Observing with Street Lights

Observing with Street Lights
Dark sky sites not always necessary to see the Milky Way (This image was taken ouside of a B&B in Julian, CA)

Monday, May 25, 2015

Poor observing weather this week, but new free courses online at Coursera

The weather has been so cloudy and even a bit rainy that observing day or night has just not been possible.  There was just a couple of early evenings before the clouds moved back in to block any stars.  So we had a lot of clouds and unfortunately hardly any rain.  On one of those early evenings, astronomer's assistant, Danny, was completing his final round of the observatory grounds, when Jupiter poked through the clouds, but by the time I returned with my camera, the clouds covered up everything.  On the next evening, I went outside a few minutes earlier and found
that Jupiter, Venus, and even Saturn were visible between the clouds.  The clouds were rapidly filling in the sky and there was not enough time to setup the scope, but I did grab the camera and tripod and snapped a quick few images of Jupiter.  My sense was that the images were not going to be very good and I had just a few minutes before the clouds again covered everything up.
 Wow, what to do?  Help!  Can anybody remind us what it is like to look through a telescope?  Should we consider taking up the study of meteorology instead of astrophysics and astronomy?  At least the meteorologists can always look up and report whatever they see and can predict and all is fine.  No, that is not for me.    Should we do another post of some neat astrophysics type stuff?   I was considering what to do and resident astronomer, Peggy, reminded me that going into another astrophysics session might be too much.

Ok, ok, the interesting physics of momentum transfer and torque generation of planetary migration might be too much, in fact I'm still struggling to understand how it works.

So how about a new recommendation of astronomy type free classes that just started on www.Coursera.org.  I've participated In the first couple of so sessions and find they are pretty good courses.  You can still get going if you want.  They are not too difficult and they often have good videos and such too:

 (1).  Astro Tech:  The Science and Technology behind Astronomical Discovery, by University of  Edinburgh

 (2).  Imagining Other Earth's with astronomer David Spergel at Princeton University

 (3).  Origins :  Formation of the Universe, solar system, Earth and Life, by University of Copenhagen.  (This course is heavy into all of the nomenclature of geologic eras and epochs and the biological terms for microorganism, kingdoms, Clades and species.  A lot of new terms unless geology and such are your thing)

(4).  Previously, I recommended Mike Brown's course on The a Science of the Solar System from Caltech, but this course will finish next week.  You maybe can still view all the lectures if you're interested.

 So this Memorial Day weekend comes to a close without many viewing opportunities.  We did have a chance to finally see the movie "American Sniper".  I don't know why we were too busy to see it when the movie first came out, but seeing it this weekend was very good timing.  It was fantastic and fit together with the holiday theme.  We even attended a very moving VFW ceremony by the ocean in Dana Point honoring the soldiers who gave so much for our freedom.  Driving by the ocean is fun too.  Maybe studying oceanography is another option; it's always visible.  Or maybe just studying life on the beach while sipping a martini?

Oh well, so that is it for this week, except for one of the quick images of Jupiter that I mentioned earlier.  Saturn is about half the angular size of Jupiter and about 6 times dimmer and was fading into the clouds The Jupiter image pasted below was taken with a 300 mm telephoto on tripod and was made with a long exposure so that if any faint moons were in view they would be visible. 

Image of Jupiter with 300mm telephoto (Source: Palmia Observatory)

The image of Jupiter is overexposed, but at least one moon is visible.  So, you can see you don't really need a telescope to get at least a fuzzy image of the planets, but the detail from the scope with focal lengths of 900-2000 mm and good tracking to compensate for Earth's rotation can be much better.  I think I've had enough of this Gray May weather and look forward to June Gloom or at least clearer skies.  Unless, you're trying to get images of large constellations, a camera without the scope is just not the same.



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