Biggest star in universe

To the naked eye, the stars in the night sky all look very similar to each other, the main difference between them being that some are brighter than others. But if you look more carefully, you’ll see that stars come in different colors. Most of them look white, but some are distinctly red in color while others are blue. A star's color tells us about its temperature and mass, and blue stars are the hottest and most massive of all. Any star that has three or more times as much mass as the sun will tend to look blue to our eyes. That's irrespective of other factors such as chemical composition; blue stars, yellow stars and red stars alike are made up of around 75% hydrogen, 24% helium and smaller amounts of other elements. But the fact that blue stars are more massive means they generally have higher intrinsic luminosities than other stars. This means they can be a long way away and still remain visible in the sky. Related: Why are blue stars so hot? Blue stars are blue because they're very hot. This sounds wrong, because in the everyday world — for example on weather maps — red means hot and blue means cold. But blue light carries more energy than red light, which means it needs a hotter radiation source to produce it. This explains why blue stars are hotter than red stars, and also has a down-to-earth consequence if you've ever seen metal being heated up in a forge. First, it glows red, then as it gets hotter it turns blue-white. The high temperature of blue stars, coupled ...

• Afrikaans • العربية • Asturianu • Azərbaycanca • Башҡортса • Български • Boarisch • Brezhoneg • Čeština • Deutsch • Español • فارسی • Français • Galego • 한국어 • Հայերեն • Bahasa Indonesia • Italiano • Lëtzebuergesch • Македонски • मराठी • مصرى • Nederlands • 日本語 • Polski • Português • Română • Русский • Simple English • Slovenčina • Српски / srpski • Suomi • Татарча / tatarça • ไทย • Türkçe • Українська • Tiếng Việt • 中文 • • • • • • Below are lists of the largest stars currently known, ordered by The angular diameters of stars can be measured directly using Uncertainties remain with the membership and order of the lists, especially when deriving various parameters used in calculations, such as stellar All the sizes stated in these lists have inaccuracies and may be disputed. The lists are still a work in progress and parameters are prone to change. Caveats Various issues exist in determining accurate radii of the largest stars, which in many cases do display significant errors. The following lists are generally based on various considerations or assumptions; these include: • Stellar radii or diameters are usually derived only approximately using the • • Many supergiant stars have extended atmospheres, and many are within opaque dust shells, making their true effective temperatures and surfaces highly uncertain. [ citation needed] • Many extended supergiant atmospheres also significantly change in size over time, regularly or irregularly pulsating over several months or ye...

The biggest star in the universe is UY Scuti, a red supergiant star that is estimated to be over 1,700 times larger than our Sun. It is located in the constellation Scutum and has a diameter of approximately 2.4 billion kilometers. UY Scuti’s size is due to its massive core, rapid expansion, and short lifespan. By studying stars like UY Scuti, astronomers can learn about the properties and behavior of these massive objects, and gain a better understanding of the universe as a whole. A zoomed-in picture of the luminous red supergiant star UY Scuti. ( The Biggest Star in the Universe As an In this article, we’ll take a closer look at UY Scuti and explore what makes it so massive, how astronomers study stars like it, and what its existence can teach us about One of the most remarkable things about UY Scuti is its sheer size. With a diameter of approximately 2.4 billion kilometers, UY Scuti is so large that it’s difficult to even comprehend. To put it in perspective, if UY Scuti were placed in the center of our solar system, its outer layers would extend all the way out to the orbit of In the amazing illustration below, you can see just how massive UY Scuti is. Comparison of UY Scuti to other stars (Sun, Sirius, Pollux, Arcturus) by S. Clester ( So how do astronomers study stars like UY Scuti, which are located millions of light-years away from us? One of the most important tools we have is Another key tool for studying stars like UY Scuti is computer modeling. Using Despite o...