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)

Saturday, August 11, 2018

Smoky skies; The value of image stacking; Moana Kea; ModRing space station; HR color index and Python code; How beauty leads physics astray?

Greetings from Palmia Observatory

Well this week we were looking forward to the monthly OCA star party, but it has been cancelled due to the many forest fires, especially the Holy fire, now raging in southern California.  But we have other, mostly indoor, topics for discussion.

Tuesday, August 7, 2018

Hooray, finally got a Barlow lens in focus; Jupiter's rings visible in LiveView, but not in photographs

Greetings from Palmia Observatory


Well, it finally happened this week, with Mars and Jupiter so bright in the night sky, I just had to try out the old Barlow lens to getter a better view.  Readers will recall that the 600mm images in the August 3 post were just fuzzy balls of light, so this week it was time to bust out the 2.5x Barlow and try to get it to work with the 80mm refractor telescope, which should result in an equivalent focal length of 1400mm.

Friday, August 3, 2018

Autoguiding discussion with PHD2 software; Acceleration mechanisms for cosmic rays; Images of Mars and Jupiter; Ruby's question about wet concrete?


Greetings from Palmia Observatory

Well, this week we attended a discussion on autoguiding and also found time to get some fuzzy DSLR images of Mars and Jupiter and also discuss a little bit more about cosmic ray acceleration.  But first we should describe one easy way to observe the effects of atmospheric refraction.

Wednesday, August 1, 2018

How can the atmospheric refraction effects, which makes objects close to the horizon appear higher in the sky, be measured?

Greetings from Palmia Observatory

We know that making astronomical observations of targets close to the horizon can be affected by atmospheric effects of reddening, extinction and refraction.  Previous posts have addressed some of these effects, and this post asks the question: How might atmospheric refraction be measured?

Sunday, July 29, 2018

Gamma ray spectrum and Crab Nebula; Finally got better focus on IR camera; More photos from our SOFIA tour

Greetings from Palmia Observatory


Well we have been so busy this week that we have missed some of the good solar system observing opportunities, like the large gas giants, and Mars, and a total lunar eclipse.  Hope the rest of you are doing a little better.  So to make up for that, let's stay inside and do more astrophysics!