“I believe alien life is quite common in the universe, although intelligent life is less so. Some say it has yet to appear on planet Earth”. Stephen Hawking
Copyright © 2020 by Dennis Roscoe, Ph.D.         Last Update was March 18, 2021                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

About Dennis Roscoe

Dr.  Dennis Roscoe holds a Bachelor and Masters Degree in Electrical Engineering and a Ph.D. in Neurophysiology from the University of Arizona, School of Medicine. He has been a Professor of Biomedical Engineering at Case Western Reserve University, Cleveland, Ohio and a Professor of Neurology at the University of Wisconsin Madison, College of Medicine.  Dr. Roscoe has combined his engineering and medical background to design and develop medical devices and has been the founder and president of two medical device companies.  For the last ten years, he has also developed a passion for astrophotography and currently owns and operates his own personal observatory. He specializes in the imaging of deep space objects such as nebulae and in May 2014 his images were published in TIME.com.   He is currently an instructor at the University of Wisconsin Waukesha and teaching astrophotography and astronomy.  Dr. Roscoe resides in his country home just northwest of Genesee Depot, Wisconsin. Dr. Roscoe has explored many aspects of the cosmos, but has a particular love for nebulae.  Nebulae are not only remnants of dead or exploded stars, but the birth place and nursery for new stars.  They are a cosmic recycling plant to which we can trace the origins of the atoms which make up our very existence. As Carl Sagan so appropriately stated; “We are all star stuff”.  Our own sun was once formed in a nebula not all that different from the ones that Dr. Roscoe photographs.  Every time I photograph a nebula I am reminded how insignificant we really are in the big picture of the universe.  Through a deeper understanding of the cosmos, we can one day dispel all of our superstitions and find our true place in the universe.



About the Images

The Gallery images were formed by an astrophotography technique known as Narrow Band Imaging with the use of the Hubble color palette. Typically, eight 30 min exposures, called sub-frames, are taken for each of three different narrow band filters. These filters pass ionized sulfur, hydrogen, and oxygen wavelengths to form the red, green and blue components of the color image. In total, it takes about 12 hours of imaging time to form a final color image. The sub-frame images were taken through a 130mm refractor telescope with an 8 mega pixel astronomical camera. Formerly, pre-processing was done with Nebulosity 4.0 to remove noise from the sub-frame images and then additional post-processing of the master color image with Photoshop. Currently, I am using PixInsight to do allpre and post processing.