how much bigger is betelgeuse than the sun?
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Size comparison: Betelgeuse and the Sun. This image, made with the Atacama Large Millimeter/submillimeter Array (ALMA), shows the red supergiant Betelgeuse — one of the largest stars known. In the millimeter continuum the star is around 1400 times larger than our Sun.
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Eris is one of the largest known dwarf planets in our solar system. It's about the same size as Pluto, but is three times farther from the Sun. Eris first appeared to be larger than Pluto.
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The Sun is 864,400 miles (1,391,000 kilometers) across. This is about 109 times the diameter of Earth. The Sun weighs about 333,000 times as much as Earth. It is so large that about 1,300,000 planet Earths can fit inside of it.
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So by diameter Sun is 277 times larger than mercury.
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Eris is one of the largest known dwarf planets in our solar system. It's about the same size as Pluto, but is three times farther from the Sun.
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In terms of surface area, Jupiter is 121.9 times bigger than the Earth. That's how many Earths could be flattened out to cover the surface of Jupiter. Jupiter has 317.8 times the mass of the Earth.
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(In case you're wondering, though, Mercury is still significantly larger than the dwarf planet Pluto: Pluto's equatorial diameter is just 2,302 km, about half Mercury's width.)
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Jupiter is 300 times bigger than Earth. The Kepler-88 planetary system also has 'Kepler-88 b', as per media reports. The discovery was made by a group of astronomers led by the University of Hawaii Institute for Astronomy (UH IfA).
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Explanation: To begin with planets, as that is the easiest question to answer, there are no planets bigger than the Sun or even close to the size of the Sun. ... Neutron Stars would be much smaller by volume than our sun but have more mass and much much higher density than our Sun.
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A: The biggest star size-wise is VY Canis Majoris, which is about 2,000 times wider than our sun. You can fit 9.3 billion of our suns into VY Canis Majoris.
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It is a young, hot-white star only about 8.6 light-years from Earth, and is 25 times brighter than the sun. Compare Sirius to the reddish Betelgeuse, which is the upper right shoulder of Orion, the hunter, and is just to the northwest of Sirius.
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Sirius A is about twice as massive as the Sun ( M ☉) and has an absolute visual magnitude of +1.42. It is 25 times more luminous than the Sun but has a significantly lower luminosity than other bright stars such as Canopus or Rigel.
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The sun's surface temperature is about 5,800° Kelvin (about 10,000° Fahrenheit), and Betelgeuse is roughly half that, about 3,000° Kelvin (about 5,000° Fahrenheit). That is why it is red — red stars are cooler than the sun, blue-white stars are hotter. Betelgeuse is, however, much bigger and brighter.
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Antares is about 550 light-years away from the Sun being the brightest star in the constellation of Scorpius. It is about 10.000 times brighter than the sun with a luminosity of about 60.000 times greater.
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Arcturus is roughly 25 times greater in diameter than our sun. Because of its larger size, in visible light Arcturus radiates more than 100 times the light of our sun.
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The largest known star in the universe is UY Scuti, a hypergiant with a radius around 1,700 times larger than the sun. And it's not alone in dwarfing Earth's dominant star.
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The diameter of Venus is 12,103 km, while the diameter of the Sun is 1.4 million km. In other words, the Sun is 115 times larger than Venus. You could fit about 1.5 million planets the size of Venus inside the Sun.