With a radius the 432,687 miles and also a diameter that 864,000 miles, our beloved star, the Sun, is the best celestial object in the solar system. The an extensive size and also mass that the Sun enable it to create an tremendous amount of gravitational force that keeps the planets the the solar system in orbit about it together it travels approximately our galaxy, the Milky Way.

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In this article, we will certainly compare the dimension of the sunlight with the dimension of the planets that the solar system and also the size of the greatest stars recognized to date. We are also going to calculate the time it would take to travel roughly the sunlight using different method of transportation. Who said astronomy couldn’t be fun?


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The very very first person to have attempted to calculate the size of the sun was Aristarchus the Samos, a Greek mathematician and also astronomer native the third century. He offered the exactly geometric principles however made some slightly not correct measurements based upon observations that made from Earth, without any type of instruments. His estimate of the size of the sunlight turned the end to it is in wrong but paved the way for future attempts.

A few centuries later, we know much an ext about trigonometry and the rule of parallax. We also have accessibility to far much more advanced and an exact tools. In 2003 and also 2006, the radius of the sunlight was measured through a really high level the precision by observing the transit that Mercury in front of the sun. Scientists provided the tools onboard the Solar and Heliospheric Observatory (SoHO) to do the measurements and also confirmed that the radius of the sunlight is 432,687 miles.

You deserve to calculate the size of the sunlight from your backyard by building a tiny DIY pinhole projector. Monitor the accuse in this video: Let’s measure the Diameter the the Sun!


The current state that the solar mechanism depends on the highly complex way in which every one of the gravitational force created by numerous huge objects (planets, asteroids, moons, etc.) communicate with each other. The sun is the key powerhouse in this system due to the fact that it hold 99.8% the the complete mass the the Solar System.

The sun is so substantial that the gravitational pressure it generates is an effective enough to hold the whole solar mechanism together. Yet what would happen if the sun was smaller sized or bigger 보다 its existing size? how would this impact the solar system?

To start with, that gravitational ar would be considerably altered, resulting in a drastic readjust in the position of the planets. The circumstellar habitable region (goldilocks zone) would extend over a completely different radius around the Sun, and this would have a far-reaching impact ~ above the emergence of life top top Earth. 

If the sunlight was larger, possibly Mars would certainly still it is in a habitable planet? Or, if it was smaller, probably Venus would have actually been home to life fairly than Earth.


To totally understand the range of our sun, let’s compare its dimension to each earth of our solar system.

Mercury: The sun is 277 times larger than Mercury. 21 million Mercury-sized planets might fit inside the Sun.Venus: The sun is 115 times larger than Venus. 1.5 million Venus-sized planets might fit inside the Sun.Earth: The sun is 109 times larger than Earth. 1.3 million Earth-sized planets can fit within the Sun.Mars: The sunlight is 207 times bigger than Mars. 7 million Mars-sized planets could fit inside the Sun.Jupiter: The sun is 11 times larger than Jupiter. 1,000 Jupiter-sized planets might fit within the Sun.Saturn: The sun is 12 times larger than Saturn. 1,600 Saturn-sized planets can fit within the Sun.Neptune: The sun is 27.7 times bigger than Neptune. 21,000 Neptune-sized planets can fit inside the Sun.Uranus: The sun is 27.4 times larger than Uranus. 22,000 Uranus-sized planets might fit inside the Sun.Bonus: Pluto: The sunlight is 585 times larger than Pluto. 200 million Pluto-sized dwarf planets could fit within the Sun.
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When we compare the dimension of the sunlight to the dimension of the planets, it i do not care clear the our regional star is certainly an expensive behemoth. However, the sunlight is classified as a G-type main-sequence star, or an ext usually referred to as a “yellow dwarf star”. In reality, ours beloved star is no that imposing when contrasted to some of the various other largest recognized stars in the universe.

Aldebaran is a red giant located 65 lightyears away. It is 44 times larger than ours sun and also 400 times much more luminous.Rigel is a blue supergiant situated 864.3 light-years away. It is 75 times bigger than our sun and 100 000 times an ext luminous.Antares is a red supergiant situated 555.5 lightyears away. That is 685 times larger than our sun and 10,000 times more luminous.Betelgeuse is a red supergiant located 642.5 lightyears away. That is 1,400 times bigger than our sun and also 100,000 times much more luminous.VY Canis Majoris is a red hypergiant situated 3,900 lightyears away. That is 1,420 times bigger than our sun and also 270,000 times an ext luminous.UY Scuti is a red supergiant located 5,219 lightyears away. The is 1,700 times larger than our sun and also 340,000 times much more luminous.Stephenson 2-18 is a red supergiant situated 20,000 lightyears away. The is 2,150 times bigger than our sun and also 440,000 times an ext luminous.
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We understand that the sun has a diameter the 864,000 miles. Multiplying this number by pi will offer the sun’s circumference: 2,713,406 miles. Another method to evaluate the dimension of the sunlight is by calculating the moment it would take to travel about it making use of different way of transportation. Yes, we are that geeky!

A human wade non-stop in ~ the speed of about 5 km/h (3 mph) would take around 100 years.A car control non-stop at an typical speed the 100 km/h (60 mph) would take around 5 years.A passenger plane paris non-stop at an median speed of 965 km/h (600 mph) would certainly take about 6 months.A rocket paris non-stop at an mean speed the 28,324 km/h (17,600 mph) would take about 6.4 days.At the speed of light, it would take 9 seconds to go around the SunAnother way to evaluate the size of the sun is through calculating the moment it would take to travel roughly it making use of different means of transportation. Yes, we are that geeky! 

The sunlight will indeed end up being much larger in the future. There will come a time once the perpetual balance between the atom energies advertise outward and the gravitational forces pulling inward will be destabilized. As soon as the Sun has actually consumed most of its hydrogen reserve, the surface of the sunlight will progressively broaden up to a size that covers the entire orbit of Mars, engulfing Mercury, Venus and Earth in the process.

After continuing to be a red giant star for around a exchange rate years, the sunlight will shrink again and become a white dwarf when its helium it is provided is depleted. We have actually no reason to be concerned, however, because these events will no take location for at least another 5 exchange rate years.


The Sun has an angular dimension of about 0.53 degrees or around 1/4 that the width of your thumb when viewed in the sky. Funnily enough, it is the exact same angular dimension as the Moon. That’s because although the sunlight is 400 times bigger than the moon, that is situated 400 times more away.


The biggest known star was for a lengthy time UY Scuti (1700 times bigger 보다 our sun). However it has recently been surpassed by Stephenson 2-18, a red supergiant 2,150 times bigger than our sun.


Although the sun is at this time in a relatively quiet step of that life, that will flourish to end up being a red large in about 5 billion years.


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Hey! I’m Tom Urbain, the founder the aramuseum.org. I’ve to be fascinated by space and astronomy native a an extremely young age. Once I’m not watching space-themed documentaries, movies or TV series, ns spend most of my complimentary time in mine backyard admiring the planets and galaxies through my telescope.

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Is the stimulate of the planets important? In a way, yes, because that the security of our solar mechanism is entirely based on where each world is currently located.