what couses aurora?
what is solar wind?
why does aurora have different colors?
does aurora occur in other planets?
why does aurora only occur in poles?
if you are interested in knowing the answers of these questions,dont hesitate to check out my precentation:)
what couses aurora?
what is solar wind?
why does aurora have different colors?
does aurora occur in other planets?
why does aurora only occur in poles?
if you are interested in knowing the answers of these questions,dont hesitate to check out my precentation:)
Please write a full essay describing the following phenomen solar and.pdfthangarajarivukadal
Please write a full essay describing the following phenomen solar and how the Sun\'s magnetic
field produces each of prominences, solar flares, CME\'s and auroras.
Solution
The sun, like the earth, generates a magnetic field that extends out into space. However, the
sun\'s magnetic field changes both its shape and intensity over the surface, and over time, much
more rapidly.In the Sun, the flows of hot plasma in the convection zone create the solar magnetic
field. The plasma is a hot gas \"soup\" with many free charged particles (electrons and protons).
The moving charges are a current, and produce magnetic fields, just like the current in coils of
wire around the nail. What\'s different in the sun? The convection current is driven by the heat
from the Sun\'s fusion, instead of a battery.
Sunspots are regions of very strong magnetic field, where the field lines get so crowded together
that they push up through the surface, bringing some of the hot plasma with them in a spectacular
arc, or loop. We see the end of the loop as a sunspot on the sun\'s visible surface, or photosphere.
This dense bundle of field lines creates huge magnetic pressures. What is magnetic pressure? We
know what pressure is in a gas: if you compress some gas, like squeezing a balloon, it tries to
push out again.
A solar flare is a magnetic storm on the Sun which appears to be a very bright spot and a gaseous
surface eruption. Solar flares release huge amounts of high-energy particles and gases and are
tremendously hot (from 3.6 million to 24 million °F). They are ejected thousands of miles from
the surface of the Sun.
A solar prominence (also known as a filament) is an arc of gas that erupts from the surface of the
Sun. Prominences can loop hundreds of thousands of miles into space. Prominences are held
above the Sun\'s surface by strong magnetic fields and can last for many months. At some time
in their existence, most prominences will erupt, spewing enormous amounts of solar material
into space.
The outer solar atmosphere, the corona, is structured by strong magnetic fields. Where these
fields are closed, often above sunspot groups, the confined solar atmosphere can suddenly and
violently release bubbles of gas and magnetic fields called coronal mass ejections. A large CME
can contain a billion tons of matter that can be accelerated to several million miles per hour in a
spectacular explosion. Solar material streams out through the interplanetary medium, impacting
any planet or spacecraft in its path. CMEs are sometimes associated with flares but can occur
independently..
1. The Aurora Borealis
Composer: Carl Orff,in the year 1936
Perormed by: The Boston Symphany Orchestra
MUSIC BY: Carmina Burana
Click Mouse to advance
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15. Since the World began, Solar Lights have been an Integral part of
our planet Earth. They do not depend at all on the human activity, but
rather on that of the Sun and the terrestrial magnetic field.
The Dawn is not as one once believed (until some 70 years ago),
that causes the reflection of solar light on the ices of the Arctic.
However, it is indeed the Sun, which is responsible for the Polar
Lights as the turbulent surface of the Sun rejects into the space the
atoms and the subatomic particles (protons, electrons).
At the time of violent solar storms, a great quantity of electrons and
protons coming from the Sun arrive in the terrestrial atmosphere and
activate the nitrogen and oxygen atoms, which become suddenly
luminous and produce the splendid veils (ribbons or curtains) of
coloured light, which are the polar lights.
They are named Polar because once arrived in the terrestrial
atmosphere, the particles are taken by the trap of the magnetic field,
which forces them to move towards the magnetic poles either north
(Northern Lights) or in the south (Aurora Australis)
Dawn with the shape of a thin elliptic band (the auroral oval) is
centred on the magnetic north and south poles, i.e. approximately
within 700 meters of the geographical poles. The size of this form
depends on the solar activity: the more the Sun is quiet" and the
solar wind calm the oval is smaller; conversely the more the solar
wind strikes the terrestrial magnetic field with force and gusto, more
the dawn becomes broad and extends.
Aurore North & South
16.
17.
18.
19.
20.
21.
22.
23. The Affect of the Solar
atmosphere
The temperature of the solar atmosphere is several million degrees
Kelvin (temperature °C = temperature
°K - 273,15).
At these temperatures, the collisions between the particles are so
violent that the hydrogen atoms break up into electrons and protons.
This “material" is called ionized plasma.
The Solar wind is when this plasma moves away from the sun in all
the directions. transports the Solar Magnetic Field into interplanetary
space. The speed and the density of this solar wind vary greatly.
They are larger when the wind comes from the active areas of the
sun, like the solar spots or protuberances.
