Flash Animation Credit & Copyright: Cary & Michael Huang
What does the universe look like on small scales? On large scales? Humanity is discovering that the universe is a very different place on every proportion that has been explored. For example, so far as we know, every tiny proton is exactly the same, but every huge galaxy is different. On more familiar scales, a small glass table top to a human is a vast plane of strange smoothness to a dust mite – possibly speckled with cell boulders. Not all scale lengths are well explored – what happens to the smallest mist droplets you sneeze, for example, is a topic of active research – and possibly useful to know to help stop the spread of disease. Theabove interactive flash animation, a modern version of the classic video Powers of Ten, is a new window to many of the known scales of our universe. By moving the scroll bar across the bottom, you can explore a diversity of sizes, while clicking on different items will bring up descriptive information.
The North America Nebula is large, covering an area of more than four times the size of the full moon; but its surface brightness is low, so normally it cannot be seen with the unaided eye. Binoculars and telescopes with large fields of view (approximately 3°) will show it as a foggy patch of light under sufficiently dark skies. However, using a UHC filter, which filters out some unwanted wavelengths of light, it can be seen without magnification under dark skies. Its prominent shape and especially its reddish color (from the hydrogen Hα emission line) show up only in photographs of the area.
Cygnus’s Wall is a term for the “Mexico and Central America part” of the North America Nebula. The Cygnus Wall exhibits the most concentratedstar formations in the nebula.
Imaging telescopes or lenses: Takahashi FSQ-106N Imaging cameras: Apogee U16M
Mounts: Sky-Watcher NEQ6
Software: photoshop, Maxim DL, PixInsight LE, CCDStack2
Filters: Astrodon 5nm Halpha SII OIII
Accessories: Bosma 80/500 guiding scope
Dates: June 1, 2012
Autor: Steve Yan
AstroPhotography of the day by SPONLI
12 January 2014
We select the best works of amateur astrophotographers with details of equipment, shooting processing etc.