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Sun | |
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Diameter (km) | 1392684 |
Equator (km) | 4370005 |
![]() | 5778000 |
<p>The Sun is the star at the center of the Solar System. </p>It is a sphere of plasma, with inner convective movement that generates a magnetic field by means of a dynamo process. It is by far the main source of energy for life on Earth. Its diameter is about 1.39 million kilometers (864,000 miles), or 109 times that of Earth, and its mass is about 330,000 times that of Earth. It accounts for about 99.86% of the total mass of the Solar System.
Roughly three quarters of the Sun's mass is composed of hydrogen (~73%); the remainder is mostly helium (~25%), with much smaller amounts of heavier elements, including oxygen, carbon, neon, and iron.The Sun is a G-type main-sequence celebrity (G2V) based on its spectral class. As such, it's informally rather than 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. Whereas the remainder flattened into an orbiting disk that became the Solar System, most of this matter gathered in the center. The central mass became dense and so hot that it initiated nuclear fusion. It is believed that almost all stars form by this process.
<p>The Sun is the star at the center of the Solar System. </p>It is a sphere of...
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<p>Jupiter is the fifth planet from the Sun and the largest in the Solar System....