- #1
jonnylockers
- 3
- 0
hi, i don't know if this is in the correct place but I've got a question that has puzzled me.
i know that the stars on the outer edge of galaxies are moving too fast to be in a stable orbit without flying off away from the galaxy, does this mean that the gravity that the outer stars experience are from a central mass like a black hole, or is it the cumulative effect from every other star in the galaxy, so in effect instead of the star circling a central mass they are actually circling a much larger mass of every other star that is closer to the centre of the galaxy?
I know that gravity will effect every other star but will it effect it in the way i described or in other ways?
Thanks for any answers, its probably obvious but its something I've wondered about for a long time.
i know that the stars on the outer edge of galaxies are moving too fast to be in a stable orbit without flying off away from the galaxy, does this mean that the gravity that the outer stars experience are from a central mass like a black hole, or is it the cumulative effect from every other star in the galaxy, so in effect instead of the star circling a central mass they are actually circling a much larger mass of every other star that is closer to the centre of the galaxy?
I know that gravity will effect every other star but will it effect it in the way i described or in other ways?
Thanks for any answers, its probably obvious but its something I've wondered about for a long time.