Recent content by BrushyCanyon

Sun and moon azimuth and elevation for anywhere, any time. https://www.photoephemeris.com/

Looks like a porphyritic basalt. http://www.geo.mtu.edu/KeweenawGeoheritage/BlackLavas/Basalt_Textures.html Large phenocrysts are plagioclase feldspar, groundmass is typically very fine grained olivine and pyroxenes. BC

Have you tryed using dark frames to calibrate your light images for the CCD's dark current? Here's a good quick summary: https://diffractionlimited.com/help/maximdl/Dark_Frame_Calibration.htm Deep Sky Stacker can manage and stack your darks, and then process the dark stack with your light...

Do you use any plate solving programs, like Astrotortilla? This will let you precisely place your subs by matching your field with with referenced images.

Try DeepSkyStacker (64 bit). Free and very versatile. http://deepskystacker.free.fr/english/download.htm BC

Tom.G: Thanks for the link. As production gas wells age, pressure declines over time as good old P=nRT/V. V is the gas reservoir (finite), R and T don't change, hence P~n where n is the available moles of gasses. One expects the inverse to occur in injection wells as a finite volume accepts...

For the last dozen years or so I have been designing, permitting, drilling, operating and monitoring acid gas injection wells for oil&gas facilities. These wells safely and efficiently sequester waste CO2 and H2S from natural gas processing plants. The wells inject from 1 to over 15 million...