Wednesday, September 30, 2009

Image of the Day: Mercury

This image of Mercury was taken yesterday, September 29th, 2009.


credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington

Here was Messenger flying past Earth in 2005: http://dwarmstr.blogspot.com/2006/04/messenger-departing-earth.html

And Mercury transiting across the face of the Sun from Earth: http://dwarmstr.blogspot.com/2006/11/mercury-transit.html

Thursday, September 24, 2009

Geiger counter current draw

This circuit connected to my geiger counter uses on average 80uA-- that's 0.08mA. On a click, it will bump up to 0.1mA. On startup just for a second it uses 3mA. At those rates, and with a standard 9V battery (at 650mAh), it would run about 9 months continously.

Saturday, September 12, 2009

Geiger counter offline

I've been having serial port problems with my geiger counter that has been running since December 1st, 2005, and so at the moment there is no reading.

Tuesday, August 04, 2009

Kepler

The Kepler mission is looking at this field of stars in Cygnus and Lyra. One of these stars will have an Earth-sized planet orbiting a star in the habitable zone.

Get this. This is the field. This is the image. Click on this 1000x1000 pixel image. Enjoy. Here is the medium resolution version. Enjoy a little more.

Now,
click on the full resolution. 11000x11000. 28 Megabytes. Now you see all the stars. Kepler is watching each one. All 4.5 million or so.


Kepler first light. Click on the image to make it bigger (and to start seeing the stars).

P.S. I originally wrote up the draft of this post two months ago and sat on it like I sit on everything. There is now a press conference coming up later in the week about early Kepler results.

Monday, July 27, 2009

ISS/Shuttle passes are over in Chicago

If you are searching for ISS and Shuttle passes over Chicago, tonight's was the last one for a while. If you are an early morning person, mid August will work; if not, early September is the next time you can see the ISS in Chicago.

Tuesday, July 07, 2009

ISS through a telescope

I just watched an awesome pass of the International Space Station over Chicago. I was able to catch it and follow* the ISS through a telescope at about 50x: the space station appeared as an eagle with orange solar panel wings, with a white body and a small white point source on the main axis. It was excellent, and that was at low power! Here was Tyrell's approach three years ago.

*follow in the sense of every twenty seconds moving a giant dome, followed by a german equatorial telescope in advance of the ISS and hoping I wasn't too slow.

Monday, July 06, 2009

Evening passes of the ISS visible in Chicago

There are a number of nice passes of the International Space Station visible in Chicago for the next two weeks. Take a look at Heavens-Above for the set for Chicago.

Here are the highlights for the evening passes, when they begin, how bright they are, and how high in the sky; click on the link above to get the full details. In some cases you will be able to see the ISS on successive orbits.

6 Jul -2.6 21:42:04 31
6 Jul -1.3 23:17:17 29
7 Jul -3.2 22:06:11 76
8 Jul -2.6 20:55:50 32
8 Jul -1.1 22:31:06 29
9 Jul -3.1 21:19:57 72
10 Jul -1.0 21:44:51 28
11 Jul -2.9 20:33:38 69
12 Jul -0.9 20:58:31 27

Thursday, July 02, 2009

Lunar Reconaissance Orbiter first images

The first test images are back from the LRO.





I've annotated a previous image of the moon with the location of the image: The orange markers are at the crater Hell E, which is listed in the press release as being just a few kilometers west of the image site. Hell E is listed as 10km across, so the images are just a touch to the right of that crater. Click on the image for a large original.



Credit for the LRO images are NASA/GSFC/ASU.

Monday, June 29, 2009

The intersection of the online/sharing culture, copyright, and photography

Seth Anderson at B12 Solipsism has an excellent series of posts (here, here, and here) about the intersection of the new online/sharing culture, copyright, and photography.

The first post is about the issue of copyright and fair use--many people fail to understand that "fair use" means you have already violated copyright, but you have a valid legal excuse. In photography, Seth points out that the ability to take an excerpt is potentially not possible, leaving every use of a photograph without permission a copyright violation.

The second post is a dust-up by a writer for the New York Times, who argued it was okay to print out a copy of any Flickr photograph and put it up in your private residence. This did not go over well with people who create--i.e., the photographers. While it may be ok for certain Creative Commons and Public Domain photographs, it is a violation of copyright to do that to a owned photograph. The legal question is, as I mentioned above, is this use considered Fair? You would be surprised at the muddled mess in the case law. A professor for instance lost a copyright case because he made personal copies of many science papers and kept them in his office. The turning distinction on that case was the amount of papers he made copies of that drove the copyright violation from "fair use" to a civil violation. Is one printed photo fair use? What if you decorate your whole apartment with them? What size can your print fairly? What about your friends' apartments?

The issues are completely muddy and complex--as a photographer, for instance, I feel I should be compensated for my work. Websites like say Chicagoist or Treehugger use flickr CC shared images to illustrate their stories. In the traditional media, the photographer would be compensated for their work, either by being employed or by a fee. This is not being done at all for most of the non-traditional sites on the internet. It is also a truth that these sites probably couldn't afford the going rate for photographs. Getting your image out for people to see for a photographer is a very important thing, but is it driving the image creation business out of a profession and into the hands of casual photographers? (The latin term amateur is perfect for here but misused--these photographers love what they do and are often just as good as a pro, but the amateurs are not paid).

You would be surprised what it costs to get the rights to every photograph in a magazine. Years ago I was paid once for an image covering less than 1/4 of a page in a small publication more than it costs for ten years of Flickr Pro. More recently, if someone can't get the image use for free, they move on to find another CC licensed image. At what point do I give away my images? For specific charity non-profits? For non-profits? The National Geographic Society is a non-profit, should they get images for free? For school textbooks? For medical school textbooks? There are no good answers, except I am sure there will be fewer pro photographers out there in the future.

There is also the new culture driven out of the Free Software/File Sharing culture where the belief is all content is free and the driving force behind creation of works is not the desire to make money; if you make money you have to find a way to do it selling something tangible, whether it be technical support, concerts, or physical items. This belief is moving beyond the software paradigm, is being fought in the music and movie industries (and being lost completely by the industries), and now is moving into books, photography, and other creative markets. Google was asking illustrators to create for free custom themes for the search engine. Google, a company with a 134 Billion market capitalization, was asking artists to work for free.

I benefit from many of these changes. I listen to music online (and I also still buy CDs, old fashioned me). I work in a field that utilizes free software every day. It is conflicting internally to know that somewhere an artisan may end their craft because they cannot afford to continue, because I chose the free option. I also know there are things I cannot do unless the cost is cheap enough for me to afford. For me, much work remains to allow the creative domains and artists the ability to ply their crafts in the future. I do not know how to get there from here.

Saturday, June 27, 2009

Venus AND Earth from Mars

I missed something in the last post--the image is Venus and Earth from Mars. Venus is the bright point in the center, and Earth is the faint object moving to the lower right of Venus.


This is from fredk at http://www.unmannedspaceflight.com/index.php?showtopic=6042&st=60&start=60