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.

2024年11月5日 · The part of the Sun we call its surface – the photosphere – is a relatively cool 10,000 °F (5,500 °C). In one of the Sun’s biggest mysteries, the Sun’s outer atmosphere, the corona, gets hotter the farther it stretches from the surface.

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.

2024年12月27日 · The Sun’s gravity holds the solar system together, keeping everything – from the biggest planets to the smallest particles of debris – in its orbit. The connection and interactions between the Sun and Earth drive the seasons, ocean …

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 ...

2013年1月22日 · The sun and its atmosphere consist of several zones or layers. From the inside out, the solar interior consists of: the Core (the central region where nuclear reactions consume hydrogen to form helium. These reactions release the …

2018年9月15日 · The sun's surface temperature is about 10,000 degrees Fahrenheit (5,500 degrees Celsius), and it's 27 million degrees Fahrenheit (15.5 million Celsius) at the core. Deep in the sun's core,...

2025年1月14日 · 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 …

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.

2013年1月23日 · Anatomy of the Sun – from Mysteries of the Sun Image of the Sun with cut-away portion showing the solar interior with text descriptions of the regions as follows (from inner-most to outer-most): The Sun’s Core – Energy is generated via thermonuclear reactions creating extreme temperatures deep within the Sun’s core.