The Sun is the star at the center of the Solar System. It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation with 10% at ultraviolet energies.

2022年1月27日 · The sun is a big ball of gas and plasma, but what is the sun made of exactly? Most of the gas — around 92% — is hydrogen, according to NASA. It is converted into energy in the sun's core.

2020年12月22日 · The most common gases in the sun, by mass, are: hydrogen (about 70 percent, helium (about 28 percent), carbon, nitrogen and oxygen (together about 1.5 percent). The remainder of the sun's mass (0.5 percent) is made up of a mixture of trace amounts of other elements, including but not limited to neon, iron, silicon, magnesium and sulfur.

2018年1月12日 · Here is a table listing the Sun's elemental composition, which we know from analysis of its spectral signature. Although the spectrum we can analyze comes from the solar photosphere and chromosphere, scientists believe it is representative of …

The Sun is a huge, glowing sphere of hot gas. Most of this gas is hydrogen (about 70%) and helium (about 28%). Carbon, nitrogen and oxygen make up 1.5% and the other 0.5% is made up of small amounts of many other elements such as neon, iron, silicon, magnesium and sulfur.

2024年2月2日 · The sun is an ordinary star, one of about 100 billion in our galaxy, the Milky Way. The sun has extremely important influences on our planet: It drives weather, ocean currents, seasons, and climate, and makes plant life possible through photosynthesis. Without the sun’s heat and light, life on Earth would not exist.

The Sun, like all stars, is an enormous ball of extremely hot, largely ionized gas, shining under its own power. And we do mean enormous. The Sun could fit 109 Earths side-by-side across its diameter, and it has enough volume (takes up enough space) to hold about 1.3 million Earths.

The Sun is a glowing, spinning ball of very hot gases, primarily hydrogen (92.1%) and helium (7.9%). Trace amounts of other elements (0.1%), such as oxygen, carbon, nitrogen, silicon, magnesium, neon, iron, and sulfur are also present (NASA). In the extreme heat of the Sun, most of the gas exists as plasma. Plasma is an electrically charged gas ...

Solar Atmosphere Surface Gas Pressure (top of photosphere): 0.868 mb Pressure at bottom of photosphere (optical depth = 1): 125 mb Effective temperature: 5772 K Temperature at top of photosphere: 4400 K Temperature at bottom of photosphere: 6600 K Temperature at top of chromosphere: ~30,000 K Photosphere thickness: ~500 km Chromosphere thickness: ~2500 km Sun Spot Cycle: 11.4 yr. Photosphere ...

2023年12月1日 · The sun is a dynamic star, made of super-hot ionized gas called plasma. The sun's surface and atmosphere change continually, driven by the magnetic forces generated by this constantly-moving plasma.