ilikeliner.blogg.se - Triangle sun corona

Solar prominences are displayed in this video from NASA’s Solar Dynamics Observatory (SDO). Prominences are also visible during a total solar eclipse. Prominences can last for a day to several months. If plasma flows along a loop of the Sun’s magnetic field from sunspot to sunspot, it forms a glowing arch that reaches thousands of kilometers into the Sun’s atmosphere. The first video describes the basics of our Sun, including how it is powered by nuclear reactions (1e): (8:34).Īnother highly visible feature on the Sun is solar prominences.

Convective movement helps to create solar flares and sunspots.

In the convection zone, hot material from near the radiative zone rises, cools at the Sun’s surface, and then plunges back downward to the radiative zone.

A photon may take as long as 50 million years to travel all the way through the radiative zone. The photon is absorbed and then released again. A particle of light, called a photon, travels only a few millimeters before it hits another particle. The energy released in the core travels extremely slowly through the radiative zone.

The radiative zone, just outside the core, has a temperature of about 7 million oC.

Nuclear fusion in stars is discussed more in the Stars, Galaxies, and the Universe chapter.

This energy moves outward, towards the outer layers of the Sun. At such high temperatures hydrogen combines to form helium by nuclear fusion, a process that releases vast amounts of energy.

The Sun’s central core is plasma with a temperature of around 27 million oC.