Why the sun is big at rising? If the distance is shorter why it is not hot?
444832
As the light from the sun enters the atmosphere, the atmosphere bends it a certain amount. Because the sun is closer to the horizon at sunrise and sunset, there is more atmosphere to bend the incoming light rays. Hence, the sun appears larger at sunrise and sunset because of atmospheric lensing.
17267
It is an optical illusion.  The sun is the same size all the time.  When it is at the horizon, you have many things to compare it to.  When it is in the middle of the sky, there is just sky....
128708
The temp on an planet is inversly proportional to the distance from the sun. i.e., nearer the planet to sun, hotter it becomes and vice-versa.\n\nThe reason for the behaviour is that with increase in distance, the sun light/heat becomes weak hence giving less heat to the planet which is far from it.\nThis is the reason why Mercury is the hottest and Pluto is the Coldest of the Nine planets of our solar system.
652224
First, in the grand scheme of things, you are not that much closer to the sun. Do this: stand up, then shuffle your feet about a half inch to the left. You didn't move much - that's about how much closer you are to the sun.\n\nSecond, while you are correct about the warm air rising and the cold air sinking, you are forgetting the main factor that affects the heat we have on Earth - the ground. It is such an amazing heat keeper and releaser. The ground will radiate heat up towards us. However, it will cool as it goes up, which makes it, you guessed it, come back down for another round of heating. \n\nThird, in general, the higher you go, the less dense the air is, which also means it can not hold much water. Therefore, there isn't much humidity to help hold and retain heat, making it feel colder.\n\nHope these answers get you on your way to answering your question!
57150
Hot topic! Woo-eee. This is one of the creationist versus non-creationist hot potatoes!\n\nHere's why, some creationists say if the sun were shrinking steadily, then a  long time ago, it might have been so big and hot as to turn the surface of the Earth into a pit of fire. So nothing would be alive, say when the Earth was a billion years old.\n\nScientists who study the Sun believe that it is a huge ball of glowing gases and matter. Gravity wants to pull all the stuff together, to shrink it. Heat from nuclear and other reactions in the center of the sun wants to blast it all away, to make it grow.\n\nThe Sun seems to have reached a temporary balance point and so it is the size that it is right now.\n\nSome observations were thought to show that the Sun was shrinking during 6 years of monitoring.\n\nOther studies show that the Sun might sometimes expand and shrink at different times. Just like a candle flame will flare up and then settle down again.\n\nThere are no mainstream scientists claiming that the Sun has been STEADILY shrinking since the beginning. They are only investigating to see what might be happening.\n\nSome astronomy research about the possibility of the Sun shrinking has been used by some groups such as the Institute for Creation Research as evidence for a young Earth. The idea being that this research agrees with their way of reading Holy Scripture. Their view is that the Earth is not very old.\n\nOther writers point out that the astronomy research about the size of the sun is interesting and important work about small-scale, and SHORT-TERM changes in stellar structure. And it may or may not have anything to add to the creation debate.\n\nMost solar research and theory shows that stars are initially formed by coalescing matter -- they shrink. But only until a balance is reached. Then over long periods of time stars might oscillate in size as different types of chemical and nuclear reactions take place. Some stars become super-giants, others zoom outward and then crush inwards to tiny sizes. \n\nThese are just theories based on mathematical models and observations of different sized suns and novas. No one knows for sure in a secular sense.
987162
The sun isn't burning. Fire is a chemical process, and it almost always involves oxygen (air), which isn't really common in space. Instead, the sun is exploding from nuclear fusion. All the fuel floats around the sun in an extremely hot plasma, kept near the core by gravity like our own air is kept near the earth. In the middle of the sun, all the plasma on top is pressing down so hard that hydrogen atoms fuse together into helium (and rarely some other stuff), causing a huge explosion and pushing everything back up and out, only to be drawn back in by their weight to do it again. Not all the hydrogen has been fused together yet (there's a heck of a lot of it there) but when it does the sun will collapse, but eventually it will squeeze everything so hard that even the helium will begin fusing together. I don't remember what happens after that, but eventually when the helium runs out the sun will collapse again, either becoming a much smaller white star that fuses something harder and heavier than hydrogen and helium or goes nova, exploding with a sudden combination all at once before gravity can pull it back together again. The sun's too small to become a black hole though, probably. We can estimate how hot the sun is on it's surface by seeing how hot it is way out here on earth, just like you can estimate that a fire in your fireplace is hot by holding your hand near it without having to actually touch it, and by using mathematical models of nuclear reactions.
491240
It's going to be difficult to tell you more than I know, but I'll give it my best shot.\n\nThe sun is big and bright and hot.  It is a giant fusion reactor creating energy by fusing atoms of matter together.  The energy is transmitted out into space as photons of light.\n\nIt is a medium sized yellow star which began making energy about 4 billion years ago and is estimated to have about 5 billion years left before its fuel begins to run out.
1136431
Should be simple.  Warm air rises because it is less dense than cool air.  Cool air rushes in to replace the rising warm air.\n\nPlug this simple formula into the complex real world of spinning globe, equitorial heat and polar regions & you get weather.
184801
about the same size as the sun, it's average in many ways.\nthe diameter of the sun is about 860,000 miles.
801586
General Characteristics of the Sun\n\nThe sun is actually a star of about medium size; it appears larger than the other stars because of its relative nearness to the earth. The earth's distance from the sun varies from 91,377,000 mi (147,053,000 km) at perihelion to 94,537,000 mi (152,138,000 km) at aphelion (see apsis). The mean distance is c.92,960,000 mi (149,591,000 km); this is taken as the astronomical unit (AU) of distance used for measuring distances within the solar system. The sun is approximately 865,400 mi (1,392,000 km) in diameter, and its volume is about 1,300,000 times that of the earth. Its mass is almost 700 times the total mass of all the bodies in the solar system and 332,000 times that of the earth. The sun's surface gravity is almost 28 times that of the earth; i.e., a body on the surface of the sun would weigh about 28 times its weight on earth. The density of the material composing the sun is about one fourth that of the earth; compared with water, the sun's average density is 1.41. At its center, the sun has a density of over 100 times that of water, a temperature of 10 to 20 million degrees Celsius, and a pressure of over 1 billion atmospheres.\n\nObservations of sunspots and studies of the solar spectrum indicate that the sun rotates on its axis from east to west; because of its gaseous nature its rate of rotation varies somewhat with latitude, the speed being greatest (a period of almost 25 days) in the equatorial region and least at the poles (a period of about 35 days). The axis of the sun is inclined at an angle of about 7° to the plane of the ecliptic.\n\nThe bright surface of the sun is called the photosphere. Its temperature is about 6,000°C. The photosphere appears darker near the edge (limb) of the sun's disk because of greater absorption of light by the sun's atmosphere in this area; this phenomenon is called limb darkening. During an eclipse of the sun the chromosphere and the corona (the outer layers of the sun's atmosphere) are observed. Also of interest is the high-speed, tenuous extension of the corona known as the solar wind.\n\nProduction of Solar Energy\n\nThe vast and continual production of solar energy cannot be attributed merely to combustion, to the gradual cooling of a hot body, to the fall of meteorites into the sun, or to gradual shrinkage with transformation of potential energy into heat (a theory proposed by Helmholtz). The theory of relativity with its implication of the equivalence of mass and energy led to the assumption that energy stored in the atoms constituting the sun's gases is constantly being released by conversion of some of the masses of the atom's nuclei during nuclear transmutations (see nuclear energy). H. A. Bethe proposed a cycle of nuclear reactions known as the carbon cycle, or CNO bi-cycle, to account for the nuclear changes. In this cycle carbon acts much as a catalyst, while hydrogen is transformed by a series of reactions into helium and large amounts of high-energy gamma radiation are released. It is now thought that the so-called proton-proton process is a more important energy source; this process begins with the collision of two protons and ends with the production of helium, while gamma radiation is released throughout.\n\nSee nucleosynthesis; stellar evolution.\n\nThe Study of the Sun\n\nBy means of the spectroscope much has been learned about the composition of the sun. There are numerous dark lines of varying widths in the solar spectrum. These were first intensively studied by Joseph Fraunhofer and are commonly known by his name. From a study of the lines the chemical composition of the sun is determined on the basis of the discovery by Kirchhoff that the dark lines correspond in position to the bright lines characteristic of the spectra produced by elements in the laboratory. The darkness of the lines in the sun's spectrum is attributed to the presence of a slightly cooler layer of gases above the phot
654750
No its not necessarily closer to the sun(visit usgs.org) and even if its closer, it may be closer by 0.000001%.What big difference does that make.Its the difference in air pressure that makes the peaks colder.The higher you go up in the earth's atmosphere,the pressure decreases.And even an object 90% closer to the sun may not be that hot.
1095651
Okay, everyone else so far is WRONG. The sun, like any well-behaved (approximate) blackbody, does absorb light which impinges upon it. A good illustration would be if the sun were part of a binary star system and it's companion star were 20x brighter. When you are positioned such that all of both stars were visible to you, things would be quite bright and you'd be wishing for some SPF 10,000. Now, if the sun moved in front if it's brighter companion (from your point of view), the total amount of light you see from the binary system would be reduced by a factor of around 20 because you would be in the SHADOW of the sun with respect to the brighter star... in other words the sun itself, although it is a light source, would be shading you from it's brighter companion because it does absorb light. I hope this helps.
530453
Aside from the obvious size difference (109 times in diameter) the sun is made up of Hydrogen and helium, while the Earth has much heavier elements, the surface of the sun is as hot as the core of the earth, and is very, very bright.\n\nEarth                   \n\nVolume___________1.08 X 10^12 Km^3       \nSurface Area_____5.1 X 10^8   Km^2       \nMass_____________5.97 X10^24  Kg         \nGravity__________9.8 m/s^2\nSurface Temp.____-88-58 degrees C       \nCore Temp._______6226.85 degrees C\nChemical makeup__98% nitrogen and Oxygen (atmos.)         \n\nSun\n\nVolume___________1.41 X 10^18 Km^3\nSurface Area_____6.09 X 10^12 Km^2\nMass_____________1.98 X 10^30 Kg\nGravity__________273.95 m/s^2\nSurface Temp.____5506 degrees C\nCore Temp._______4.99 X 10^6 C\nChemical Makeup__98% Hydrogen and Helium\n\nThe sun is 332,590 times more massive than Earth.
732650
People usually don't do the Sun to scale when they do their model. They do it smaller. And they'll use distances between planets that are not to scale for the real distances from the sun.\n\nThat's the straight answer. Use artistic license, since using scale is not practical.
55579
The sun is a giant ball of plasma constantly fusing hydrogen into helium.  It is not 'on fire', so to speak, so the lack of oxygen and the coldness of space don't effect it like a match or something.
161565
Because it has been darkest for longest at this time. Why is the high at around 6:00 pm? same reason. The sun has been at its peak for longest then.
399933
The answer is: the sun doesn't burn.  What you are thinking of is combustion, the process of combining oxygen with something to release energy (fire).  What is happening in the sun is nuclear fusion.  Two hydrogen atoms smack into each other with such force that they join together to make a helium atom.  During this process, some of the mass is turned into energy, which is heat and light.  It has nothing to do with oxygen.