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Questions tagged [aurora]

Questions of natural light display on planets with atmosphere predominantly in their high latitudes caused by charged particles from the respective star.

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What causes aurora at lower latitudes during solar storms?

During solar storms, aurora can be viewed a lower latitudes in regions which normally cannot see aurora. What physically allows for the aurora to be seen at lower latitudes? Is it the influx of energy ...
3 votes
0 answers
82 views

Low Latitude Aurora

It's been in the news recently that the aurora was visible in Europe at much lower latitudes than usual, ie, not just in Scandinavia but as far south as the Adriatic. Sadly, I didn't find out about it ...
7 votes
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327 views

Have auroras on Titan been observed yet?

After reading the very insightful introduction to auroras on other planets I started digging and found various questions and some answers here on the same topic, see below. What I did not figure out ...
5 votes
0 answers
69 views

What are the typical emissions of Jupiter's Aurorae?

I'm looking for some solid measurements of the full range of emissions from the Aurorae on Jupiter. I've found partial sets of data in the past which are most easily summarized here. As you can see, ...
0 votes
2 answers
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I spotted a very small, quite foggy but uniform aurora-type looking green light in the sky, but I live near the equator [duplicate]

I live in India, from there, a few years(2016) ago, I had spotted quite bright, uniformly(didn't change the shape while moving) crystal shaped green light very slowly moving above the clouds during ...
12 votes
1 answer
914 views

Are there auroras on Mercury?

Auroras on Earth are caused by interactions between the solar wind and the magnetosphere. I've also seen a few pictures of auroras on Jupiter and Saturn. Mercury has a global magnetic field. Does it ...
4 votes
1 answer
66 views

What is the difference between aurorae and electroglow?

One of the discoveries of Voyager 2 at Uranus was a phenomenon called "electroglow", which as I understand it is related to charged particles interacting with the atmosphere that cause the ...
9 votes
1 answer
1k views

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 ...
3 votes
1 answer
321 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)
4 votes
0 answers
193 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 ...
5 votes
1 answer
19k 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?
2 votes
1 answer
81 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 votes
1 answer
168 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 ...
3 votes
1 answer
280 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 ...