Amateur astronomy equipment, techniques, info, etc

Archive for May, 2013

Ring Nebula Is More Like A Jelly Doughnut, NASA Says

Ring Nebula Is More Like A Jelly Doughnut, NASA Says

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> http://www.npr.org/blogs/thetwo-way/2013/05/24/186489695/ring-nebula-…

> http://media.npr.org/assets/img/2013/05/24/nebula_wide-a3344295066f67…

> The Ring Nebula, whose iconic shape and large size make it a favorite

> of amateur astronomers, can now be seen in new detail, after NASA’s

> Hubble Space Telescope captured a sharp image of the nebula.

> Researchers say the new clarity reveals details that were previously

> unseen, and a structure that’s more complex than scientists had

> believed.

> "The nebula is not like a bagel, but rather, it’s like a jelly

> doughnut, because it’s filled with material in the middle," says C.

> Robert O’Dell of Vanderbilt University, who leads a team of

> researchers studying the Ring Nebula. They combined Hubble’s

> visible-light images with infrared data from telescopes on Earth.

.
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significant auroral activity

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> Solar event on the west limb of the sun appears to have been large

> enough to produce significant auroral activity on the evening of the

> 25th for viewers in southern Canada and the northern tier of the

> United States.  The weather looks overcast for most of the region,

> but there may be clearing enough tonight. >

> Watch the short term aurora forecast at http://www.gi.alaska.edu/AuroraForecast

> —————————————————————-

> This message was sent using IMP, the Internet Messaging Program.

> _______________________________________________

> gse-aa mailing list

> gse…@gi.alaska.edu

> http://www2.gi.alaska.edu/mailman/listinfo/gse-aa

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Geomagnetic K-index of 5 expected — Issue Time: 2013 May 25 1712 UTC

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> Space Weather Message Code: WARK05

> Serial Number: 843

> Issue Time: 2013 May 25 1712 UTC

> WARNING: Geomagnetic K-index of 5 expected

> Valid From: 2013 May 25 1712 UTC

> Valid To: 2013 May 25 2300 UTC

> Warning Condition: Onset

> NOAA Scale: G1 – Minor

> NOAA Space Weather Scale descriptions can be found at

> www.swpc.noaa.gov/NOAAscales

> Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.

> Induced Currents – Weak power grid fluctuations can occur.

> Spacecraft – Minor impact on satellite operations possible.

> Aurora – Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

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Optics: Statistics light the way

Optics: Statistics light the way

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> http://phys.org/news/2013-05-optics-statistics.html

> Krivitsky and his team trapped a photoreceptor cell from a frog on

> the end of a suction pipette. Then they fired green-light laser

> pulses at the cell through an optical fiber. The same device could

> also imitate a thermal light source when they placed a rotating disk

> of ground glass and an aperture into the beam path.

> They observed that rhodopsin molecules in the cell absorbed the

> incoming photons, which generated an ion current. The researchers

> amplified and measured this current as the average number of photons

> in each light pulse increased. They noticed a much sharper increase

> in detected current for the laser light than the pseudothermal

> pulses. This is because, while the average photon number is the same,

> an individual pseudothermal pulse was more likely to have a low

> number of photons. The photon distribution of the laser pulses, on

> the other hand, was much narrower.

> The two types of photon emitters investigated in these experiments

> are examples of ‘classical’ light sources. "The next step is to

> investigate quantum light, such as pulses with a fixed number of

> photons," notes Krivitsky.

> Read more at: http://phys.org/news/2013-05-optics-statistics.html#jCp

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Vast Resource

I have created astronomy programs in Java Script.

Azimuth Altitude calculator is also a library of bright stars, nearest stars, and messier objects. Easily loads over 200 objects with a single click after entering longitude and latitude, another click to view in 3D.

J-tarium is a JS planetarium able to calculate most views in only seconds, sometimes less. This was achieved by using vector catalogs, eliminating  trigonometric calculation time. Because a vector is also a distance, THIS planetarium has "Stargate" ability to move the camera anywhere in the local system.

Being in Java Script means all the math required for a camera in 3D space is viewable for educational purposes.

Years went into this work that now needs a host and a home. Any suggestions?

http://home.earthlink.net/~beta-quadrant/titlepacif_001.jpg

http://home.earthlink.net/~beta-quadrant/jtarium.jpg

http://home.earthlink.net/~beta-quadrant/azalt.jpg

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Re: Dawkins defines natural selection

On May 26, 8:44 pm, Burkhard <b.scha…@ed.ac.uk> wrote:

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> On May 27, 1:26 am, solar penguin <solar.peng…@googlemail.com>

> wrote:

> > On Sun, 26 May 2013 12:05:23 -0700, backspace wrote:

> > > …….."Circular argument: A sentence or argument that restates rather

> > > than proves. Thus, it goes in a circle: ‘President Reagan was a great

> > > communicator because he had the knack of talking effectively to the

> > > people.’ The terms in the beginning of the sentence (great communicator)

> > > and the end of the sentence (talking effectively) are interchangeable."

> > > (Stephen Reid, The Prentice Hall Guide for College Writers, 5th ed.,

> > > 2000)……

> > I’m afraid Stephen Reid is mistaken. Great communicators don’t have to

> > communicate by talking. They could do it by writing, or painting, or

> > singing, etc. Most of them do use talking, but it’s not strictly

> > necessary, so the terms _aren’t_ interchangeable.

> Indeed, though I would cut Reid some slack here. It is clear what he

> wants to say, though the example is problematic. There is however

> potentially a much deeper issue involved – food examples are hard to

> find. Which is why quite a number of logicians have given up on the

> whole concept of synonymity – though linguists keep using the term

> in a more or less lose fashion , meaning something like " very

> similar" rather than "identical in meaning" with it.

Burkhard, has slapped Jonathan, silly. He kicked him in the balls! He

has hairy balls! HE HAS A HUGE ASS! BE IT, HIUHNUJHHUHUKJBIKHNOIHIOH

PYTHON!

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Where to watch Aurora in Canada

In the past I have seen aurora from Ohio, Pennsylvania, New York and Vermont but it is not common there. So I am planning on an Aurora watching vacation to Canada in the Fall, probably late September/early October.   Most likely Eastern Canada I think as Auroral activity seems to extend to lower latitudes in Eastern North American than it does in the Western Part.

Obviously we would want to observe from a dark sky location, and so were wondering about parks that have cabins for rent.  Any recommendations?

Are there any Canadian Astronomy Clubs members reading this who can give some advice?  Maybe some Canadian Clubs have dark sky locations they share with visitors?

FF

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LIZARDS on Mars!!! :)

Maybe a fossil?  :)

http://www.dailymail.co.uk/news/article-2332516/Sharp-eyed-blogger-ex…

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Geomagnetic Storm Category G1 Predicted — Issue Time: 2013 May 30 1520 UTC

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> Space Weather Message Code: WATA20

> Serial Number: 523

> Issue Time: 2013 May 30 1520 UTC

> WATCH: Geomagnetic Storm Category G1 Predicted

> Highest Storm Level Predicted by Day:

> May 31:  None (Below G1)   Jun 01:  G1 (Minor)   Jun 02:  None (Below G1)

> THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

> NOAA Space Weather Scale descriptions can be found at

> www.swpc.noaa.gov/NOAAscales

> Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.

> Induced Currents – Weak power grid fluctuations can occur.

> Spacecraft – Minor impact on satellite operations possible.

> Aurora – Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

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Astronauts going to Mars would be irradiated too much

http://www.bbc.co.uk/news/science-environment-22718672

There is only one choice;  DUMP the S—- chemical rockets, tell the

environmentalists to GO TO HELL and build Project Orion.  It is the

only spaceship/travel method that would be fast enough and shielded

enough (because of the massive carrying capacity of the drive system)

to allow any kind of longer-term space flights, and colonization.

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