Questions tagged [aurora]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
10
votes
1answer
524 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 ...
3
votes
1answer
37 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 ...
8
votes
1answer
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 ...
2
votes
1answer
170 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)
3
votes
0answers
151 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
1answer
9k 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
votes
1answer
91 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
votes
1answer
61 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
1answer
241 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 ...