Recently researchers have used a network of radio telescopes scattered around our planet to form a virtual telescope which can cover 10,000 kilometers in diameter. A blue subgiant can be around 7-12 times the sun's radius. Our sun is one of billions in the entire universe. At the very heart of the Milky Way is a region known as Sagittarius A. A yellowish-white subgiant nominally creeps at 3-4 times the sun's diamteter. "Compared to the entire lifespan of the Sun, 9,000 years is like the blink of an eye," said astrophysicist Timo Reinhold of the Max Planck Institute for Solar System Research (MPS) in Germany. In terms of size, however, the sun has a diameter of about 864,000 miles, nearly 110 … Our Sun is an average sized star: there are smaller stars and larger stars, even up to 100 times larger. Comparative planetary and stellar sizes. [enter image source here]! It is in the constellation of Ursa minor.Actually it is a triple star system but we consider the brightest polaris A. Our sun is a star, but it is not big enough to explode in a supernova, it will simply cast out its outer layers and implode. The Sun, and everything that orbits it, is located in the Milky Way galaxy. That's pretty big. The Sun is 864,400 miles (1,391,000 kilometers) across. I just received an email that included the following pictures, circulating anonymously around the Web universe. UY Scuti is just plain big, with a radius 1,700 times that of our sun Left to right: a red dwarf, the Sun, a blue dwarf, and R136a1. In fact, our sun is classified as a G2 dwarf star. Image: Wikipedia The image shows Antares’ tumultuous surface and reveals unexpected turbulence in its atmosphere, hinting at some mysterious process that is churning away violently inside the stellar mass, according to scientists. This region is known the be the home of a supermassive black hole with millions of times the mass of our own Sun. But to compare the Sun to other stars, you'll need to ask about a specific star. Our Solar System is called the Milky Way; it is a spiral galaxy and the black hole in the center is called Sagittarius A*. To put it simply, the Sun is as big as more than 1 million Earth masses put together. It is Alpha of Ursa minor.aslo known as north star. Galaxies gather in groups, clusters and super-clusters and there are billions of Galaxies in the Universe. Suns with friends. More specifically, our Sun is in a spiral arm called the Orion Spur that extends outward from the Sagittarius arm. However, it is just one of 100 billion stars in the Milky Way. read more It's so big that if you traveled at the speed of light, it would take 8 hours to go around it. "After all, our star is almost 4.6 billion years old. The largest known star that we have discovered is VY Canis Majoris; it's located in the constellation Canis Majoris. Let's go to the dead ones. The size of Earth compared to other planets and stars: this photo of the red supergiant Antares is the best ever captured of a star other than our Sun. If you look at the size of our Sun, compared to the planets in the solar system, you’d be forgiven for thinking that it’s a tad on the large side. It is thought to weigh about 4 solar masses.. A white dwarf is around 1/100th of the sun's diameter. Let’s compare the mass of our sun to a few other stars in the galaxy: Its stellar classification puts it at a Type ‘G’, also known as a yellow dwarf, which is about 15 times smaller and 60 times less heavy than an average Type ‘O’, commonly called a blue supergiant. This staggering image shows how our sun - which is so big it accounts for 99.86% of the mass in the solar system - would look next to the biggest star in the universe. Our Sun is 864,000 miles in diameter and 10,000 degrees Fahrenheit on the surface. Different types of black holes have very different masses. "Our sun is a weirdly 'quiet' star — and that's lucky for all of us". We have found stars that are 100 times bigger in diameter than our sun. Sagittarius A or Sgr A is a complex radio source at the center of the Milky Way which contains a supermassive black hole.It is located in the constellation Sagittarius, and is hidden from view at optical wavelengths by large clouds of cosmic dust in the spiral arms of the Milky Way.. The supermassive black hole at the center of the Milky Way, Sagittarius A*, is 4.3 million solar masses. More than one million planet Earths could fit inside our Sun, but compared to the monumental masses we find in the rest of the galaxy, our Sun is somewhere in the bottom half in terms of size. We begin our exploration of the Sun, which is the main source of energy for Earth's climate system, with a feeble attempt to comprehend the size scale of the Sun as compared to Earth.