Uploaded June 2018 | Updated September 2026, 1 hour ago
(Scroll down for full index and links) Just an informal, one-hour conversation with an assorted panel, because my regularly-scheduled guest couldn't make it. ImRic joined and helped with the imagery, followed by Blue Marble from England, and Space Man with some great questions. I also responded to questions in the chat, especially from Cosmic Surfer.
0:00 just small talk, inviting folks on, ad hoc. 2:35 ImRic joins (all the fun drains from the room) 7:00 Blue Marble joins. 12:25 Angular Reduction in Size at distance. 16:45 Warehouse floor flat? 20:00 Angular momentum of Earth? 25:10 Parallel sun rays, circle of sight? 29:25 Space Man joins. 31:00 Scientist (Jan Koziar) who claims measurement of the Earth is off. 31:50 ...back to Angular Size. 33:10 testing the idea that a light will disappear if it gets far enough away. 33:45 more on Jan Koziar, “there’s something wrong with the measurement of the Earth.” (video link below) 34:35 Science vs. Crackpot science. 36:15 back to testing how far you can see a light source with the naked eye. 40:40 how can a distant sun warm us, when space is cold? 43:00 Why does horizon always “rise to eye level” on a globe? 45:00 using a square tube water level (video link below) 45:55 how high to see curved horizon? 47:20 Blue Marble: Fisheye lens doesn’t indicate fishy data. Space Man: Dog cam footage (video link below) 48:40 “Hotspot” in high altitude footage. 50:05 Countering the GoPro effect (horizon crossing center frame) 51:18 Hotspot in photography, vs in high altitude footage? 52:56 Blue Marble made a great point: if you move around and see a reflection, the reflection will move also. Not so with hotspot. 53:25 What should I do to see curvature? 55:00 Alfred Wallace Bedford Level test. 56:25 closing comments.
Videos Mentioned:
Description of Jan Koziar’s thoughts on the measurement of the Earth being off. youtube.com/watch?v=dLP_GvIfCN0 (22m40s)
Square tube water level: youtube.com/watch?v=NqOQ_BCtqUI (1m25s)
Dogcam high altitude balloon: youtube.com/watch?v=qAPXZgJjv7A
Channel Links:
Cosmic Surfer: youtube.com/channel/UC7bfLk4pg_hgMwT6z6uxHkg
Space Man: youtube.com/channel/UC_O5cmqJNv-TnIadRrhEkbg
ImRic: youtube.com/channel/UCW1SSSpq76COTvdN5CHI0dA
Blue Marble: youtube.com/channel/UCuQPbSSSGG1fE60MahpRZKA
(Scroll down for full index and links) Just an informal, one-hour conversation with an assorted panel, because my regularly-scheduled guest couldn't make it. ImRic joined and helped with the imagery, followed by Blue Marble from England, and Space Man with some great questions. I also responded to questions in the chat, especially from Cosmic Surfer.
0:00 just small talk, inviting folks on, ad hoc. 2:35 ImRic joins (all the fun drains from the room) 7:00 Blue Marble joins. 12:25 Angular Reduction in Size at distance. 16:45 Warehouse floor flat? 20:00 Angular momentum of Earth? 25:10 Parallel sun rays, circle of sight? 29:25 Space Man joins. 31:00 Scientist (Jan Koziar) who claims measurement of the Earth is off. 31:50 ...back to Angular Size. 33:10 testing the idea that a light will disappear if it gets far enough away. 33:45 more on Jan Koziar, “there’s something wrong with the measurement of the Earth.” (video link below) 34:35 Science vs. Crackpot science. 36:15 back to testing how far you can see a light source with the naked eye. 40:40 how can a distant sun warm us, when space is cold? 43:00 Why does horizon always “rise to eye level” on a globe? 45:00 using a square tube water level (video link below) 45:55 how high to see curved horizon? 47:20 Blue Marble: Fisheye lens doesn’t indicate fishy data. Space Man: Dog cam footage (video link below) 48:40 “Hotspot” in high altitude footage. 50:05 Countering the GoPro effect (horizon crossing center frame) 51:18 Hotspot in photography, vs in high altitude footage? 52:56 Blue Marble made a great point: if you move around and see a reflection, the reflection will move also. Not so with hotspot. 53:25 What should I do to see curvature? 55:00 Alfred Wallace Bedford Level test. 56:25 closing comments.
Videos Mentioned:
Description of Jan Koziar’s thoughts on the measurement of the Earth being off. youtube.com/watch?v=dLP_GvIfCN0 (22m40s)
Square tube water level: youtube.com/watch?v=NqOQ_BCtqUI (1m25s)
Dogcam high altitude balloon: youtube.com/watch?v=qAPXZgJjv7A
Channel Links:
Cosmic Surfer: youtube.com/channel/UC7bfLk4pg_hgMwT6z6uxHkg
Space Man: youtube.com/channel/UC_O5cmqJNv-TnIadRrhEkbg
ImRic: youtube.com/channel/UCW1SSSpq76COTvdN5CHI0dA
Blue Marble: youtube.com/channel/UCuQPbSSSGG1fE60MahpRZKA
