This texture is caused by the numerous convection cells within the underlying convection zone. The granulated, orange-peel like, appearance of the Sun originates from the photosphere.
Photosphere definition free#
When these magnetic field lines effectively break, the previously constrained material can burst free at high speeds in the form of solar flares. The photosphere is the external layer of the Sun which is known as the luminous envelope or the visible layer of the sun from which light as well as heat radiate. A star is a hot, dense, ball of hydrogen and helium gas (with a tiny bit of the heavier. First, let us briefly review the definition of a star. About Photosphere Definition Photosphere is the lowest visible layer of a star, lying beneath the chromosphere and the corona. The term itself is derived from Ancient Greek roots,, /phos, photos meaning 'light' and /sphaira meaning 'sphere', in reference to the fact that it is a spherical surface that is perceived to emit light. Sunspots arise when strong magnetic fields inhibit the hot plasma from rising up through the underlying convection zone. This is a short discussion of the structure of a star known as the photosphere - important, since it is the structure that emits virtually all of the light we see from a star. The photosphere of an astronomical object is the depth of a star's outer shell from which light is radiated. The typical temperature of the photosphere is some 6000 oC, although relatively cool (4000 oC) regions known as sunspots are not uncommon. Since the Sun is so far away, the edge of the photosphere appears sharp to the naked eye, but in reality the Sun has no surface, since it is too hot for matter to exist in anything but a plasma statethat is, as a gas composed of ionized atoms. It is only a few hundred kilometres thick. photosphere, visible surface of the Sun, from which is emitted most of the Sun’s light that reaches Earth directly.
The photosphere is effectively the radial zone at which the density of ionised hydrogen atoms becomes low enough that the photons can escape unhindered. While the chromosphere resides above the photosphere, and, in turn, the corona envelopes the chromosphere, the density of the chromosphere and corona are so low that they are transparent. It is actually the transition between corona and the. The photosphere is typically regarded as the surface of our Sun. Definition: Chromosphere is a reddish and glowing layer of gas above a stars (or Suns) photosphere.
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