why do say the sun is the source of all the engry here on earth?
602571
The sun is not the source of ALL the energy - just almost all of it.  \n\nLight is a form of energy, most of our light is from the sun but we do recieve a tiny fraction of light from the other stars in the sky - that is why we can see them.\n\nBut the sun does supply almost all the energy.\nThe sun radiates light and other forms of energy which hits the earth and some is absorbed (some is also reflected).  Much of the absorbed light becomes heat - this is why it is hotter in the sunshine than the shade.\nSunlight also allows plants to obtain energy by a process called photosynthasis which happens in leaves and green stalks (like on a cactus).  It is this energy from sunlight which allows plants to grow.  All living things use this energy from plants via the food chain.\nFuels (like coal and oil) come from the remains of plants and animals and thus the energy was originally from the sun.\n\nThere are sources of energy which don't come from the sun such as geothermal power (this is heat from the centre of the earth which is created by pressure) and there are even organisms which live deep in the ocean which do not need any sunlight to survive (they are chemotrophic bacteria which survive around active volcanic vents in the sea floor).  \nBut to all intents and purposes a good 99% of all the energy comes from the sun.\n\nI hope this helps you with your homework!
878490
Because the Moon is round and the Sun is the only source of light in our solar system - only half of it can be illuminated at one time.  But sometimes the side we don't see it lit up - when we have a new Moon.
491191
The Sun rises and sets where it does because of the Earth spinning, the Earth spins and the Sun comes into view from where we stand from what we term the East, it doesn't literally rise anywhere.
948421
The Sun is the most prominent feature in our solar system. It is the largest object and contains approximately 98% of the total solar system mass. One hundred and nine Earths would be required to fit across the Sun's disk, and its interior could hold over 1.3 million Earths. The Sun's outer visible layer is called the photosphere and has a temperature of 6,000°C (11,000°F). This layer has a mottled appearance due to the turbulent eruptions of energy at the surface. \nSolar energy is created deep within the core of the Sun. It is here that the temperature (15,000,000° C; 27,000,000° F) and pressure (340 billion times Earth's air pressure at sea level) is so intense that nuclear reactions take place. This reaction causes four protons or hydrogen nuclei to fuse together to form one alpha particle or helium nucleus. The alpha particle is about .7 percent less massive than the four protons. The difference in mass is expelled as energy and is carried to the surface of the Sun, through a process known as convection, where it is released as light and heat. Energy generated in the Sun's core takes a million years to reach its surface. Every second 700 million tons of hydrogen are converted into helium ashes. In the process 5 million tons of pure energy is released; therefore, as time goes on the Sun is becoming lighter. \n\n \n\nThe chromosphere is above the photosphere. Solar energy passes through this region on its way out from the center of the Sun. Faculae and flares arise in the chromosphere. Faculae are bright luminous hydrogen clouds which form above regions where sunspots are about to form. Flares are bright filaments of hot gas emerging from sunspot regions. Sunspots are dark depressions on the photosphere with a typical temperature of 4,000°C (7,000°F). \n\nThe corona is the outer part of the Sun's atmosphere. It is in this region that prominences appears. Prominences are immense clouds of glowing gas that erupt from the upper chromosphere. The outer region of the corona stretches far into space and consists of particles traveling slowly away from the Sun. The corona can only be seen during total solar eclipses. (See Solar Eclipse Image). \n\nThe Sun appears to have been active for 4.6 billion years and has enough fuel to go on for another five billion years or so. At the end of its life, the Sun will start to fuse helium into heavier elements and begin to swell up, ultimately growing so large that it will swallow the Earth. After a billion years as a red giant, it will suddenly collapse into a white dwarf -- the final end product of a star like ours. It may take a trillion years to cool off completely. \n\n\nSun Statistics \nMass (kg) 1.989e+30 \nMass (Earth = 1) 332,830 \nEquatorial radius (km) 695,000 \nEquatorial radius (Earth = 1) 108.97 \nMean density (gm/cm^3) 1.410 \nRotational period (days) 25-36* \nEscape velocity (km/sec) 618.02 \nLuminosity (ergs/sec) 3.827e33 \nMagnitude (Vo) -26.8 \nMean surface temperature 6,000°C \nAge (billion years) 4.5 \nPrincipal chemistry \nHydrogen\nHelium\nOxygen \nCarbon\nNitrogen\nNeon\nIron\nSilicon\nMagnesium\nSulfur\nAll others  \n92.1%\n7.8%\n0.061%\n0.030%\n0.0084%\n0.0076%\n0.0037%\n0.0031%\n0.0024%\n0.0015%\n0.0015% \n\n* The Sun's period of rotation at the surface varies from approximately 25 days at the equator to 36 days at the poles. Deep down, below the convective zone, everything appears to rotate with a period of 27 days. \n\n\nEclipse & Sun Movies\n\nSOHO - Halo Mass Ejection Event. \nSOHO - Halo Mass Ejection Event - Zoomed Out. \nSOHO - Explosive Coronal Mass Ejections from the Sun. \nSOHO-6 Comet at 2-6 solar radii from the Sun. \nSolar Magnetic Field Map \nMan's Fascination of the Sun. \nThe Sun's interior, photosphere, and corona. \nSun's magnetic field, prominences, solar wind, aurora. \nCorona Animation of Solar Prominences. \n1993-1994 animation of the Sun as seen in soft x-rays. \n1994 Eclipse. \nA QuickTime movie (15
1073200
Surprising so many answers.  If you start in Genis you find that it does not mention others of any account until it comes to man.  It has God calling things into formation.  There must have been a goodly number moving things and mixing things as the heavens and the earth were created.  With earth there was the additional processes of creating plants and animals.\n\n"THEY" were so impressed, they said "Let us create man in our image!"  And so God created man in his likeness.  \n\nSo when God demanded there be light, I am sure the others that looked like him did what they needed to to create light and keep the boss happy.\n\nRead Genis-pretty plain writing no need for an expert to explain the basic story, but plenty of room for kids to ask how and why.
568567
Your teacher.\n\nThe sun is the center of our solar system (thus the terminology), and all of the planets circle around the sun.\n\nJust to clarify on one point...The sun is not the center of the universe.  It is the center of our solar system.  There are thousands of solar systems in our universe, and our sun is not at the center of these.
387463
This question could be interpretted two different ways: (1) What drives the sun to produce heat/enegery? and (2) Describe the process of using the solar energy to power modern conventions.\n\nSomebody else already attempted the latter, so I'll go for #1.\n\nThe sun, right now, is fusing hydrogen into helium to produce its energy.  It's been doing this for a long time, and will continue to do so until it runs out of hydrogen.  When this happens, it'll start fusing the helium, and so on.\n\nHope this helps.
1026596
BECAUSE LOOK AROUND. HE CREATED ALL THE THINGS ON THE EARTH. THE TREES, FLOWERS GRASS, ANIMALS AND EVEN YOU AND ME. AND EVERYBODY ON THIS EARTH.
365915
The sun is the earth's largest source of reliable energy.  Plants have green leaves that absorb and trap sunlight and convert that light into chemical energy; namely starches that other animals eat.\n\nThe sunlight is converted to starches by chlorophyll, a green substance in the leaves of green plants.  Carbon dioxide gas molecules (CO2) in our atmosphere is combined into sugar; sugar is combined into starches.  Wood is a form of starch called cellulose.\n\nSecondly, water is "split" (chopped into three pieces) releasing oxygen (gas) by photosynthesis.  So plants provide us oxygen by "splitting" water; and plants provide us sugar by "fixing" carbon dioxide.  We eat the plants or we animals that eat the plants.  This is how we get our energy.\n\nSo, cows are animals that eat grass; in so doing they gather sugar energy and live.  We eat cows, for example.  Or, certain insects eat plants; some fish eat those insects and then we eat the fish...so on and so forth.
184521
Quran states Dhul-Qarneyn saw sun setting in a muddy spring, meaning there was a large spring with unclear water where the sun was setting. \n\nDoesn't teachers teach that sun rises in east and sets in the west. Is it because the teachers do not know science or is it because that is how people on earth observe it ?\n\nScientific knowledge of early muslims may not be correct like many early people. but this verse has nothing unscientic but it is an expression to say sun rises and sun sets\n\nRegarding the second verse 36:38 you mentioned, we all know Sun along with the solar system is not stationary but they also moves along an orbit, when and where this orbiting stops God only knows. So resting place refers to final destination of Sun when World ends. Quran uses the word 'Swim' to refer to motion of sun and moon, indicating rotation and also revolution\n\nNow what about science in bible ? \nSee Joshua 10 : 12,13.\nhttp://cgi.godsview.com/cgi-bin/rcdenig/kjvread.pl?book=6&chapter=10\nIt is stated that Sun was stopped in the sky to prolong the day, so that enemies could be avenged. If bible is scientifically correct, isn't it the rotation of earth that has to be stopped to prolong the day ?
42472
The answer to this questions lies in what the sun is made out of and how that reacts to itself.  The sun is plasma, as are most of the stars.  The mass of the sun is so great that it possesses tremendous gravitational force.  This causes all the pasma to be pulled toward the center of the sun.  There is too much plasma there for it all to be at the center of the sun, so it gets positioned around the center in the shape of a ball.  Take a magnet for example.  If you place a magnet in the middle of a bunch of iron filings, the filings will all attempt to reach the magnet.  They will not all be able to do so, so the rest will be distributed around the middle in a ball.  This is what happens in the sun, just like the earth, the moon, and all other celestial bodies.  In the earth, the sand and dirk particles are pulled toward the center and are thus arranged in a ball around the middle of the earth because of gravity.\nThe sun is not a perfect ball, but then, neither is the earth, yet it looks like one from the moon's perspective.  The reason for this is also due to distance.  The sun is approximately 93,000,000 miles away.  It looks about 5 cm in diameter from earth.  It is actually 1,390,000 KM in diameter.  This causes the sun to look only about .000000003597th of it's size.  If the sun happens to have a bump opn one size that it oh, let's say, 100,000 KM in diameter, it would only appear to be 3 millimeters in diameter from earth.  There is one other thing that keeps us from noticing it.  If I were to shine a spotlight right in your eyes, there would be no way for you to tell if the spotlight was actually a perfect circle or slightly oval.  If you don't believe me, just try it sometime.  That is what it is like, looking at the sun.  The sun is the spotlight and we are in it's direct beam during the day, which happens to be the only time we can observe it.  For all these reasons, the sun appears to be a ball.
373960
This has been pretty well answered but I thought I'd clarify.\n\nThe Sun is the name of our solar system's star, the star we call home.  (Similarly the Moon is technically the name of Earth's only natural satellite, other planets have natural satellites which we commonly call "moons").  Other stars have different names (like Vega).\n\nWe are just finding extrasolar planets (planets that orbit other stars) and it is likely that there are many stars out there with planets and even solar systems (more than one planet orbiting them).  However it is also very likely that many stars will not have any planets at all.\n\nIf you are interested in this, here is a fun website about extrasolar planets: http://planetquest.jpl.nasa.gov/index.cfm
419301
The sun is actually made up of hydrogen gas. The "burning" you speak of is the fusion of hydrogen in to helium, which emits extreme amounts of light and energy.
300263
Our sun began forming within an immense interstellar cloud of drifting gas and dust. Inside this cloud (called a 'nebula') were regions of relatively high density where gravity began drawing together bits and pieces of the gas and dust. Over several million years, this spherical region became denser and denser which caused its central temperature to rise. Finally, some 4.5-billion years ago, the temperature was hot enough to start nuclear fusion. Our sun was born.\n\nGod should be spelled B-I-G B-A-N-G\nPBrax@netscape.com
1162718
Because the sun does rise in the east and set in the west.  \n\nWe do know now that the reason is not because the sun is revolving around the earth, but because the earth spins on its axis.
279373
It contains 99.9% of the mass of the solar system. \nall energy for life comes from the sun in our solar system.
1160922
Just about all of your questions are addressed at the source below.\n\nTo me, you just seem to be trolling. If you read the article, it gives possible explanations under "Theoretical problems".\n\nYou're not some miracle thinker who's "thinking outside the box." Solar astronomers know what they're talking about. They don't just say, "Oh! Gee! We were totally owned by this Yahoo! kid!" Please. They're also okay not knowing things. That's why they study: to figure things out.\n\nBut I suppose you think the sun is really powered by an alien civilization's equivalent to a battery, and by controlling solar wind they were able to cause 9/11. Right?