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Major new sections

Submitted by Kevin Jardine on 25 June, 2007 - 09:57

As promised many months ago, I've finally added two major new sections to the site.

First, there are 1280x1024 pixel detail maps that highlight 22 regions of the galaxy map, as described here. I tried creating 720x720 images as originally planned, but they did not seem large enough to cover the important regions. I hope that this will meet the needs of people who wanted more information together in single images.

Second, I have put up a full draft of my all-sky hydrogen-alpha commentary. The recent sensitive CCD hydrogen-alpha surveys have revolutionised our view of the night sky, and especially deep-sky nebulae. These results deserve to be better known. I've plotted the nebulae coordinates in the Galaxy Map database on top of Douglas Finkbeiner's all-sky hydrogen-alpha image. This reveals some amazing new information about many familiar nebulae.

The hydrogen-alpha commentary has a number of large images and is best viewed on a monitor with a resolution of 1280x1024 or higher. Over time I'll trim these images a bit to make this section easier to view on 1024x768 monitors as well.

New molecular cloud catalog.

Submitted by Kevin Jardine on 11 December, 2006 - 16:59

As explained on the sources page, I have added 625 molecular clouds from "The Equilibrium State of Molecular Regions in the Outer Galaxy". This makes the galaxy map much more detailed in the second quadrant.

The new map also fixes the display problem in the previous version - B class stars are now displayed again as balls rather than tiny crescents!

Sucking down the site

Submitted by Kevin Jardine on 4 December, 2006 - 15:06

According to my server logs, on Saturday 2 December 2006, between 9 am and 4 pm, someone in the Marseilles / Nice region of southern France used the HTTrack website copier to download most of this site.

I have deliberately not put copyright notices on the maps and other images on this site even though I have spent hundreds of hours creating them. I acknowledge the sources of the data and I think its fair to let anyone who wants to use images or other information from Galaxy Map to do so as long as they acknowledge the sources (including this site) as well.

However, I am unhappy about people using computer programs to suck down the entire site. First, because of the pressure this places on my server and the bandwidth costs I would face if several other people decided that they wanted copies of this site as well. But second, and more importantly, because this is a living site with continual updates. Someone in southern France now has an out-of-date copy of Galaxy Map that will get more and more out of date over time.

If you like this site and want the data I used to build it, just ask me. If you need special maps for a legitimate application, then just ask me and perhaps I can help.

But please don't make copies of this site without my permission.

If the person who did make the copy reads this (or if you know who did it), then I would appreciate it if you would comment below and tell me how you intend to use this information.

If you are not already registered, then you will need to take a minute to click on the link on the left to create an account. It only takes a minute.

Kevin Jardine

Upcoming changes

Submitted by Kevin Jardine on 24 November, 2006 - 15:13

A preview of new features coming soon:

I've overlaid the Sharpless, RCW, Gum and Westerhout catalogs on top of Douglas Finkbeiner's full sky hydrogen-alpha map. You will be able to zoom into the hydrogen-alpha image and arrive at about 35 subimages with commentary. This is a huge new section of the site and has taken weeks to put together.

There was a problem with the B-class star display in the last upload of the map (they are displayed as blue crescents instead of blue balls). I'll be fixing that and adding a new option to display large map windows (720x720 pixels as well as the current 360x360 pixels).


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