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Re: APOD: Red Aurora Over Australia (2012 Feb 01)
Posted: Fri Feb 03, 2012 4:52 pm
by bystander
wolf kotenberg wrote:Is it possible to " git " a picture like this for us in the northern latitutes ? Maybe a poster size ?
Contact: Alex Cherney (Terrastro)
Re: APOD: Red Aurora Over Australia (2012 Feb 01)
Posted: Sat Feb 04, 2012 4:44 am
by Scabulus
It is possible that it did glow green, but the sea level observer couldn't see it because of the curvature of the earth. In the summer, I can see thunderstorms a couple hundred miles away, but I only see the tops. In the time lapse video of the aurora, some green can be observed, but it is concentrated on the horizon. It is possible that during that time the aurora was closer, thus making the green visible to the observer.
Re: APOD: Red Aurora Over Australia (2012 Feb 01)
Posted: Sat Feb 04, 2012 5:33 am
by neufer
.
But I was thinking of a plan
To dye one's whiskers green,
And always use so large a fan
That they could not be seen.
So, having no reply to give
To what Scabulus said,
I cried, "Come, tell me how you live!"
And thumped him on the head.
Scabulus wrote:
It is possible that it did glow green, but the sea level observer couldn't see it because of the curvature of the earth. In the summer, I can see thunderstorms a couple hundred miles away, but I only see the tops. In the time lapse video of the aurora, some green can be observed, but it is concentrated on the horizon. It is possible that during that time the aurora was closer, thus making the green visible to the observer.
Re: APOD: Red Aurora Over Australia (2012 Feb 01)
Posted: Sat Feb 04, 2012 11:13 pm
by Flase
Of course you're also looking through a lot of atmosphere at the horizon. The Sun also appears red.
Re: APOD: Red Aurora Over Australia (2012 Feb 01)
Posted: Sat Feb 04, 2012 11:25 pm
by Flase
The video has a lot of satellites whizzing past. There might have also been one or two meteors.
We have a lot of space traffic up there, don't we? No wonder space junk is a concern.
Re: APOD: Red Aurora Over Australia (2012 Feb 01)
Posted: Sat Feb 04, 2012 11:34 pm
by Flase
Imagine the night sky in a couple of hundred years. Such a timelapse video would look like a web of white lines of satellite paths.
There might even be space stations big enough to see clearly with your naked eye.
Re: APOD: Red Aurora Over Australia (2012 Feb 01)
Posted: Sat Feb 04, 2012 11:35 pm
by Chris Peterson
Flase wrote:Of course you're also looking through a lot of atmosphere at the horizon. The Sun also appears red.
Yeah, but these colors are produced by narrow emission lines. No amount of atmosphere can make a narrow green line look red- all it can to is reduce the brightness.
Re: APOD: Red Aurora Over Australia (2012 Feb 01)
Posted: Sat Feb 04, 2012 11:38 pm
by Chris Peterson
Flase wrote:Imagine the night sky in a couple of hundred years. Such a timelapse video would look like a web of white lines of satellite paths.
There might even be space stations big enough to see clearly with your naked eye.
Unless we're back in the stone ages by then <g>.
Re: APOD: Red Aurora Over Australia (2012 Feb 01)
Posted: Sat Feb 04, 2012 11:47 pm
by wbd
terrastro wrote:It was my first visual Aurora and I was overwhelmed with emotions.
Alex Cherney
Awesome imagery Alex, congratulations!
Oh man, I wish I had have known about this. I've always wanted to see an aurora (it's #1 on my 'bucket list') and I only live a few kilometres away from Flinders in the outer SE suburbs of Melbourne!
I always thought I'd have to travel to very northern latitudes - Canada, Scandinavia, etc. - to see one, but here's one in my own backyard and I didn't even know about it.
Is there any way of knowing (weather permitting of course) when and where auroras might be visible and if so, are there any websites that publish such information (I have looked at
http://www.iceinspace.com.au a couple of times - would that be the best resource for such information)?
Cheers,
Rohan
Re: APOD: Red Aurora Over Australia (2012 Feb 01)
Posted: Sat Feb 04, 2012 11:57 pm
by Flase
Chris Peterson wrote:Flase wrote:Of course you're also looking through a lot of atmosphere at the horizon. The Sun also appears red.
Yeah, but these colors are produced by narrow emission lines. No amount of atmosphere can make a narrow green line look red- all it can to is reduce the brightness.
It probably did that, then, meaning any green was lost.
Re: APOD: Red Aurora Over Australia (2012 Feb 01)
Posted: Sun Feb 05, 2012 1:19 pm
by terrastro
wbd wrote:terrastro wrote:It was my first visual Aurora and I was overwhelmed with emotions.
Alex Cherney
Awesome imagery Alex, congratulations!
Oh man, I wish I had have known about this. I've always wanted to see an aurora (it's #1 on my 'bucket list') and I only live a few kilometres away from Flinders in the outer SE suburbs of Melbourne!
I always thought I'd have to travel to very northern latitudes - Canada, Scandinavia, etc. - to see one, but here's one in my own backyard and I didn't even know about it.
Is there any way of knowing (weather permitting of course) when and where auroras might be visible and if so, are there any websites that publish such information (I have looked at
http://www.iceinspace.com.au a couple of times - would that be the best resource for such information)?
Cheers,
Rohan
I use these two web pages as a guide:
http://www.swpc.noaa.gov/forecast.html
http://www.swpc.noaa.gov/pmap/OverviewS.html
Cheers,
Alex
Re: APOD: Red Aurora Over Australia (2012 Feb 01)
Posted: Sun Feb 05, 2012 8:57 pm
by wbd
Re: APOD: Red Aurora Over Australia (2012 Feb 01)
Posted: Tue Feb 07, 2012 11:41 am
by Madaya
Ahh, I get it, because I am at a higher latitude (~33 deg south), I mostly see the 'upper' red regions of the Aurora = solved.
Re: APOD: Red Aurora Over Australia (2012 Feb 01)
Posted: Thu May 17, 2012 5:55 pm
by jessy27
Rohan,
I grew up in Alaska and as far as I know there's no way to predict when an aurora borealis will happen except it
happens more often in the middle of winter when it's coldest. Green is most common but I have been there
when the whole sky was lit up with all the colors or the rainbow. awesome
