From Earth, it is 1 astronomical unit (1.496 × 108 km) or about 8 light-minutes away. Its diameter is about 1,391,400 km (864,600 mi), 109 times that of Earth. Its mass is about 330,000 times that of Earth, making up about 99.86% of the total mass of the Solar System.

2025年2月13日 · Our Sun is a 4.5 billion-year-old yellow dwarf star – a hot glowing ball of hydrogen and helium – at the center of our solar system. It’s about 93 million miles (150 million kilometers) from Earth and it’s our solar system’s only star. Without the Sun’s energy, life as we know it could not exist on our home planet.

2025年2月3日 · The Sun. The Sun is the star at the heart of our solar system. Its gravity holds the solar system together, keeping everything — from the biggest planets to the smallest bits of debris — in its orbit.

2025年1月14日 · Our Sun is about 100 times wider than Earth, but it is just an average sized star. Astronomers have found some stars that are 100 times bigger than the Sun and others that are 10 times smaller. The Sun is also right in the middle of its lifecycle. Right now, our Sun is in a stage called yellow dwarf. It is about 4.5 billion years old.

2024年2月3日 · The Sun consists of several distinct layers, each with unique properties and processes. These layers fall into two main sections: the solar atmosphere and the solar interior. Or, since the interior layers are so large, the four layers of the Sun are its atmosphere, convective zone radiative zone, and core.

The Sun is a 4.5 billion-year-old yellow dwarf star – a hot glowing ball of hydrogen and helium – at the center of our solar system. It’s about 93 million miles (150 million kilometers) from Earth and it’s our solar system’s only star. Without the Sun’s energy, life …

2025年3月8日 · Sun, star around which Earth and the other components of the solar system revolve. It is the dominant body of the system, constituting more than 99 percent of its entire mass. The Sun is the source of an enormous amount of energy, a portion of which provides Earth with the light and heat necessary to support life.

In order from the Sun, they are four terrestrial planets (Mercury, Venus, Earth and Mars); two gas giants (Jupiter and Saturn); and two ice giants (Uranus and Neptune). All terrestrial planets have solid surfaces. Inversely, all giant planets do not have a definite surface, as they are mainly composed of gases and liquids. Over 99.86% of the ...

Typical magnetic field strengths for various parts of the Sun Polar Field: 1 - 2 Gauss Sunspots: 3000 Gauss Prominences: 10 - 100 Gauss Chromospheric plages: 200 Gauss Bright chromospheric network: 25 Gauss Ephemeral (unipolar) active regions: 20 Gauss Solar Atmosphere Surface Gas Pressure (top of photosphere): 0.868 mb Pressure at bottom of ...

2025年1月6日 · NASA and other international space agencies monitor the Sun 24/7 with a fleet of solar observatories, studying everything from the Sun’s atmosphere to its surface. NASA’s Parker Solar Probe is studying our star from closer than any previous spacecraft.