Daily Archives: January 19, 2014

Spiral Galaxies in Collision

Image Credit: Debra Meloy Elmegreen (Vassar College) et al.,  & the Hubble Heritage Team (AURA/STScI/NASA)

Billions of years from now, only one of these two galaxies will remain. Until then, spiral galaxies NGC 2207 and IC 2163 will slowly pull each other apart, creating tides of matter, sheets of shocked gas, lanes of dark dust, bursts of star formation, and streams of cast-away stars. Astronomers predict that NGC 2207, the larger galaxy on the left, will eventually incorporate IC 2163, the smaller galaxy on the right. In the mostrecent encounter that about peaked 40 million years ago, the smaller galaxy is swinging around counter-clockwise, and is now slightly behind the larger galaxy. The space between stars is so vast that when galaxies collide, the stars in them usually do not collide.

NASA APOD 19-Jan-2014

Sharpless 308 in Canis Major

5fbb1380c39acdf19e3554509cd417d3.1824x0_q100_watermark_watermark_opacity-20_watermark_position-4_watermark_text-Copyright Stefan Westphal
Sharpless 308 (also known as Sh2-308, S 308 or RCW 11) is a cosmic bubble of nearly 60 light-years across, located some 5,200 light-years from Earth in the constellation of Canis Major, the Greater Dog. Known as a Wolf-Rayet bubble, it has an age of about 70,000 years and an expansion velocity of about 60 kilometers per second.

Imaging telescopes or lenses: William Optics FLT 132/925
Imaging cameras: Artemis Atik 383L+
Mounts: 10 Micron GM2000 QCI
Guiding telescopes or lenses: William Optics 80 II ed triplet APO
Guiding cameras: M-Gen Guiding Kamera
Focal reducers: Tele Vue 0.8x Focal Reducer
Software: Deep Sky Stacker 3.3.3 Beta 51 DSS DeepSkyStacker, Fitswork4, Adobe Photoshop CS2
Filters: Baader Planetarium 36mm Luminance, Baader Planetarium 36mm Red, Baader Planetarium 36mm Green, Baader Planetarium 36mm Blue
Accessories: Lacerta MGEN2
Dates: Dec. 5, 2013
Locations: Sahara Sky, Marokko
Baader Planetarium 36mm Blue: 6×600″ -20C bin 1×1
Baader Planetarium 36mm Green: 5×600″ -20C bin 1×1
Baader Planetarium 36mm Luminance: 8×600″ -20C bin 1×1
Baader Planetarium 36mm Red: 5×600″ -20C bin 1×1
Integration: 4.0 hours
Darks: ~14
Flats: ~27

Autor: Stefan Westphal

AstroPhotography of the day by SPONLI

19 January 2014

We select the best works of amateur astrophotographers with details of equipment, shooting processing etc.