Strange New 'Twin' Worlds Found

toomanyairmiles writes "The BBC reports on the the discovery of 'twin worlds' which orbit each other, successfully blurring the line between planets and stars. 'Their existence challenges current theories about the formation of planets and stars.' according to the Journal of Science article which reports their existence. 'The pair belongs to what some astronomers believe is a new class of planet-like objects floating through space; so-called planetary mass objects, or "planemos", which are not bound to stars.'"

Comments

Re:Just goes to show...

[ajs]

It also shows that no scientific theory can be trusted to be valid past lunch, we just never know when we'll find something new that blows the standing knowledge out of the water.

Hurm... well, yes and no. Theory gives us an excellent start in almost all areas, but theory is only (as a maximum) as valuable as the data on which it is based. We have very little data about the composition of our galaxy (less, even, than we do about the earth, millions of years ago), so it is not shocking that we would find major gaps in our understanding (we only just recently discovered the supermassive black hole at the center of our galaxy (and most or all others).

Can it all really be random?

First off, that's a non-sequitor. Second, "random" isn't the word you want there. When you are talking about large-scale processes, you can use ranomness as a tool to understand, but as we probe the nature of the universe we have consistently found that things that appear to have no order, are in fact very ordered. When you see two planetary objects orbiting one another, that's not random, it's the result of the gravitational forces exerted by those two bodies and, to increasingly lesser degrees, everything else in the universe. If it appears random, that's just becuase you had too little information about the forces involved.