3 ms·
Isn't extra acceleration what dark energy is supposed to explain? (Maybe "explain" is the wrong word. :-) I haven't seen anyone say this (probably for some good
by pjungwir 8y ago
Isn't extra acceleration what dark energy is supposed to explain? (Maybe "explain" is the wrong word. :-) I haven't seen anyone say this (probably for some good reason), but maybe 'Oumuamua's acceleration is from the same source? I'm curious what more knowledgeable people have to say about that.
- saagarjha 8y agoThe "acceleration" dark energy is supposed to explain is with regards to the expansion of the universe, which would have very little effect on anything on scales this small.
- not_kurt_godel 8y agoDark energy is an expansion of spacetime itself that is uniformly present throughout the entire universe. If it were responsible for ʻOumuamua's acceleration it would have been followed by our entire solar system being shredded down to subatomic particles shortly afterwards - see https://en.wikipedia.org/wiki/Big_Rip https://en.wikipedia.org/wiki/Big_Rip