So what's this i hear about the inbuilt pheromone radar system we have that checks out likely mates for their suitability? I know that everyone has their own unique scent, and that people that share certain characteristics have similar scents, and that there are those who's pheromones we simply "like" or "dislike"... I've also heard that birth control pills can cut off the receptability of this sense. I just find this whole thing very interesting and would like to know more about it. How does it work exactly? How does it vary from person to person? How can you become more aware of and in-tune to this sort of sense (if it exists? ) i would at least like to be directed to resources where i could learn more about it if there isn't much you know about it. Thank you.
This week, Felicity Bedford sniffed out the answer with Tristan Wyatt from the University of Oxford...
Yes alancalverd, Mon, 7th Mar 2016
But not if there are other large bodies in the same system. Then the disturbance from gravity from them will destabilise the orbits in a few million years quite a lot. This, like a Lagrange point, is only true in a system with 3 masses and is stable. Add more and the stability is not true over long periods. SeanB, Mon, 7th Mar 2016
Haha, funny, is this a trick question?
Would it matter how big two planets were in the same orbit?
how did this thread get under pheromones? cheryl j, Sun, 13th Mar 2016
The scientists seem to have answered a different question to the one asked. The questioner asked if two planets could share the same orbit, not if they could orbit around each other. I think the questioner may have been wondering if a second planet could share the same orbit as Earth but be on the other side of the Sun for example Russell, Sat, 9th Apr 2016
There are a couple of naming errors to point out here: Pluto's moon is Charon, not Sharon. And most importantly, the twin-sunned word in Star Wars was called Tatooine, not Dantooine :) PhilJ, Thu, 14th Apr 2016
One way to answer the question of whether two planets can use the same orbit, is to first look at the planet Saturn and its moons. The moons of Saturn do not use the same orbit, but the rings of Saturn do use the same orbit. The difference, I see, has to do with the amount of gravity in the sub-units of the entries in the same orbit. The ring is composed of small units, each of which have limited gravitational impact on each other. We have tons of space debris orbiting the earth some of which uses the same orbit. The moons of Saturn have more gravitational influence on each other.