Hello
guys welcome back with new post. In this blog we will discuss about the Dancing
lights often called Auroras visible from the northern and southern poles. Our
planet is full of mysteries and auroras serves major role. It is creating much
curiosity since it was identified
In rainy
season we see rainbow with eye witnessing colors. What will happen if we able
to watch such fascinating colors dancing in clear night sky with twinkling
stars everyday. If you want to get such mind-blowing experience you must visit
to northern and southern poles. Large number of tourists travels and visit Siberia,
Alaska, Antarctica to experience eye popping lights.
Auroras
sometimes called dancing lights or northern lights and southern lights visible
from high altitude regions around the Artic poles. Let’s begin the journey.
Myths about Auroras
Ancient
people thought that it was light pool which is created by god itself. And many
people also believe that they are the souls of their ancestors which were
dancing in the sky.
What causes the Aurora?
Actually,
Auroras did not form due to ancestors. it formed mainly due to sun and earth
gravitational field. The journey of Auroras starts from the sun. We the seen
the sun which rises and set everyday calmly. If we took closer to sun there are
many unusual and dangerous phenomena occurs at sun surface naturally like solar
flares and coronal mass ejections. Solar flares lift nearly 1000km above sun
surface. It releases solar winds which create disturbance to earth
magnetosphere resulting in phenomenon like Auroras.
Solar winds
let’s
understand the concept of solar winds.
Solar
wind is the stream of highly charged particles ejected from sun surface.
solar
winds consist of heavy ions and atomic nuclei such as ferrous, magnesium,
carbon, nitrogen, oxygen, silica and Sulphur etc. These particles are able to
escape from sun gravity due to there high amount of energy with high
temperature called as coronal magnetic field. And it travels into space with
supersonic speed means faster than speed of sound.
Interaction with earth’s magnetic field
In
coronal mass ejection sun throws its charged particles into space in the form
of solar winds. Solar winds take nearly two days to travel to earth. These
charged particles are very dangerous if they get directly bombarded to us. but
due to gravitational field of earth they are unable to reach towards us
directly. When its passes from near to earth, it gets attracted towards earth
due to gravitational field. They get highly attracted towards earth
pole because gravitational force is very high near the poles (north pole and
south pole).
When
these charged particles come in contact with oxygen and nitrogen present in
earth atmosphere ionization occurs. Atoms get excited to higher energy levels
and when they come back to lower energy band, they emit energy. Energy emitted
is in the form of radiations of different colors. The light consists of mainly
green, blue, red and purple light. Because the oxygen gives red and green light
and nitrogen gives purple and blue light.
Auroras on other planets
So,
Auroras cause due to magnetosphere of planets. It has presence on other planets
also. planets like Jupiter, Saturn, Uranus, Neptune and even comets have
presence of Aurora.
So its
enough for today. we will meet again with new interesting topic. Have a great
day.😊