can we considered the sun as a star?
461110
Yes the Sun is a star.\n\nAnd off topic...\n\nDoes anybody find excessive cutting and pasting a boor??
1029405
You've almost answered your own question:  Stars are "stationary" sources of energy (nuclear) and give off light.  Planets do not and they orbit stars.
7997
The result is there for all of us to see. The stars and other celestial objects are the result of many such nuclear reactions. The sun is a big fusion reactor. Beginning with the lightest elements like helium and hydrogen the process of fusion gives rise to heavier and heavier elements. Some times stars are overcome by their own mass and implode to become a black hole or explode as a supernova releasing enormous amounts of matter and energy into space. In comparison the worlds biggest nuclear bomb will appear like a pop-gun. Will the sun implode or explode. Luckily  - no. But over time it will swell into what is called a red giant, swallowing Mercury and Venus. But I think by the time that happens we would have colonised Mars!
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
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...
50134
Given the number of stars in our galaxy alone, its highly probably that a star like our own sun exists with satellites like our earth orbiting it.  Of course if you're looking for a name of another planet with life on it you won't find that just yet.
454185
The sun is not massive enough to supernova.  The Sun will however eventually swell into a giant that will consume all the inner planets (when the hydrogen fuel is depleted 5 billion years or so from now) and then shrink into a white dwarf star.
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.
12842
Our Sun is a star and is thus made of the same materials (in general) that the rest of the stars are.\n\nBut because of different ages and environments, there are probably no two stars that are exactly alike.
867403
The sun is made of hydrogen.
1127024
sun....its a star btw but there are stars bigger than the sun
66324
If the sun were part of a binary system, it would revolve around the barycenter of the binary system. We would be able to dected this movment by comparing the Sun's position to other nearby stars and to more distant stars. Since we don't dectect any such movement around the barycenter, that means that any such compainion star must be very very small, making the barycenter close to the sun's positon, or very far away, making the motion of the sun about the barycenter very slow. \n\nNeither of these conditions are true of any other binary star system we see, so no.
148361
Size of Star depends on how it was formed originally. I don't think it could be said precisely. U can take the size of our sun as a measure. Radies=6400kms
985287
THe SUN IS NOT BURNING. IT IS MADE UP OF MILLION OF STARS SO IT DOES NOT NEED TO BURN.
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.
193159
A star is basically a giant hydrogen bomb. It sits in space for billions of years fusing hydrogen into helium, creating loads of light and heat, among other things.\n\nA planet orbits a star, and is just a piece of matter that does not perform nuclear fusion. Some of them are rocky balls (like the Earth, or Mars), while some of them are giant balls of gas (like Jupiter, or Saturn).\n\nEDIT: fungusbrains1, planets twinkle too. They don't produce their own light, but they reflect light from the Sun. Any cosmic object whose light rays pass through the atmosphere twinkles.
619304
You asked for it! Ha ha ha ha!\n\nWhat is the sun? Read this.....\nI  INTRODUCTION \n\nSun, closest star to Earth. The Sun is a huge mass of hot, glowing gas. The strong gravitational pull of the Sun holds Earth and the other planets in the solar system in orbit. The Sun’s light and heat influence all of the objects in the solar system and allow life to exist on Earth. \n\nThe Sun is an average star—its size, age, and temperature fall in about the middle of the ranges of these properties for all stars. Astronomers believe that the Sun is about 4.6 billion years old and will keep shining for about another 7 billion years. \n\nFor humans, the Sun is beautiful and useful, but also powerful and dangerous. As Earth turns, the Sun rises over the eastern horizon in the morning, passes across the sky during the day, and sets in the west in the evening. This movement of the Sun across the sky marks the passage of time during the day (see Sundial). The Sun’s movement can produce spectacular sunrises and sunsets under the right atmospheric conditions. At night, reflected sunlight makes the Moon and planets bright in the night sky. \n\nThe Sun provides Earth with vast amounts of energy every day. The oceans and seas store this energy and help keep the temperature of Earth at a level that allows a wide variety of life to exist. Plants use the Sun’s energy to make food, and plants provide food for other organisms. The Sun’s energy also creates wind in Earth’s atmosphere. This wind can be harnessed and used to produce power.\n\nWhile it lights our day and provides energy for life, sunlight can also be harmful to people. Human skin is sensitive to ultraviolet light emitted from the Sun. Earth’s atmosphere blocks much of the harmful light, but sunlight is still strong enough to burn skin under some conditions (see Burn). Sunburn is one of the most important risk factors in the development of skin cancers, which can be fatal. Sunlight is also very harmful to human eyes. A person should never look directly at the Sun, even with sunglasses or during an eclipse. The Sun influences Earth with more than just light. Particles flowing from the Sun can disrupt Earth’s magnetic field, and these disruptions can interfere with electronic communications.\n\nII  PHYSICAL CHARACTERISTICS \n\nThe Sun is large and massive compared to the other objects in the solar system. The Sun’s radius (the distance from its center to its surface) is 695,508 km (432,169 mi), 109 times as large as Earth’s radius. If the Sun were hollow, a million Earths could fit inside it. The Sun has a mass of 1.989 × 1027 metric tons. This number is very large. Written out, it would be the digits 1989 followed by 24 zeroes. The Sun is 333,000 times as massive as Earth is. Despite its large mass, the Sun has a lower density, or mass per unit volume, than Earth. The Sun’s average density is only 1.409 g/cu cm (1.188 oz/cu in), which is a quarter of the average density of Earth.\n\nThe Sun produces an enormous amount of light. It generates 3.83 × 1026 watts of power in the form of light. In comparison, an incandescent lamp emits 60 to 100 watts of power. The temperature of the outer, visible part of the Sun is 5500°C (9900°F). \n\nFrom Earth the Sun looks small, because it is far away. Its average distance from Earth is 150 million km (93 million mi). Light from the Sun takes about eight minutes to reach Earth. This light is still strong enough when it reaches Earth, however, to damage human eyes when viewed directly. The Sun is much closer to Earth than any other star is. The Sun’s nearest stellar neighbor, Proxima Centauri (part of the triple star Alpha Centauri), is 4.3 light-years from our solar system, meaning light from Proxima Centauri takes 4.3 years to reach the Sun. The Sun is so much closer to Earth than all other stars are that the intense light of the Sun keeps us from seeing any other stars during the day.\n\nA  Importance to Earth \n\nEarth would no