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. It is by far the most important source of …

The solar surface refers to the visible boundary of the sun where the steep radial gradient in solar density gives rise to a sharp transition between lower regions and higher regions, allowing photons to move away from the sun along straight trajectories without collisions.

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 ...

The surface of the Sun is called the photosphere, a term which means “sphere of light.” The glowing ball of light that you see in the sky is the photosphere. The surface of the Sun is the only part that we can see from Earth on a typical day, without use of specialized equipment.

Jan 14, 2025 · The photosphere is the visible surface of the Sun that we are most familiar with. Since the Sun is a ball of gas, this is not a solid surface but is actually a layer about 100 km thick (very, very, thin compared to the 700,000 km radius of the Sun).

The surface of the sun is electrically active and it is completely covered by the photosphere. The sun's surface rotates uniformly every 27.3 days unlike the plasma layer of the photosphere.

Spicules have a thread-like appearance, and the solar surface consists of at least 10 million such spicules at any given moment. Spicules ( Source ) They are responsible for transferring heat throughout the Sun, and they extend for 6,000 miles above …

Feb 3, 2024 · The solar atmosphere is the outermost region of the Sun, visible during total solar eclipses. It consists of three primary layers: Photosphere. Thickness/Size: Approximately 500 kilometers. Temperature: Around 5,500°C. Characteristics: The photosphere is the Sun’s visible surface, where light is emitted that we see from Earth. It’s marked ...

Jan 31, 2020 · A new solar telescope in Hawaii has taken its first photo and movie of the Sun. The shots are the highest resolution views of our star yet, showing details as small as 18 miles across.

1 day ago · The upcoming partial solar eclipse on March 29 is the perfect time to watch the moon hide and then reveal dark patches on the surface of the sun.