Questions tagged [aurora]

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Why is Ganymede's aurora only visible in ultraviolet while Earth's is bright green and red?

GANYMEDE AURORAE NASA's Hubble Space Telescope observed a pair of auroral belts encircling the Jovian moon Ganymede. The belts were observed in ultraviolet light by the Space Telescope Imaging ...
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Why can you see both aurorae at the same time? [duplicate]

I wanted to know how it is possible to see both aurora borealis and aurora australis at the same time, since this video seems to suggest that it is possible. https://www.youtube.com/watch?v=...
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1answer
143 views

Could Ganymede's aurora be seen with the naked eye?

If one was orbiting in the Jovian system, as depicted in this artist conception, could the aurora be seen unassisted? Hubblesite-Illustration Credit: NASA, ESA, and G. Bacon (STScI)
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0answers
129 views

What is the science behind the polar light shapes

Is there any scientific explanation that causes polar lights (aurora borealis/australis) to have their unique shapes? Specifically: Rayed Arcs Dual Bands Corona (Images on NASA Pdf) This site (by ...
4
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1answer
7k views

Why do Auroras only occur in polar regions?

Why is it that Auroras only occur in the North and South poles. Why don't they occur in the equator or anywhere for that matter?
3
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1answer
87 views

Can cosmic rays alone produce noticeable aurorae in bodies far away from the Sun?

Aurorae are caused by energetic particles interacting with planetary atmospheres. Part of this flux comes from the Sun (solar wind) while the rest is cosmic radiation. My main question is: could a ...
2
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1answer
60 views

Auroras: is there any bump in frequency at certain times of night, or times of year?

I'm trying to find out if there is a range of times at night, and/or days during the year, in which the probability of seeing an aurora is higher than average. The aurora section of the British ...
3
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1answer
233 views

How come the northern and southern lights are the same?

Not an expert, hence the question. To my knowledge the magnetic field of the earth travels south to north. Wouldn't there be a bias on whether the charged particles causing the auroras are negatively ...