What is the corona sphere?

The corona is the outer atmosphere of the Sun. It extends many thousands of kilometers (miles) above the visible “surface” of the Sun, gradually transforming into the solar wind that flows outward through our solar system. The material in the corona is an extremely hot but very tenuous plasma.

In astronomy, a corona is The luminous plasma “atmosphere” of the Sun or other celestial body, extending millions of kilometres into space, most easily seen during a total solar eclipse, but also observable in a coronagraph.

The Short Answer:

The Sun’s corona is The outermost part of the Sun’s atmosphere. The corona is usually hidden by the bright light of the Sun’s surface. That makes it difficult to see without using special instruments. However, the corona can be viewed during a total solar eclipse.

All NASA Missions

Now, using NASA’s Solar Terrestrial Relations Observatory, scientists have found that this atmosphere, called the corona, is even larger than thought, extending out some 5 million miles above the sun’s surface — the equivalent of 12 solar radii.

The Sun – our central star

Beginning from the outside, they are: the corona – The outermost, hot shell of the atmosphere. the chromosphere – a transparent layer between the corona and the photosphere. the photosphere – the visible “surface” of the Sun.

Because the coronal material is so thin and tenuous, only a tiny portion of all the sound energy in the photosphere needs to bleed up into the corona and be absorbed in order to heat it to the observed temperatures.

Temperatures in the corona — the tenuous, outermost layer of the solar atmosphere — spike Upwards of 2 million degrees Fahrenheit, while just 1,000 miles below, the underlying surface simmers at a balmy 10,000 F.

The core Is at the center. It the hottest region, where the nuclear fusion reactions that power the Sun occur. Moving outward, next comes the radiative (or radiation) zone. Its name is derived from the way energy is carried outward through this layer, carried by photons as thermal radiation.

Corona, outermost region of the Sun’s atmosphere, consisting of Plasma (hot ionized gas). It has a temperature of approximately two million kelvins and an extremely low density. The corona continually varies in size and shape as it is affected by the Sun’s magnetic field.

The visible surface of the Sun, or the photosphere, is around 6,000°C. But a few thousand kilometres above it – a small distance when we consider the size of the Sun – the solar atmosphere, also called The corona, is hundreds of times hotter, reaching a million degrees celsius or higher.

Corona – The corona is the outermost layer of the Sun, starting at about 1300 miles (2100 km) above the solar surface (the photosphere). The temperature in the corona is 500,000 K (900,000 degrees F, 500,000 degrees C) or more, up to a few million K.

The sun’s photosphere

The term photosphere Means “sphere of light” And is the layer where most of the sun’s energy is emitted. It takes about eight minutes for sunlight from the photosphere to reach Earth.

NASA set to fly into Sun’s corona within 3.8 million miles From solar surface – Hindustan Times.

The sun is classified as a G-type main-sequence star, or G dwarf star, or more imprecisely, a yellow dwarf. Actually, The sun — like other G-type stars — is white, but appears yellow through Earth’s atmosphere.

Several sources online say that the coolest layer of the sun is The photosphere, while “What is the Sun? – Facts, Layers & Temperature” says that the chromosphere is the coolest layer of the sun.

A solar flare on Sunday night caused a coronal mass ejection (CME), where a portion of the Sun’s atmosphere breaks off and sends high-energy particles into space. The CME came 10 hours earlier than forecasted but the magnitude of G1 storms was accurate, according to the Boulder, Colo.

Space Environment

The solar wind is a stream of energized, charged particles, primarily electrons and protons, flowing outward from the Sun, through the solar system at speeds as high as 900 km/s and at a temperature of 1 million degrees (Celsius). It is made of plasma.

Scientists have estimated that the corona is between 10 to 20 solar radii from the Sun’s surface, or around 4.3 to 8.6 million miles.

The sun is made up of six layers: Core, radiative zone, convective zone, photosphere, chromosphere, and corona.

The material in the corona is an extremely hot but very tenuous plasma. The temperature in the corona is more than a million degrees, Surprisingly much hotter than the temperature at the Sun’s surface Which is around 5,500° C (9,940° F or 5,780 kelvins).