Aurora is a phenomenon that appears in the sky when charged particles from the sun collide with oxygen and nitrogen molecules in the atmosphere and ionize those molecules to make them glow. These lights are usually only visible at high latitudes, ranging from weak glows on the horizon to green and red undulating sheets that cover the sky.
Where can you see the aurora?
As the name implies, the aurora is Arctic, Northern Canada, Iceland, Greenland, Scandinavian countries, Russia, Alaska (and water in between). In general, the best place to see them is between latitudes 10 and 20 degrees. They happen technically all the time, but the sun’s rays during the day wash them away. NASA Provides useful tools Predicting northern light events, Earth To see them.
What does the aurora look like?
Auroras come in a variety of shapes and colors. The most common form is the common whitish “haze” or static glow just above the horizon. In more spectacular shows, the lights may appear directly above as they form a swirling wavy curtain and blue, green, and red sheets.Red — the rarest color — comes from the collision of highly energized particles. air In the upper atmosphere. Blue and green come from particles that hit nitrogen at lower levels in the atmosphere. According to NASA..
Why does it need to be cold for the aurora to occur?
Despite the common misconception, you don’t have to be cold to see the northern lights. However, they can only be seen at night, and at the northernmost latitudes, there is little or sometimes no sunlight. winter It’s been a few months, so you usually need to bring some layers to go looking for an aurora.
However, the aurora can also extend south. Method is as follows.Charged particles from the sun are called “solar winds” and they are always Solar system..
These charged particles get caught in Earth’s magnetic fieldPour some of them into the North Pole and some into the South Pole, where they hit our atmosphere and create a remarkable display.That is, the aurora matches the aurora, but it is much more difficult to visit. Antarctic, Aurora is much more common.
The solar wind can be much stronger as the sun circulates through more active stages. In addition, an event called a coronal mass ejection can cause the sun to emit a huge number of particles at one time. During these events, the aurora looks much brighter and can be seen further south, as overcharged particles overwhelm the normal funnel system of the Earth’s magnetic field. According to the Space Weather Archive..
Who first identified the aurora?
Throughout history people have seen and recorded the light of the north (and south), which is commonly characterized by many folklore traditions. For example, the Emperor Gengen of Chinese mythology was said to be the founder of Chinese culture, the ancestor of all Chinese, and the father of Aurora. For the Maori people of New Zealand, the southern light was a large torch in the sky illuminated by their ancestors when they sailed south, According to NASA..
Even Greeks who had never experienced the northern lights knew about the northern lights from travelers and merchants. They were described by the 4th century explorer Pytheas.
What is an aurora?
Another name for Aurora is Aurora, the name given to the effect by Galileo Galileo. “Aurora” refers to the goddess of the dawn of Rome, and “Aurora” is the Greek name for the north wind, so roughly speaking, it is “the dawn of the north”.
Galileo believed that the aurora was caused by the sunlight reflected by high altitude clouds, and Benjamin Franklin theorized that they were caused by the concentration of charges. In 1741, Swedish astronomer Olof Hiorter observed the compass needle rhythmically swinging back and forth in response to the swell of light, confirming that a magnetic field was also involved. However, it was not until the early 1900s that Norwegian scientist Kristian Birkeland first outlined the relationship between solar charged particles, atmospheric elements, and aurora shows. According to the British Antarctic Survey..
Do other planets get aurora?
Earth is not the only planet that hosts the aurora. Jupiter and Saturn have a stronger magnetic field than Earth, so they have a really impressive display. Even Uranus and Neptune, far from the Sun, host the aurora. Weak aurora have been detected on Mercury, Mars, and even Venus. The last point is noteworthy because Venus has no magnetic field. Therefore, the aurora of the planet appears as a patch diffused throughout the atmosphere.
Astronomers want to identify aurora outside the solar system. The most likely candidate is a brown dwarf, a body that is larger than a planet but smaller than a star. According to Joachim Saul, a geophysicist at the University of Cologne, the aurora of brown dwarfs is expected to be one trillion times brighter than the aurora of the Earth.
The aurora of the brown dwarf is so strong that Ultraviolet radiation (UV), which makes them relatively easy to detect. “Brown dwarfs are relatively cold objects,” Saur told Live Science. “Therefore, they do not emit the thermal UV rays that the Sun emits, for example. Therefore, brown dwarfs are ideal objects for looking for UV aurora outside the solar system, as competing UV emissions are not expected. “
- His book “Aurora: The ultimate hunting guide, ”Landscape photographer Leonardo Papella provides information on when and where to see the northern lights and how to take stunning pictures of the phenomenon. From the reviewers’ comments, this book seems to be perfect for beginners.
- PBS provides A fun, hands-on activity for kids with a visual step-by-step guide to creating aurora wall art.
- The University of Alaska Fairbanks Has “Aurora Forecast” resources with maps showing real-time activity across North America, Europe, the Arctic, Antarctica, and especially Alaska. This site also has information on when and where you can see the northern lights in general.
Northern Lights: What is Aurora?
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