What causes granulation on the photosphere quizlet?

What causes granulation on the photosphere quizlet?

Granules on the photosphere of the Sun are caused by convection currents (thermal columns, Bénard cells) of plasma within the Sun’s convective zone. The grainy appearance of the solar photosphere is produced by the tops of these convective cells and is called granulation.

Does the Sun’s photosphere have a granular pattern?

Solar granules are cellular patterns visible in the outer layer (photosphere) of Sun, associated with large scale vertical fluid motions at, and just below, the photosphere.

What is the explanation for the pattern of granulation?

The granular formation is due to the convective motion of the gas in the sub-photospheric layers, with the bright centre as upward flows and the dark lanes as downward flows. This overturning fluid carries heat bodily to the solar surface.

Why does the surface of the Sun look like a bubbling pattern with cellular structure?

These blobs are evidence of “boiling” plasma being pushed out of the Sun’s surface. The plasma escapes at the center of each structure and a mound is created when the boiling material falls back to the ground. The researches took these images to better understand the activity of the Sun, or space weather.

What process causes granulation on the Sun?

Close-up views of the photosphere also show patterns of light areas surrounded by darker borders, called “granulation.” Similar to the patterns you can see at the top of a pot of boiling water or oatmeal, granulation is caused by heat rising upward to the photosphere from the hotter solar interior.

What causes the bubbling pattern of granulation that we see in the Sun’s photosphere quizlet?

Granules on the photosphere of the Sun are caused by convection currents of plasma within the Sun’s convective zone. The grainy appearance of the solar photosphere is produced by the tops of these convective cells and is called granulation.

Why do we see a skin like pattern when looking at the photosphere?

If you look at photographs of the photosphere, you’ll notice it has a sort of mottled appearance to it. This is due to granulation, a cell-like pattern on the photosphere caused by granules.

Is granulation is caused by convection currents just below the photosphere?

Granulation is caused by the convection operating below the photosphere. This convection produces columns of rising gas just below the photosphere that are about 700 to 1000 km in diameter. In these columns hot gas rises with a velocity of several kilometers per second, as confirmed by Doppler shift measurements.

What phenomenon occurs on the photosphere?

The photosphere is marked by bright, bubbling granules of plasma and darker, cooler sunspots, which emerge when the sun’s magnetic field breaks through the surface. Sunspots appear to move across the sun’s disk. Observing this motion led astronomers to realize that the sun rotates on its axis.

Why does the pattern of granulation on the Sun’s surface have darker edges?

Hot gas rises in the middle of a granule, and this area appears brighter, then the gas cools and sinks on the edges of the granule and these areas are darker.

What are the factors affecting granulation?

• Particle Size Distribution. The particle size distribution of feedstock is a key contributor to the success of a granulation process. …
• Moisture Content. The wet granulation process relies on capillary forces to be effective. …
• Material Composition.

• Particle Size Distribution. The particle size distribution of feedstock is a key contributor to the success of a granulation process. …
• Moisture Content. The wet granulation process relies on capillary forces to be effective. …
• Material Composition.

What happens during granulation?

Granulation tissue is produced during the repair phase. This is a complex of fibroblasts, vascular endothelial cells, and macrophages within a matrix of collagen and fibrin. Fibroblasts and capillaries appear in the wound by day 3. Fibroblasts use the fibrin clot as a matrix and replace it with new matrix.

Which physical process is thought to have created the Local Bubble near our sun in the galaxy?

The Local Bubble is thought to be the result of supernova explosions, which swept out a cavity of hot ionized gas and pushed most of the evacuated matter, together with the frozen-in magnetic field, into a dense shell of cold neutral gas and dust (Cox & Reynolds 1987; Shelton 1998; Fuchs et al.

Why we can see the photosphere but not the other layers of the Sun?

It is the most visible surface of the sun. It is the part from where the sun’s light reaches directly to the Earth. The sun is so distant from the earth as the edge of the photosphere appears sharp to the naked eye. But the sun has no surface because it is too hot to be a matter in it.

Why do we study the surface of the Sun What are we looking for and why?

The sun is a normal star. It is much closer to us than any other star, and by studying the sun, we can therefore learn more about other stars. The better we understand other stars, the more we know about the Milky Way. From there we know more about other galaxies and in the end we learn more about the universe.

What are the factors that cause granulation?

Granulation tissue formation is part of a normal healing process. Under certain conditions, such as infection, self-mutilation, or a local reaction to a chronically implanted, foreign material, this tissue grows uncontrollably and becomes very vascular and secretive.

What does granulation on the surface of our Sun indicate?

You can observe so-called granules, areas of about 1000 km in diameter, where hot gas from inside the Sun rises to reach the surface of the Sun. As the gas cools down, the gas slides down again into the Sun’s interior. The brighter regions indicate hot, rising gas – the darker regions cool and down-welling gas.

Where does granulation take place?

Granulation tissue is new connective tissue and microscopic blood vessels that form on the surfaces of a wound during the healing process. Granulation tissue typically grows from the base of a wound and is able to fill wounds of almost any size.

What evidence can you give that granulation is caused by convection quizlet?

what evidence can you give that the granulation is caused by confection? The evidence for granulation being caused by convection is that convection is caused by the mottled appearance of the solar photosphere, caused by gases rising from the interior of the Sun.