Are we a two star system with a burned out twin?
535492
The reason we thought there was an object waiting out there tugging at Neptune was because we had bad data on the mass of the planet, when the Voyager 2 spacecraft reached Neptune we found out that our estimate was off by half a percent, putting the new value into our calculations (along with a bunch of other new values the Voyagers discovered) and running them resulting in a perfect match of the observations.\n\nSo to put things simply, there is nothing strange going on with Neptune's orbit and no reason to assume that there is a large body pulling on it.\n\nAlso note that Jupiter is not a star and not even close to being one so we can't claim to be a binary because of that.  It might be possible that there is a Brown Dwarf out there but we should have detected it with IR instruments by now given how close it would have to be.  A black hole might exist and if it isn't sucking in material would be almost completely invisible (and there really isn't much for one to suck in nor would we be in any danger), a neutron star or white dwarf I would expect us to be able to see if it were out there and if it formed in recent times we wouldn't exactly be here to ask about it.
563881
Sadly no to be an identical twin you would have to have the exact same hair partings and the same freckles and everything! It just wouldn't make sense otherwise.
461110
Yes the Sun is a star.\n\nAnd off topic...\n\nDoes anybody find excessive cutting and pasting a boor??
215254
No. Our sun is just a plain, average G2 V type dwarf. \n\nPulsars are neutronstars that send out strong radiopulses as they rotate. They were first tought to be radio beacons from some alien civilization because of the regularity of the pulse. The first one observed had a period of 1.337011 seconds. Only a neutronstar can rotate that fast. As a massive star explodes in a supernova its core collapses. As it does so it spins faster and faster like a figure skater pulling her arms in. A stellar core goes from earth size to the size of a city. \n\nWhen scientists detected a pulsar within the Crab nebula, where a supernova had obviously gone off, it was confirmed that pulstars are in fact neutronstars.
318349
Hmmm I'm not sure but since astrology doesn't bother to correct itself for the fact that the constellations have drifted one full sign over the lat 2000 years....\n\nMy fortune cookie seems to back me up on this.
726348
Well, that is one hypothesis, which is "conjecture", which is just to say it's a "great big guess".  No astronomical explanation has thus far been a satisfactory explanation, because the hypotheses fail to explain "why" comets orbit the Sun clockwise, while everything in our Solar System rotates counter-clockwise along with the counter-clockwise rotation of the Sun.\n\nMy analysis has determined that our Solar System and the Sirius Binary System are interlocked in an electromagnetic deadly dance of death in which the two systems cyclically and recurrently interpenetrate through each other every 12,000-year period.  Hence, our Solar System is on a collision course with the Sirian System.  This transversion is an extinction level event that I have identified as the Sirian-Solar Reconvergence.  The Sirian Binary rotates clockwise, thus comets are dislodged debris from the Sirian System captured within our Solar System from each Reconvergent event in which the comets retain their original clockwise rotation due to their immense velocity that cannot be overcome by the rotational influence of our counter-clockwise system. \n\nThe Sirian-Solar Reconvergence also explains all the crater impacting that has scared all the solid-body planets.  As the cosmocataclysm ensues all the debris from the various debris belts in both systems dislodge and rains down mass celestial bombardment on every object in both systems, particularly when the Reconvergence reaches its critical vertex of transversion.\n\nAdditionally, the Sirian Solar Reconvergence would completely explain why the planet Venus spins clockwise and backwards (opposite to the spin of the other planets) while revolving around the Sun counter-clockwise, thus creating the unusual phenomenon of one day being one year, because it completes one revolution in one year.  Clearly this is an indication that Venus was originally a planet torn out of its clockwise orbit in the clockwise Sirian System during one of the Reconvergence, and was captured by our Sun.\n\nThe reason why the two systems are locked in this process is because they were formerly unified as one solar system; our system was originally the Osirian Trinary Stellar System.  Sirius B is our original paternal star, Sirius A was the outer star that orbited the body of the system, our Sun (Sol) was technically Sirius C, originally a binary companion with Sirius B at the core of our former Trinary System, and there were originally a total of eleven planets.  The split occurred because Sirius B after depleting its helium as a Red Giant exploded into a Nebula Discontinuity Event, creating the Local Compression Bubble and precipitating the celestial dynamics that tore the system in half.  The two halves journey off to their greatest distance, and then invert and return to the path around the galactic center that they were originally blown apart from, being the recyclic event of the Sirian-Solar Reconvergence.  This cosmocataclysm wipes all human civilization off the face of the Earth and catapults Mankind back to a State of Neobarbarism to begin the slow and incremental process of re-civilization all over again.  It is also responsible for suddenly laying down the Geological Column and entombing the charred bones of beasts and men into fossilization within the stratification, because the event is so violent, catapulting the Earth out of its orbit and thrusting the oceanic waters out of their basins, overrunning the continents.\n\nAs our Solar System and the Sirian System near ever closer, signs of the next Sirian-Solar Reconvergence are mounting, being the environmental deterioration of the terrestrial environment, increased volcanism on the oceanic floors that is heating up the seas and affecting the climatic temperatures, the melting of Earth’s and Mars’s polar ice caps, new red spot storms on Jupiter, the addition of a third belt to the Van Allen Radiation Belts that surround the Earth, the vio
485969
There are lots of different types of stars, all with different 'lifespans'. Ours is about 4.5 Billion years old and should 'live' to the ripe old age of about 10 Billion years old.
216942
Our sun is indeed a star. As a star,it will go through all the phases that other stars go through like BIG BANG and etc. Yes,our sun will explode one day and that day will be in another million or billion years of time. So,don't worry about it now. Worry about your great grandchildren. Anyway i hope that i had answered your question. Take care.
567695
in actual fact the SUN is a star. The other STAR/STARS are not called sun because they are extremely far from us and have no quite any uses to us but the sun id use ful to us by providing heat. So i guess the people are trying to make the SUN a special star by giving it a different name.\nlol...
284410
No.\nI am immersed in the re-release of 'Cosmos', the Carl Sagan tour of Life, the Universe and et cetera.\nThe stars are distant suns or galaxies, in some cases.\nScientists have taken readings indicating that everything is flying away from us at immense speeds.  We might think we are the center of the universe, but we are near the edge of just one smaller galaxy.\nRemember, in an explosion, the outer material flings away at a high rate of speed, and that near the center at a slower rate.  The 'ball of dirt' in the medium range assumes that everything is flying away from it.  And promptly begins judging amateur singers.
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Below is a link to an article entitle "TWIN SOUL (TWIN FLAME) RELATIONSHIPS":\n\nhttp://star.goddess.tripod.com/twinflame2.html
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Look up "the nebular hypothesis".  you also are confusing the Milky Way (a disk shaped system of a hundred billion stars or so of which our sun is a part) and the Solar System (our sun and its surrounding planets and other assorted detritus.)\n\nhttp://en.wikipedia.org/wiki/Solar_nebula
511230
Our sun was ALWAYS a star. It didn't just evolve into one.
543897
well, ur stars may have a match with pisces ppl\nalass i m not a pisces
703897
Actually, most stars are binary. Most clusters of three or more stars is a relatively short-lived (cosmologically speaking) association that usually deteriorates to binary systems. When the cluster "sheds" its extra companions, these extra companions will either pair up with another single, if sufficient gravitated to each other, or in less frequent case, remain a single star.\n\nThe size of any star is determined by several factors, such as availability and composition of the nebula from which it is formed, any other forces, or field, that may exist in the nebula, etc.\n\nThe super giant is usually the shortest-lived star. Its life span has to do with the rate of fusion within the star and that is dependent upon the surface area as opposed to the volume of the star.
145689
*Poking lordfarhad.rahimi* Please only post a question once...\n\nFar as the universe being unsteady, yes of course it is. That is the nature of the universe, it is not a steady, static thing. It changes and is chaotic. That is part of the beauty of our universe.\n\nNow, as to stars collapsing. Yes indeed they do, that is part of the life cycle.\n\nStars are born in nebulae. Huge clouds of dust and gas collapse under gravitational forces, forming protostars. These young stars undergo further collapse, forming main sequence stars.\n\nStars expand as they grow old. As the core runs out of hydrogen and then helium, the core contacts and the outer layers expand, cool, and become less bright. This is a red giant or a red super giant (depending on the initial mass of the star). It will eventually collapse and explode. Its fate is determined by the original mass of the star; it will become either a black dwarf, neutron star, or black hole.\n\nOur own sun will become a black dwarf in a few billion years...\n\nOn a side note, the universe itself is not collapsing, never fear. It is expanding and getting larger all the time.\n\nI've added some links that have great diagrams of this fascinating topic below.
527742
The sun is a star.  All stars eventually burn out.  See facts below:\n\nThe Sun will last about 5 billion years as it is now, a so called Main Sequence Star, and burns 700 billion tonnes a second. This may look like a lot but the Sun actually burns Hydrogen, a gas, and it turns it into Helium, another gas. This happens in the central part of the Sun, its Core, through a process called nuclear fusion. A side effect of fusion is that light and heat are created. So only a small amount of this Hydrogen, only a few Billion tonnes a second, is actually burned off to create light. I would not worry that so much Hydrogen is burnt every second as the sun has a mass of 1.989 times 1030Kg. That is 1,989,000,000,000,000,000,000,000,000,000,000 Kg, or one million nine thousand, eight hundred and nine billion, billion, billion Kg. So the odd few Billion tonnes will not be missed. \n\nWhat is really interesting is what happens after the Hydrogen has been used up in the Suns core. At this point in our Sun's life the central part of the Sun, its core, shrinks and heats up and its atmosphere will expand to cover the Earth, and possibly Mars. The Sun is now called a Red Giant Star. If you can find the constellation Orion, the bright red star in the upper left hand corner is a Red Giant called Betelgeuse. After only a few million years the core will shrink again and the our Suns atmosphere will be blown off into space to become Planetary Nebulae. What will be left is a type of Star called a White Dwarf. This will last for many tens of billions of years, slowly cooling and getting dimmer. So, our star, the Sun, will last for 5 Billion years as it is, a few million years as a Red Giant, and finally tens of Billions of Years as a White Dwarf.