This is Dr. Chad Davies's Typepad Profile.
Join Typepad and start following Dr. Chad Davies's activity
Join Now!
Already a member? Sign In
Dr. Chad Davies
Barnesville, GA
Husband, Christian, Educator, Astronomer, Cyclist, Amateur Philosopher and Historian, Beer Lover, Dog Owner
Interests: Physics, Astronomy, Cycling, History, Philosophy, Theology, Cooking
Recent Activity
Image
In 1914, Harlow Shapley moved to work at the Mt. Wilson Observatory. Over the course of five years, using the 60 inch reflector there, he observed the 75 visible globular clusters and developed a whole new model of the Milky Way Galaxy and our place in it. Direct Download Link... Continue reading
Posted Aug 6, 2017 at The Scientific Odyssey
Image
In our final episode of this mini-series on the women who worked at the Harvard College Observatory, we dive into the life of Cecilia Payne-Gaposchkin from her time at Cambridge University to her life in Cambridge, Massachusetts. Direct Download Link Apple Podcasts Link Continue reading
Posted Aug 1, 2017 at The Scientific Odyssey
Image
In this episode we take a look at the history of the development of the metric system out of the French Revolution and the roles of Jerome Lalande, Pierre Mechain and Jean Baptiste Delambre in conducting the Meridian Survey of 1792. Direct Download Link Apple Podcast Link Borda Repeating Circle... Continue reading
Posted Jul 24, 2017 at The Scientific Odyssey
Image
Annie Jump Cannon and Henrietta Swan Leavitt would form the core of the calculation staff at the Harvard College Observatory for nearly two decades. They oversaw the transition of the Observatory from the directorship of Edward Charles Pickering to Harlow Shapley and established the dominant classification systems and physical laws... Continue reading
Posted Jul 19, 2017 at The Scientific Odyssey
Image
In the first part of a multi episode series, we look at the lives of two very different women. Williamina Fleming and Antonia Maury both made significant contributions to the field of stellar spectroscopy by developing classification systems to better understand the light from stars but their different backgrounds and... Continue reading
Posted Jul 10, 2017 at The Scientific Odyssey
Image
This week we take an in-depth look at the work done at the Harvard College Observatory on cataloging and classifying variable stars under the direction of Charles Edward Pickering. We examine the contributions of Williamina Fleming, Annie Jump Cannon and Henrietta Swan Leavitt that resulted in the the period-luminosity relationship,... Continue reading
Posted Jul 3, 2017 at The Scientific Odyssey
Image
This week we take a look at weather forecasting after the Navigator's trip to Boulder, CO for the NASA Social event covering the launch of the JPSS-1 polar orbiting satellite. We discuss a brief history of weather forecasting, the roles of both geosynchronous and polar orbiting satellites in that endeavor... Continue reading
Posted Jun 25, 2017 at The Scientific Odyssey
Image
In the years between 1905 and 1911, the astronomer Ejnar Hertzsprung and Henry Russell Norris developed a way of representing the accumulating astronomical and astrophysical data on stars that revealed the presence of a relationship between a stars brightness and its temperature. This Hertzsprung-Russell or H-R Diagram would come to... Continue reading
Posted Jun 16, 2017 at The Scientific Odyssey
Image
This week, with the help of steampunk attired lady and gentleman bugs, we take a look at the Doppler effect. We use water waves, sound and light to examine the consequences of what happens with the observer of a wave is moving with respect to the wave's source. We also... Continue reading
Posted Jun 5, 2017 at The Scientific Odyssey
Image
This week we look at the spectral classification work of Antonia Maury and Annie Jump Cannon at the Harvard College Observatory. Direct Download Link Apple Podcasts Link Antonia Maury Annie Jump Cannon Continue reading
Posted Jun 1, 2017 at The Scientific Odyssey
Image
In this week's episode we look at the early work of the Harvard College Observatory under the direction of Edward Charles Pickering. We discuss his three big research initiatives: the visual photometric survey of stars, the All-Sky Survey and Catalogue and the Draper Memorial Catalogue that catalogued and classified the... Continue reading
Posted May 29, 2017 at The Scientific Odyssey
Image
When Kirchhoff and Bunsen unlocked elemental spectra, they opened a new avenue of astrophysical investigation. This work work was originally done by the quartet of Lewis Rutherfurd, Astronomer Royal George Airy, Father Angelo Secchi and William Huggins. This work would lead to advances by Hermann Carl Vogel and Norman Lockyer... Continue reading
Posted May 15, 2017 at The Scientific Odyssey
Image
In 1861, Gustav Kirchhoff published the astonishing results that he could, merely by examining the light received from the Sun, determine what elements it was made from. One this episode, we'll trace the scientific investigation of the nature of light from Isaac Newton through Joseph Fraunhofer to the work of... Continue reading
Posted May 8, 2017 at The Scientific Odyssey
Image
In this episode we look at the various methods to determine the distances to the stars including Christiaan Huygens' comparison method, Robert Hooke's zenith telescope and Wilhelm Struve's and Freidrich Bessel's telescopic measurements. We also review the various ideas as to the distributions of these stars as advanced by Isaac... Continue reading
Posted May 1, 2017 at The Scientific Odyssey
Image
In this episode we examine the fates of Phaeton, Vulcan and Pluto as they were thought of by Olbers, Le Verrier and Clyde Tombaugh. We also examine the observations of James Craig Watson, introduce William Henry Pickering and follow the work of Percival Lowell. Direct Download Link iTunes Link Diagram... Continue reading
Posted Apr 23, 2017 at The Scientific Odyssey
Image
In 1782, William Herschel entered the service of his Royal Majesty, King George III of the United Kingdom. Over the next 20 years, he, along with his brother Alexander, would build hundred of telescopes including the largest research instruments in Europe as well as create the largest catalogue of deep... Continue reading
Posted Apr 17, 2017 at The Scientific Odyssey
Image
William Herschel was a Hanoverian musician turned British astronomer. In this episode we look at his journey from military band oboist to the court astronomer of King George III. Along the way we look at his work as a composer and orchestral director, his entry into the field of astronomical... Continue reading
Posted Apr 9, 2017 at The Scientific Odyssey
Image
This week we look at the work of William Herschel (the discovery of Uranus), Giuseppe Piazzi (the discovery of Ceres), Heinrich Olbers (the discovery of Pallas), Urbain Le Verrier (the discovery of Neptune), Alexis Bouvard and Johann Galle (the discovery of Neptune) as they discovered new worlds in a Newtonian... Continue reading
Posted Apr 2, 2017 at The Scientific Odyssey
Image
Following the publication of Newton's Principia, the extended process of adoption began. In this episode, we look at what barriers there were to Newton's ideas and how they were overcome. We also look at the acceptance of heliocentricism and the reworking of Newton's mathematical formalism up through the work of... Continue reading
Posted Mar 26, 2017 at The Scientific Odyssey
Image
In our second episode devoted to the life and work of Edmond Halley, we recount his three voyages aboard the Paramour to create a map of magnetic variation, his predictions on the return of the comet of 1682, now known as Halley's Comet, his discovery of the proper motion of... Continue reading
Posted Mar 19, 2017 at The Scientific Odyssey
Image
This week we look at the earlier career of astronomer, mathematician and natural philosopher Edmond Halley. We look at the first part of his career but through about 1693 including his trips to St. Helena, Danzig and Paris. We also look at his ideas on measuring the size of the... Continue reading
Posted Mar 14, 2017 at The Scientific Odyssey
Image
In this episode we finally conclude our biographical sketch of Isaac Newton by looking at his life in the years following the publication of the Principia. We look at his political activities following the Glorious Revolution, his friendship with John Locke, the circle of young followers the gathered around him... Continue reading
Posted Mar 6, 2017 at The Scientific Odyssey
Image
In this impromptu and unscripted episode, I talk about the recent announcement of the discovery of seven earth-like worlds orbiting a nearby class M star now named TRAPPIST-1 after the telescope used to make the initial discovery. I look at how exoplanets are discovered, the specifics of this discovery, what... Continue reading
Posted Mar 2, 2017 at The Scientific Odyssey
Image
In 1687, Issac Newton, through the hard work and auspices of Edmund Halley, published the greatest scientific work of all time. In this episode we examine the events that led to the book's creation including Newton's correspondences with Robert Hooke and John Flamsteed. We also spend a bit of time... Continue reading
Posted Feb 26, 2017 at The Scientific Odyssey
Image
This week we look at Isaac Newton's work in the area of alchemy and examine his heretical religious views centered on the ancient variant doctrine of Arianism. Direct Download Link iTunes Link Newton's Representation of the Philosopher's Stone Continue reading
Posted Feb 12, 2017 at The Scientific Odyssey