what is the age of sun?
610011
5,000,000,000 years, more or less
545487
The sun has lived for a long time actually the sun isn't alive but anyway stars usually live for a bout ten billion years.  they know this by looking at the history of other stars and how much they have gone out in the short amount of time  it was being studied. The sun is burning its hydrogen gas so its not a really accurate guess but its pretty close. but you wont have to worry about the sun burning out because you will already be dead for a long time.
432119
It takes about 365.2422 days to orbit the sun (i.e. a solar year). If we have a year be 366 days every four years, that averages out to 365.25 daysper year. This is still a bit large, so we declare 3 of the four century marks to *not* be leap years. That then gives an average of 365.2425, which is close enough for most purposes.\n\nSpecifics: Every year that is divisible by 4 is a leap year *except* those ending in 00. These are leap years only if divisible by 400.
944948
It is estimated by astrophysicists that the sun will continue to turn hydrogen into helium for the next 4 to 5 billion years, so there's not much to worry about in that sense.\n\nThe problem is the sun is getting hotter, and we are located in a perfect temperature region which is unfortunately shifting out towards mars which will result in the earth burning up. This is a gradual change expected to take full effect in about 500 million years (not long on the large scale of things.)\n\nBy the way the sun is also regarded as being middle aged!
460461
A) Galaxy, about 100,000 years.\n\nB) Sun, about 5 seconds\n\nC) Solar System, it depends on if you mean the orbit of Pluto or all the way out to the Oort cloud.
659001
Sun has finished its half of age and after some billions of years its gonna die. In the same way earth will be getting cooler it is gonna die.\n\nSun is a star. It will become a red supergiant. It's size will increase tremendously and it will gulp down mercury and venus. The temperature on earth will be unbelievable. Then it will become supernova and then there are three chances for sun to become 1. nebula  2. Neutron star or the worst nightmare 3. black hole.\n\nAbout dying here this one too. If the night sky is clear and with your naked eyes if u see in the right direction u can see andromeda galaxy - which is light years away. It is said that billions of billions of billions of years after...one day milky way (our galaxy) and andromeda will clash\n\nOr else talking about earth if not after billions of years when earth will die may be a little earlier ya earlier than sun becoming the red supergiant...the life especially human life may be in a serious danger. The threat is of asteroid impacts in 2014 or 2029 or 2880 or adverse climatic change in 2100 or another ice age!\n\nThere is a theory of Wormholes. Through these we can travel from one point of the universe to the other with a speed more than or equal to that of light. May be then we will be able to go somewhere.
289825
Our sun does not have enough mass or density to go nova.\n\n"The Sun is about 4.5 billion years old. it has used up about half of its nuclear fuel (hydrogen). In about 5 billion years from now, the sun will begin to die.\n\nAs the Sun grows old, it will expand. As the core runs out of hydrogen and then helium, the core will contact and the outer layers will expand, cool, and become less bright. It will become a red giant star.\n\nAfter this phase, the outer layers of the Sun will continue to expand. As this happens, the core will contract; the helium atoms in the core will fuse together, forming carbon atoms and releasing energy. The core will then be stable since the carbon atoms are not further compressible.\n\nThen the outer layers of the Sun drift off into space, forming a planetary nebula (a planetary nebula has nothing to do with planets), exposing the core.\n\nMost of its mass will go to the nebula. The remaining Sun will cool and shrink; it will eventually be only a few thousand miles in diameter!\n\nThe star is now a white dwarf, a stable star with no nuclear fuel. It radiates its left-over heat for billions of years. When its heat is all dispersed, it will be a cold, dark black dwarf - essentially a dead star (perhaps replete with diamonds, highly compressed carbon)."\n\n---and---\n\n"Our star, the sun, was born in the heavens about 4.5 billion years ago. Our sun is about 1/3 of the way through its expected life. Scientists are now predicting the following events during the remaining life of our star:\n\n    * In the next 1.1 billion years, its brightness will increase by 10%. This will super-heat our planet as a result of a severe greenhouse effect. All of the oceans on earth will boil away and all life will be destroyed.\n\n    * In about 6.5 billion years, our sun will double in brightness and use up all of its supply of hydrogen fuel in its core. This will cause the sun to begin swelling as it uses hydrogen from the layers surrounding the core.\n\n    * In about 8 billion years the sun will swell to 166 times its present size. This giant star will swallow up Mercury, Venus, and maybe even our Earth. Our sun will then be what scientists call a Red Giant because it will be very large and red in color.\n\n    * After all hydrogen fuel is used, the sun will begin to use helium as its fuel. This fuel will burn very quickly and only last about 100 million years.\n\n    * In about 12 billion years, the sun will eject much of its outer layers and become a smoldering, collapsed core that scientists would call a White Dwarf."
1140436
The earth moves around the sun at a mean distance of 93,000,000 miles.\nAnother point of interest, the earth is more than 4500 million years old.
891052
It requires a bit more than classical physics, but still, you can estimate the sun's lifetime from a very simple calculation. \n\nFirst of all, if you want the current age of the sun (around 5 billion years) this number is determined from radioactive dating of objects in the solar system which are known to have formed around the same time as the sun, as stated in the answer to a previous question. \n\nThe total lifetime of the sun before it becomes a red giant is, as you say, around 10 billion years (meaning that the transition will occur around 5 billion years from now). This can be estimated by assuming that the sun will "die" when it runs out of energy to keep it shining. The time for this to occur is roughly the total energy the sun has that can be turned into light, divided by the rate at which the sun is giving off energy, or: \n\nlifetime = (energy) / (rate [energy/time] at which sun emits energy) \n\nThe rate at which the sun emits energy (its luminosity) is around 3.8 x 1026 Watts (that's the number 38 followed by 25 zeroes - quite a lot of lightbulbs!). This number can be determined from measurements of how bright the sun appears from Earth as well as its distance from us. \n\nThe total energy that the sun has to burn requires a little extra knowledge (for example, some nuclear physics) to understand. We know that the sun shines via nuclear reactions in the core that transform four hyrogen atoms into one helium atom. If you look at a periodic table, you will see that one helium atom has a little less mass than four hydrogen atoms combined; about 0.7% of the original mass has "disappeared". This "missing mass" gets transformed into energy, and this is the energy that causes the sun to shine. Therefore, using Einstein's famous formula E=mc2 for the conversion between mass and energy we have that the available energy in the sun is: \n\nE = 0.007 x M c2 \n\nwhere c is the speed of light and M is the amount of mass in the sun that is capable of undergoing the above nuclear reactions. \n\nNow, it turns out that only the central part of the sun is at a high enough temperature to actually undergo these reactions. You would need to use a detailed model of the sun's structure to figure out exactly how much of the sun is at a high enough temperature, but if we're just estimating things we can say that on the order of 10% of the sun's mass is in the central part of the sun where it is hot enough to undergo nuclear reactions. We then have: \n\nE = 0.007 x 0.1 x Msun c2 \n\nwhere Msun is the total mass of the sun, 2 x 1030 kilograms. We therefore can calculate that the total energy the sun has to burn is around 1.3 x 1044 Joules. Dividing 3.8 x 1026 Watts (the rate at which the sun is giving off energy) into this number gives an approximate value of 10 billion years for the sun's lifetime.
493064
The core temperature of the sun is:\n15,600,000 K.\n\n[Just for information: Surface temperature is: 5800 K]
396602
4.5 billion years old maybe http://www.talkorigins.org/faqs/faq-age-of-earth.html
895944
Fact 1: The sun was discovered 35,007 years ago.\nFact 2: It was discovered by Carl Sagan.\nFact 3: Using his eyes.
61902
Earth is thought to be between 4.5 and 4.8 billion years old. The age of Earth is found by measuring the age of very old Earth rocks. This is done by measuring the rate at which elements of the radioactive metal uranium decay (break down) into lead. Scientists have also measured the age of meteorites which have fallen onto Earth's surface, and the age of moon rocks brought back by the Apollo astronauts. Both the meteorites and the moon formed around the same time as Earth, and they show similar ages.\n\nIf you want a break down of that timespan in terms of Geologic Periods, see:\nhttp://www.cotf.edu/ete/modules/msese/earthsysflr/geotime.html
334251
The sun is not a planet.
950874
A complete orbit round the sun = A year...\nSo for me i am 18, so its 18 complete orbits... thats year 1988...\nSo if a person is born in 1987 before today, that will be 19 complete orbits. however, if you 1987 after today, thats 18 cos its still not your birthday yet!\n\nin simpler words, your age = number or complete orbits!
608831
Don't want to cut and paste it all, but you can find that information on Wikipedia in the third section down "Age and origin of the solar system"\n\nLink: http://en.wikipedia.org/wiki/Solar_system\n\n(Or you can just wait a few minutes until someone else cuts & pastes the whole thing.\n\nSome other good sources:\nhttp://www.nineplanets.org/origin.html\nhttp://www.enchantedlearning.com/subjects/astronomy/solarsystem/origins.shtml\nhttp://www.britannica.com/eb/article-27552
728755
The Sun's current age, determined using computer models of stellar evolution and nucleocosmochronology, is thought to be about 4.57 billion years.[4]\n\nThe Sun is about halfway through its main-sequence evolution, during which nuclear fusion reactions in its core fuse hydrogen into helium. Each second, more than 4 million tonnes of matter are converted into energy within the Sun's core, producing neutrinos and solar radiation. The Sun will spend a total of approximately 10 billion years as a main sequence star.\n\nThe Sun does not have enough mass to explode as a supernova. Instead, in 4-5 billion years, it will enter a red giant phase, its outer layers expanding as the hydrogen fuel in the core is consumed and the core contracts and heats up. Helium fusion will begin when the core temperature reaches about 3×108 K. While it is likely that the expansion of the outer layers of the Sun will reach the current position of Earth's orbit, recent research suggests that mass lost from the Sun earlier in its red giant phase will cause the Earth's orbit to move further out, preventing it from being engulfed. However, Earth's water and most of the atmosphere will be boiled away.\n\nFollowing the red giant phase, intense thermal pulsations will cause the Sun to throw off its outer layers, forming a planetary nebula. The only object that remains after the outer layers are ejected is the extremely hot stellar core, which will slowly cool and fade as a white dwarf over many billions of years. This stellar evolution scenario is typical of low- to medium-mass stars.[5][6]