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The Greatest Dog Show on Earth 2 at The Mall at Cribbs Causeway Bristol.
All 67 sculptures from the Bristol trail are together for the first time.
The first successful narrowband tricolor image of Sivan 2?
Little is known about the nebula Sivan 2 (Siv 2) beyond it lying approximately 4500 light years away and having a high concentration Hydrogen. To my knowledge there are only a small number of existing images of this object. Of those, the earliest belongs to astrophysicist J.P. Sivan, who discovered it in 1974 (articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?bi...). This nebula also appears in the monochrome (Hα only) MDW Sky Survey (www.mdwskysurvey.org/). The other more targeted images, though groundbreaking in their own ways, are either only in broadband RGB or RGB + Hα; and as such they only show Siv 2's reddish haze.
Here, I've incorporated 12 hours of exposure time per three narrowband filters: the ionized gases Hydrogen-II (Hα), Sulphur-II (SII), and Oxygen-III (OIII). Of course, electronic color images are captured, stored, and rendered in red, green, and blue pixels, so in my version, the deep reds emitted by Hα are appropriately assigned to the red channel, the light emitted by SII to the green channel, and OIII emissions to blue. Combined they create a richly detailed and vivid RGB color image; but more importantly, this approach reveals cloud structures entirely missed in earlier photographs of Sivan 2. In fact, the strong blues demonstrate and abundance of OIII, which might indicate a specific evolution of the region as, perhaps, an ancient planetary nebula--but I will leave that hypothesis to the scientists.
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Uma parada de dois minutos na viagem de volta para contemplar mais um pôr-do-Sol no Norte do Paraná (Bandeirantes).
Day 2: Epworth
This is the boyhood home of John and Charles Wesley, built after fire destroyed the previous rectory.
Canon EOS 50D
Mitutoyo M Plan APO 10x 0.28 + Raynox 150
Tiempo exposición: 1,5" - ISO100
Canon Auto Bellows
Stacking
Nº de fotos: 165
Pasos: 5,41 µm
Magnificación aproximada: 10,37x