Topic: Space Photos This Week: Gravity Waves, Chicken Nebula

[sam]

Star trails create arches over the horizon in a long-exposure picture of the night sky taken from Mount Kilimanjaro in Tanzania.

http://news.nationalgeographic.com/news/2010/12/photogalleries/101230-space-pictures-shuttle-moon-125/?now=2010-12-30-00:01

[Rik]

I reckon someone set about the neg with a pair of dividers.

[sam]

 

[Rik]

 

[Clive]

You had me going about the gravity waves Sam.  Then I realised they were atmospheric gravity waves.    I love the photo of the circumpolar stars but just to show that an amateur can do even better, have a look at THIS PHOTO (top left and 3rd one over) taken by our good friend Dave Eagle.  He's even captured the spectral colours of the stars!  

[sam]

yes that star trail is cool.

And atmospheric g-waves, they are darn important and *much more interesting* 

Some nice pictures by Dave Eagle there.

[Simon]

Chicken Nebula - is that very spicy?   

[Clive]

And atmospheric g-waves, they are darn important and *much more interesting* 

My knowledge of atmospheric g-waves is zero.  I suspect they might be Lizzie's area.   

[Rik]

Chicken Nebula - is that very spicy?   

You'll get tikkad off for that one.

[Simon]

I'll have nan of that!

[Rik]

You're just trying to curry favour now.

[Simon]

I'll try not to be too saucy. 

[Rik]

I was only joshing you...

[sam]

My knowledge of atmospheric g-waves is zero.  I suspect they might be Lizzie's area.   

sort of

[Clive]

The word "chromosphere" provided a vital clue.