Anonymous
Anonymous asked in Science & MathematicsAstronomy & Space · 1 decade ago

Do stars have planets revolving around them?

Obviously it would be an unknown solar system, but still.

Our sun is a star, right? We revolve around it. Could other unknown planets be circling the stars in the night sky right now??? And if we were on another planet galaxies away (just pretend here,) would we see our sun as a normal star? This is just an interesting question to me, and I want to see others opinion on this. Plus, it's something to think about...

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  • Anonymous
    1 decade ago
    Favorite Answer

    Of course.

    As of this month, there are 264 exoplanets (planets orbiting other stars) that we know of. Scientists estimate that at least 10% of sunlike stars have planets.

    Our sun is an average star, so it would be visible to beings on other planets within about 10 light years or so. There is only two exoplanets known so far in that distance (Epsilon Eridani B and C at 10.5 light years distance).

  • 4 years ago

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    RE:

    Do stars have planets revolving around them?

    Obviously it would be an unknown solar system, but still.

    Our sun is a star, right? We revolve around it. Could other unknown planets be circling the stars in the night sky right now??? And if we were on another planet galaxies away (just pretend here,) would we see our sun as a normal star? This...

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  • 1 decade ago

    Yes. It has been proven by science. Such planets are called extrasolar planets.

    Interestingly science previously had to state that there were no extrasolar planets regardless that our sun is a common star like so many others. It is not allowed to state in science that something is very likely true because logically it seems so. Science can only state what has been proven up to any certain point.

    Furthermore, at this time, there exist no photographs of an extrasolar planet. The existence of extrasolar planets has been proven by very fine measurements of the motion of stars. Simply put, if a star wobbles, it is because there is something orbiting it that pulls it slightly around. Precise measurement has allowed scientists to calculate the amount of mass that an extrasolar planet would have to have in order to make a star wobble a certain amount. The other thing about a star's wobble is how "quickly" it wobbles, which tells us how far from the star the planet is orbiting.

    Here is a site dedicated to extrasolar planets - http://www.astro.uiuc.edu/~kaler/sow/pp.html

    More than 200 extrasolar planets have been discovered!

  • 1 decade ago

    Other stars are most likely to have planets in orbit around them, many have been observed to have them. If you were on a planet in a galaxy far away you would be able to see our sun as an individual star, the distance would be too great, but from a planet of a star in our own galaxy you could see our sun as being just another star. I hope this has helped you.

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  • 3 years ago

    Do All Stars Have Planets

  • 1 decade ago

    There are multiple other solar systems within our own galaxy. If you were on another planet, you most likely wouldn't even be able to see our sun; it's relatively small, as far as stars go, and it's off in the distant reaches of our galaxy.

  • Anonymous
    1 decade ago

    I suggest reading a newspaper. There's been one in the news for the better part of a week now.

    We would see our sun as a normal star from no further away than about 30 light years, and it would be one of the fainter ones.

  • 1 decade ago

    The technology already exists to pretty much answer that. I believe I heard a figure last week that about 350 "hot jupiters" have been detected in orbit around local stars.

    Sensitive instruments are used to precisely measure the position of a star in the sky. We are capable of detecting "wobbles" in star positions, at least in the case of middle-sized stars and relatively-large planets. So far we are still working on more-sensitive instruments which could detect planets of any size around very large stars, or smaller planets around stars of approximately our sun's size.

    The term "hot Jupiters" refers to large planets (llarger or roughly the size of our Jupiter, the largest planet in our solar system, about ten times earth diameter) which would be massive enough to create a detectable wobble in the position of a star. The star would have to be small enough for the planet's mass to cause the "wobble", the planet would have to be large enough, and the distance between them would have to be relatively small: their gravitational attraction is proportional to the inverse of their distance.

    In such cases, the distance is close enough that the gravity also affects the planet. Typically this produces a planet which is "hot"- in that the constant gravity distortion of the nearby star, would keep the planet from ever being habitable by life as we know it, and it would also be constantly buffeted by solar winds (all of the nuclear radiation and heat/light that the star produces). It would make a very unpleasant place to visit.

    Partly due to the extreme heat, a lot of the materials would be in gaseous states, possibly the rest molten, and not much in the way of solid surfaces anyway.

    What we still seek to do is detect "rocky" planets- smaller, usually somewhat farther away from the star, less affected by the star's nuclear furnace, and more likely to be able to support life. They are usually a lot less massive (in Earth's case we are about one-thousandth the mass of Jupiter) hence harder to detect: we would cause much less "wobble" of our own star, given the presence of several much-larger planets already, and are also farther away than a "hot Jupiter" would be.

    Given that the above discoveries are only about 10 years old themselves, there is no reason to assume that we would not be able to detect "earthlike" planets routinely within about another 5 to ten years, and likely identify several hundred of them within my expected lifetime.

  • 1 decade ago

    depending on the mass of the star and it's age, ejection material can provide the nucleus needed for planet formation.

    the force of gravity from stars can also capture smaller massed objects and put them in a stellar orbit creating system much like our solar system.

    and yes, if you could palce yourself on another nearby planetary system and looked towards our solar system, you might see our sun if you knew where to look. it is doubtful you would see any planets though.

  • Anonymous
    1 decade ago

    as of now, we know of approximatelly 254 confirmed star systems with planets.

    EDIT

    from another galaxy, our sun would blend in with the overall stellar population, as our home star is on the low end of the luminosity scale.

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