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aurora, luminous phenomenon of Earth’s upper atmosphere that occurs primarily in high latitudes of both hemispheres; in the Northern Hemisphere auroras are called aurora borealis, aurora polaris, or northern lights, and in the Southern Hemisphere they are called aurora australis or southern lights. Fast Facts.
In which layer do auroras eg Northern Lights occur *?
Thermosphere. Troposphere. In which layer do auroras (e.g. northern lights) occur? Exosphere.
Why is the situation in the troposphere defined as unstable?
The situation in the troposphere is defined as unstable because the reaction of the natural atmospheric phenomenon like climate, temperature, humidity, rainfall etc. are not realists predictable and stable. And all weather and atmospheric activities (thunder, storm, rainfall, clouds formation etc.)
Why do you think satellites are placed in the thermosphere?
It is called the thermosphere because temperatures can reach up to 1,500 degrees Celsius (2,732 degrees Fahrenheit). However, despite the high temperatures, the pressure is very low, so satellites don’t suffer heat damage.
What causes the auroras of the giant planets?
Scientists do this by studying the electromagnetic radiation received from the planets, and certain wavelength emissions are good indicators of the presence of auroras. Each of the gas giants (Jupiter, Saturn, Uranus, and Neptune) has a strong magnetic field, a dense atmosphere and, as a result, its own aurora.
What causes Jupiter’s auroras quizlet?
the auroras in the polar regions of jupiter and saturn are cause by charged particles spiraling in the magnetic fields of these two planets, reaching the polar regions where the fields plunge into the atmosphere, and crashing into atoms and molecules in the atmosphere. … when they de-excite, they emit the auroral light.
Why does Jupiter radiate more energy?
The jovian planets get their heat from the Sun and from their interiors. Jupiter creates a lot of internal heat and releases this heat by emitting thermal radiation. In fact, Jupiter creates so much internal heat that it emits almost twice as much energy as it receives from the Sun.
Do auroras make sound?
The sounds of the auroras
People have described the sound of the northern lights as a quiet and almost imperceptible crackling, whooshing or whizzing noise.
Can the human eye see the Northern Lights?
Unlike Yellowknife is clear skies throughout the year and more chance of seeing the auroras (240 days a year). … The color of the aurora depends on the wavelength of the light emitted. Thus, the human eye primarily views the Northern Lights in faint colors and shades of gray and white.
Can planes fly through Northern Lights?
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The Northern Lights are most commonly spotted in the northernmost points of the world: Alaska, northern Canada, Greenland, Norway, Sweden, Finland and Iceland. If you’re flying near any of these destinations, there’s a chance that you’ll catch the aurora borealis in action during your flight.
What causes Aurora quizlet?
Auroras are caused by the interactions of the particles ejected from the Sun and the earth’s magnetosphere. … constant stream of particles flowing from the Sun is known as the solar wind.
Where in the northern hemisphere is the aurora or northern lights most often found quizlet?
An area of the atmosphere containing positively charged particles called ions (Aruora Borealis or Northern Lights)and found in the upper mesosphere and lower thermosphere.
What are northern lights quizlet?
the collisions between gaseous particles in the earth’s atmosphere and electrically charged particles realeased from the sun’s atmosphere. what are the Northern lights called in the North? Aurora Borealis.
How often do auroras occur?
“Active periods are typically about 30 minutes long, and occur every two hours, if the activity is high. The aurora is a sporadic phenomenon, occurring randomly for short periods or perhaps not at all.”
What is the difference between aurora and Northern Lights?
Key Difference: The main difference between the Northern Lights and Aurora Borealis is that there is no difference between them. Aurora Borealis is the official and scientific name for the Northern Lights. The Northern Lights or the Aurora Borealis is a type of aurora that take place at the North Pole.
Why is Aurora Borealis Green?
The most common color seen in the Northern Lights is green. When the solar wind hits millions of oxygen atoms in the Earth’s atmosphere at the same time, it excites the oxygen atoms for a time and they decay back to their original state, when they emit the green hue we can see from the ground.
Where we can see aurora?
- Fairbanks, Alaska. In Fairbanks, Alaska, the sky glows with the aurora borealis. …
- Yellowknife, Canada. The aurora borealis spreads out above Prosperous Lake in Yellowknife, Canada. …
- Tromsø, Norway. …
- Northern Sweden and Finland. …
- Greenland. …
- Tasmania and New Zealand.
What does aurora symbolize?
