bakaneko regarding fire fire in its different colours shows its degree of hotness right? so red is coldest of the fires blue then white? So I was wondering do blue and white fires burn in oxygen like red fire?... so.. if that is so how do stars in space which are balls of .. somethings burn? they're red blue and white too that sort of range right? is there such a thing as yellow fire? o.o Akagi Ritsuko Fire has different colors depending on what is burning, as well as the temperature and intensity of the flame. For instance, if you burn copper in a normal atmosphere, you get a green flame. Hydrogen burns a deep red, while natural gas burns blue, while still other flames are in the ultraviolet and are basically invisible. A more intense flame that is consuming more material and getting fed more oxygen will burn brighter, but that does not necessarily mean that it is hotter. Your typical wood fire is "yellowish" due to the fact that it is hot and bright. However, if you really want yellow, then the best bet would be sodium, which burns at that same golden color as those deep yellow sodium vapor lights that you can find along city streets and public venues. Akagi Ritsuko Stars are not "burning" in the normal sense of that word. When you say "burn" you typically mean that something is exothermically oxidizing. (Combining with oxygen in a chemical reaction that releases heat. For example, the carbon in the wood is oxidized into carbon dioxide - CO2.) A star, on the other hand, has a thermonuclear fusion reaction occurring at its core. Chemical reactions involve the transfer or sharing of electrons to recombine atoms into different molecules (but the atoms are unchanged). Fusion involves the combining of atomic nuclei, transmuting them into heavier nuclei, which releases orders of magnitude more energy. Typically, stars fuse Hydrogen into Helium. But the "heavier" nuclei can also fuse. In a star like our sun, most nuclei up to Iron can be formed and found. You cannot actually "see" the fusion reaction occurring many thousands of miles below the surface of the star at a temperature in the millions of degrees. The energy released does eventually percolate through the star's outer layers reach the surface, where it can be released. This makes the surface of the star far, far cooler. Our sun may have a core that is in the millions of degrees, but its surface is only on the order of 6000 degrees Fahrenheit. It puts out a wide spectrum of light, from the thermal infrared all the way into the far ultraviolet, but its peak is roughly around the middle, yellow portion of the visible spectrum, so we refer to it as a "yellow" star. Older, cooler stars appear red while, younger, hotter stars appear blue, because their higher temperature releases light shifted to the higher energy end of the spectrum.