COM or COG?

[rkman]

Comes down to the same thing, but rockets don't have a substantial amount of gravity. So CoM seems more appropriate.

[SmallChange]

I had never really thought about my usage of the two terms..

I've found I use both. Whenever dealing with something KSP related, I always say Center of Mass. For day to day conversations, if the term were to ever come up, I'm sure I would say Center of Gravity. Not sure why that is...

[Decho]

I take centre of mass to be the density-weighted mid point of an object, ie. the point about which it rotates, whereas I would only use centre of gravity to describe the point about which two bodies interacting gravitationally rotate, eg. the point about which the moon and Earth rotate in their orbit (so close to but not quite the centre of mass of the Earth). Not sure I described that well but that's what my Physics background has led me to believe.

[CalculusWarrior]

I take centre of mass to be the density-weighted mid point of an object, ie. the point about which it rotates, whereas I would only use centre of gravity to describe the point about which two bodies interacting gravitationally rotate, eg. the point about which the moon and Earth rotate in their orbit (so close to but not quite the centre of mass of the Earth). Not sure I described that well but that's what my Physics background has led me to believe.

That makes sense, it's a good way to think about it.

[Piggius_Max]

I think it's possible CoG is a British thing, that's what we're taught at least...

[KinkyFerrets]

CoG. Hold over from flight school. For all intent and purpose, the two are interchangeable.

[Flixxbeatz]

menter of cass or genter of cravity?

[Rickenbacker]

Depends. I'm a pilot, so I was taught Center of Gravity. But in space there is no gravity, so it makes more sense to talk about Center of Mass, I just use CoG out of habit .