Why the sky is dark at night, possibly an answer.

kovil · Post by **kovil** » Thu Feb 08, 2007 2:46 am

It was on another topic the discussion got started on why the sky is dark at night, classic arguments and gut reactions aside; here is some proof of why. This photo is a 100 hour exposure by an xray satellite observatory, and shows very distant galaxies etc, that are xray sources. Even at extreme distance the photo is more empty space than emission source covered.

http://xmm.vilspa.esa.es/external/xmm_s ... 40601a.jpg
(this link now repaired thanks to the edit button

It is surprising how many sources show, like the Hubble deep field photo, this was taken of visibly empty sky.

Viva la Cosmos !

ckam · Post by **ckam** » Thu Feb 08, 2007 8:23 am

Apache/1.3.27 Server at xmm.vilspa.esa.es wrote:Not Found
The requested URL /external/xmm_science/gallery/images/XDS_20040601a.jpg was not found on this server.

BMAONE23 · Post by **BMAONE23** » Thu Feb 08, 2007 1:46 pm

Kovil,
your link didn't work, is this the image you were refering to?
http://xmm.vilspa.esa.es/external/xmm_s ... 40601a.jpg

kovil · Post by **kovil** » Thu Feb 08, 2007 4:36 pm

Thanks , BMAONE23, that's it.

Even tho I checked my typing twice, the XSDS was XDS , thus the fault.

I ended up in the wrong galaxy from a typographical error !

harry · Post by **harry** » Fri Feb 09, 2007 7:19 am

Hello All

In a galaxy far far away.

This image is just a pin point, imagine the full affect (effect if you choose)
of all the pin points.

Now imagine if you had a better telescope and focused for a million hours.

[/quote]