen, at that future time?
(a) Hubble's law will be v = H0d, and Andromeda is moving still at -110 km/s towards the Milky Way.
(b) Hubble's law will be v = H0d, and Andromeda is moving at +110 km/s away from the Milky Way.
(c) Hubble's law will be v = −H0d, and Andromeda is moving still at -110 km/s towards the Milky Way.
(d) Hubble's law will be v = −H0d, and Andromeda is moving at +110 km/s away from the Milky Way.
(e) Hubble's law will be v = −H0d, but I don't have enough information to know Andromeda's velocity.
