Have all planets established orbits around stars?

Answer 1

Everyone else has given you an incorrect answer (as usual).

You are speaking of a "Rogue planet" or a "Free wanderer" a web search will give you all the info you need. Additionally, "Sky and telescope" magazine did a piece on them a few years back.

See the link below

Answer 2

Lampoilman is the only correct answer.

Planets are formed as a natural part of star formation (that does not imply that all stars have planets). Planets do not form in the void away from stars and then, somehow, find and establish an orbit around a star. So, no doubt, most planets orbit stars.

But that does not imply that all stars orbit stars. There can be rogue planets which no longer orbit stars, though they once did. They could have been expelled from orbit by the explosion of a star, although it's unlikely the planet survived that. The close passage of one star near a second one can certainly rip planets from orbit and fling them into space away from any star.

How one detects rogue planets from a distance is tough, since their gravitational fields will be small compared to a star and they will be cold and dark.

Answer 3

All planets orbit stars,once in orbit it would probably stay there.
When the solar system formed[here or elsewhere] if a planet did not enter an orbit it would either crash into it"s sun or spiral away.
I guess you could infer that this planet did not establish an orbit.

Answer 4

by definition, yes
cause a planet is a planet because it is in orbit around a star.
anything else would be a dark stellar body, and as far as i know noone ever observed a planetsized body which is not in orbit around a star, so far.
In these days it becomes very obvious that it is the definition what makes something a 'planet', since astronomers decided to remove Pluto from the list, for example.
Its hard to find a planetsized body NOT in orbit around a star, and in case we ever find such body it won't be a planet, cause the current definition for example says it must be in orbit to be a planet.

Answer 5

Yes, all have establisheD. In fact, every planet revolves around a star. Planets from Mercury to Xena have established around the sun.

Answer 6

Yes, they do! If they were travelling rocks, even round, as Earth, or/and as big as an average planet, they would not be called "planet".
The word "planet" requires the existance of a sun and an orbit.

Answer 7

all planets ofcourse have established orbits around stars.(See the definition of planet).

Answer 8

yes for god's sake, or they have already collided with each other !.