Facts about the sun

Do you know about these 9 facts about The Sun?

The Sun, the center of our solar system, is the reason for life on earth, and the energy source for many other celestial objects. the Sun is located in the Milky Way galaxy in a spiral arm called the Orion Spur that extends outward from the Sagittarius arm.

Today, we have collected 9 facts about the sun that I believe you did not know.

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1. Largest in the Solar System

The sun is the largest object in the solar system. It is very obvious that the sun is the largest then where are the special facts about the sun. Here it is, do you know how large is it?

The Sun has a diameter of about 1.39 million kilometers (864,000 miles) or 109 times that of Earth. Putting 109 earths in a row would not best the sun.

2. Most massive

No doubt, if it is the largest, then it must be the most massive. But how massive?

Its mass is about 330,000 times that of Earth; it accounts for about 99.86% of the total mass of the Solar System. Talking about its volume, it would take 1.3 million piles of earth to fill the volume of the sun.

3. A gaseous Body

The sun is a gaseous body. But it does have some solid surfaces too.

For more specific analysis, the three-quarter of the sun is filled with hydrogen (around 73%), a gaseous element. Around 25% is filled with helium, another gaseous object.

On the remaining 2%, there are other elements like oxygen, carbon, neon and iron.

4. Yellow Dwarf

The Sun is a G-type main-sequence star (G2V) based on its spectral class. As such, it is informally and not completely accurately referred to as a yellow dwarf (its light is closer to white than yellow).

It formed approximately 4.6 billion years ago from the gravitational collapse of matter within a region of a large molecular cloud. Most of this matter gathered in the center, whereas the rest flattened into an orbiting disk that became the Solar System.

The central mass became so hot and dense that it eventually initiated nuclear fusion in its core. It is thought that almost all stars form by this process.

5. A Huge Source of Energy

The Sun’s core fuses about 600 million tons of hydrogen into helium every second, converting 4 million tons of matter into energy every second as a result.

This energy, which can take between 10,000 and 170,000 years to escape the core, is the source of the Sun’s light and heat. 

6. Limited Energy

When hydrogen fusion in its core has diminished to the point at which the Sun is no longer in hydrostatic equilibrium, its core will undergo a marked increase in density and temperature while its outer layers expand, eventually transforming the Sun into a red giant.

It is calculated that the Sun will become sufficiently large to engulf the current orbits of Mercury and Venus, and render Earth uninhabitable – but not for about five billion years.

After this, it will shed its outer layers and become a dense type of cooling star known as a white dwarf, and no longer produce energy by fusion, but still glow and give off heat from its previous fusion.

7. Brightest Object in Earth’s Sky

The Sun is by far the brightest object in the Earth’s sky, with an apparent magnitude of −26.74 This is about 13 billion times brighter than the next brightest star, Sirius, which has an apparent magnitude of −1.46.

One astronomical unit (about 150,000,000 km; 93,000,000 mi) is defined as the mean distance of the Sun’s center to Earth’s center, though the distance varies as Earth moves from perihelion in January to aphelion in July

8. Dual Rotation

The Sun rotates faster at its equator than at its poles. This differential rotation is caused by convective motion due to heat transport and the Coriolis force due to the Sun’s rotation.

In a frame of reference defined by the stars, the rotational period is approximately 25.6 days at the equator and 33.5 days at the poles.

Viewed from Earth as it orbits the Sun, the apparent rotational period of the Sun at its equator is about 28 days.Viewed from a vantage point above its north pole, the Sun rotates counterclockwise around its axis of spin.

9. The Sun is a Population I Star

The Sun is a Population I, or heavy-element-rich, star

What is a Population I star?

Well, stars with the highest metallicity come under the population I star.

It is a system of classification of stars according to their chemical composition. There are three classes namely, Population I, Population II, and Population III. Metallicity decreases as a class no. increases.


Thats all from my side. Tell me one thing did you really know these 9 facts about the sun? Answer by your comments.

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