Sky's Up Summer 2016 - Page 42

the art of astronomy the art of astronomy Astrophotographer: John O’Neill Astrophotographer: John O’Neill Rosette Nebula The enormous Rosette Nebula is a standout feature of the Monoceros Constellation and is home to the open cluster NGC 2244. O’Neill captured this image with an Explore Scientific ED127FCD100 Air-Spaced Triplet and an SBIG ST-10 XME camera through narrow band filters of Ha, Oiii and Sii. Exposure times were five 600 second subs through each filter. Processing was done with CCD Stack and enhanced with Photoshop. Antennae Galaxies Opposing streams of dust, gas and stars trail off from this chaotic tangle between two spiral galaxies — NGC 4038 and NGC 4039 — in the Corvus Constellation. The pairing is one of the nearest and youngest examples of colliding galaxies, and their tumultuous crash will eventually end in the formation of one large elliptical galaxy. O’Neill took this mesmerizing image with an Astro Tech 10” RC ast rograph. Exposure times were five 600 second subs of LRGB. Jellyfish Nebula Iris Nebula IC 443, which is also known as the Jellyfish Nebula, is a supernova remnant that has two very different halves that exhibit different radii, structures and emissions. It is also likely home to a spinning neutron star, or pulsar. O’Neill captured this image with an Explore Scientific ED127-FCD100 Air-Spaced Triplet and an SBIG ST-10 XME camera through narrow band filters of Ha, Oiii and Sii. Exposure times were five 600 second subs through each filter. Processing was done with CCD Stack and enhanced with Photoshop. 42 The Iris Nebula is a beautiful reflection nebula blooming in the Cepheus Constellation that is closely associated with the open star cluster NGC 7023. The nebula’s “petals” span about six light years. The image was taken with an Astro Tech 12” RC astrograph. Exposure times were five 600 second subs of LRGB. Sky’s Up Sky’s Up 43