Nigel Nunn contributions
Nigel’s work with developing an understanding of absoluta, segregata, ultimata, and gravita is highly recommended and, seems to stand alone as a study aid. (If there is other work that you think should be included, please get in touch.) The paper on Orvonton represents the work that seems to have the most consensus supporting it amongst myself and other Urantia Book readers, who have academic and professional credentials in this area.
Written work with insightful illustrations
Science and Cosmology slides with script pdf’s. (The first three parts are outreach/introductory in nature and can be viewed on his YouTube channel.):
Part IV: Section I
Part IV: Section II
Part IV: Section III
The Massive Orvonton paper was published in April 2017, prior to the creation of the above slide presentation. It has a different overall organization to it. Material about absolute, segregate, ultimata, and gravita is discussed toward the end of this paper.
Video
Nigel’s YouTube channel has four videos on cosmology. The “Urantia Book cosmology” series runs a total of about 70 minutes. These slide presentation videos explain how matter is created, which involves developing an understanding of how The Urantia Book uses the coined words absoluta, segregata, ultimata, and gravita. (His channel also features videos of an outreach/introductory nature.)
Urantia Book cosmology: 4A – Foundations
Urantia Book cosmology: 4B1 – Mass & Matter
Urantia Book cosmology: 4B2 – Mass & Matter
Urantia Book cosmology: 4C – Exploding Dark Islands
Urantia Foundation 2016: In the first 60 minutes, this live presentation for the Foundation’s Science Symposium pretty much covers the same material found in Nigel’s “Urantia Book cosmology” series. There is also a 30-minute Q & A.