Journey of Light: Part 2

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Journey of Light: Part 2 · 11:56 · Intellect Plus

In short: Make an invisible physical process understandable by following light itself. Episodes: 1. Looking Into the Past; 2. Why Don't All the Other Suns Give Us Daylight?; 3. How Many Planets Might Be Out There?; 4. What Happens When a Photon Hits Your Hand?; 5. Does Light Fade, or Just Spread Out?; 6. The Journey of a Photon

A 11:56 short film in the series “Journey of Light”, narrated by intellect_voice_01.

Sources used in this film: Chandra X-ray Center (Smithsonian Astrophysical Observatory, operated for NASA), “Chandra :: Photo Album :: Cosmic Look-Back Time”; NASA (National Aeronautics and Space Administration), NASA Science, James Webb Space Telescope mission pages, “How Does Webb See Back in Time? - NASA Science”; NASA Glenn Research Center, “"Seeing" the Earth, Moon, and Sun to Scale”; NASA (National Aeronautics and Space Administration), NASA Science, “Facts About Earth”; NASA Science (National Aeronautics and Space Administration), “Cosmic Distances - NASA Science”; NASA Science (NASA Goddard Space Flight Center, Hubble Space Telescope), “Hubble Image of Proxima Centauri - NASA Science”; NASA Goddard Space Flight Center (Imagine the Universe!, HEASARC), “Imagine the Universe!”; NASA Science, “What is a light-year? - NASA Science”; NASA Science (Hubble Space Telescope), “Compass and Scale Image of Andromeda - NASA Science”; University of Liverpool (talk slides by Dr Steve Barrett, presented to Clydesdale Astronomical Society, 27 Oct 2025), “Misconceptions ClAS”; NASA Science (National Aeronautics and Space Administration), “Stars - NASA Science”; Ohio State University, Department of Astronomy (Astronomy 162 lecture notes by Prof. Barbara Ryden), “How Bright is a Star?”; Maricopa Community Colleges (Open Maricopa), textbook "Astronomy with Extras and Interactives" by Janice Hester, “Bright Stars – Luminous or Nearby? (Graded Reading) – Astronomy with Extras and Interactives”; European Space Agency (ESA), “Proxima Centauri, our nearest neighbour”; NASA Science (Hubble Space Telescope, NASA Goddard Space Flight Center), “Hubble Image of Proxima Centauri - NASA Science”; NASA Science (National Aeronautics and Space Administration), “Cosmic Distances - NASA Science”; NASA (National Aeronautics and Space Administration), “The Inverse Square Law of Light - NASA”; NASA (Wide-field Infrared Survey Explorer Education and Public Outreach, Center for Science Education at the Space Sciences Laboratory, University of California, Berkeley), “583137main_inverse_square_law_of_light.pdf”; University of Kansas (course lecture notes, ASTR 391, crossfield.ku.edu), “radiation”; Western Kentucky University, Department of Physics and Astronomy (astro.wku.edu), “Magnitudes and distance”; NASA's Goddard Space Flight Center, Scientific Visualization Studio, “Alpha Centauri Stellar System”; HyperPhysics (R Nave, Department of Physics and Astronomy, Georgia State University), “Close Stars”; NASA Goddard Space Flight Center (StarChild, High Energy Astrophysics Science Archive Research Center), “Why is space black?”; NASA Science (Night Sky Network article by Brian Kruse of the Astronomical Society of the Pacific), “Looking Beyond the Stars: September's Night Sky Notes - NASA Science”; The Pennsylvania State University, College of Earth and Mineral Sciences (ASTRO 801, Dr. Christopher Palma), “ASTRO 801: Planets, Stars, Galaxies, and the Universe”; Princeton University (Robert J. Vanderbei, Freshman Seminar 175 lecture notes, 2018), “lec4.pdf”; NASA Science (National Aeronautics and Space Administration), “How We Find and Characterize - NASA Science”; European Space Agency (ESA), Science & Technology portal (sci.esa.int), “Exoplanet detection methods - Exoplanets - Science Portal”; NASA (paper by Roger C. Hunter, NASA Ames Research Center, presented at the 4S Symposium 2018), “Microsoft Word - 4SKepler.docx”; NASA Ames Research Center / SETI Institute (NASA Technical Reports Server), “20110010911.pdf”; NASA (Jet Propulsion Laboratory), “NASA’s Tally of Planets Outside Our Solar System Reaches 6,000 - NASA”; NASA Exoplanet Archive (operated by Caltech/IPAC), “Exoplanet and Candidate Statitics”; NASA Science (NASA's Exoplanet Exploration Program), “Exoplanet in the corner pocket: a recount for thousands of worlds - NASA Science”; NASA Science (NASA Hubble Mission Team, Goddard Space Flight Center), “The Milky Way Contains at Least 100 Billion Planets According to Survey - NASA Science”; NASA Hubble mission release page, hosting the research letter by A. Cassan et al. (PLANET, OGLE and MOA collaborations), “Letter_Cassan-etal.pages”; NASA Goddard Space Flight Center, Astrophysics Science Division (NASA Blueshift blog, by Maggie Masetti, July 22, 2015), “How Many Stars in the Milky Way?”; European Space Agency (ESA), “How many stars are there in the Universe?”; NASA (NASA Science, Hubble Space Telescope mission team, Goddard Space Flight Center), “What Does the Milky Way Weigh? Hubble and Gaia Investigate - NASA Science”; Smithsonian Institution (Center for Astrophysics | Harvard & Smithsonian, Chandra X-ray Center), “Chandra Sees Evidence of Possible Planet in Another Galaxy”; NASA Science (National Aeronautics and Space Administration), “First Evidence of a Planet Identified Beyond Our Galaxy - NASA Science”; Biomedical Optics Express (Optica Publishing Group), via PubMed Central, U.S. National Library of Medicine, “Relevance and utility of the in-vivo and ex-vivo optical properties of the skin reported in the literature: a review [Invited]”; Journal of Biomedical Optics (SPIE), hosted by PubMed Central, US National Library of Medicine, “Effect of skin color on optical properties and the implications for medical optical technologies: a review”; Biomedical Engineering Letters (Springer), via PubMed Central / U.S. National Library of Medicine, “Advances in the simulation of light–tissue interactions in biomedical engineering”; Springer Nature (International Journal of Thermophysics), article by Takahiro Kono & Jun Yamada, “In Vivo Measurement of Optical Properties of Human Skin for 450–800 nm and 950–1600 nm Wavelengths”; Journal of the American Academy of Dermatology (via PubMed Central, US National Library of Medicine), “Visible Light Part I. Properties and Cutaneous Effects of Visible Light”; University of Maryland Physics Education Research Group (Edward F. Redish, Teaching Physics with the Physics Suite), “Sample Problem”; Massachusetts Institute of Technology (MIT), course 5.33 lecture notes, “Microsoft Word - Spec6-Electron.doc”; Nature Communications (Springer Nature), “Probing the heterogeneous structure of eumelanin using ultrafast vibrational fingerprinting”; Chemical Reviews (American Chemical Society), hosted on PubMed Central by the U.S. National Library of Medicine, “Photothermal Nanomaterials: A Powerful Light-to-Heat Converter”; European Journal of Histochemistry (A.C. Croce and G. Bottiroli, National Research Council Institute of Molecular Genetics / University of Pavia), hosted by the US National Library of Medicine's PubM…, “Autofluorescence Spectroscopy and Imaging: A Tool for Biomedical Research and Diagnosis”; Elsevier (ScienceDirect), Archives of Oral Biology, review by Giovannacci et al., 2019, “Which are the main fluorophores in skin and oral mucosa? A review with emphasis on clinical applications of tissue autofluorescence”; NASA Goddard Institute for Space Studies (GISS), hosting Part I of Mishchenko, Travis & Lacis, 'Scattering, Absorption, and Emission of Light by Small Particles', “Microsoft Word - i-iv.doc”; University of Southampton (Physics Skills Workshops), “Microsoft Word - Inverse Square Laws.doc - pdfMachine from Broadgun Software, http://pdfmachine.com, a great PDF writer utility!”; NASA (lesson developed for the WISE mission's education program at the Center for Science Education, Space Sciences Laboratory, University of California, Berkeley), “583137main_inverse_square_law_of_light.pdf”; NASA Goddard Space Flight Center, Imagine the Universe! (High Energy Astrophysics Science Archive Research Center, HEASARC), “Imagine the Universe!”; National Radio Astronomy Observatory (NRAO) – lecture notes by Steven T. Myers, ASTR001, “Lecture 23 - Stars (3/6/96)”; University of Rochester, Department of Physics and Astronomy (Astronomy 142 lecture notes), “02_lecture.pdf”; Fermi National Accelerator Laboratory (Fermilab), Office of Public Affairs; answer by Leila Belkora, Ph.D., Astrophysics, “Fermilab | Science | Inquiring Minds”; Physics Van, Department of Physics, The Grainger College of Engineering, University of Illinois Urbana-Champaign, “Does Light Lose Energy as it Travels?”; Encyclopaedia Britannica (archived via the Internet Archive Wayback Machine), “electromagnetic radiation | physics”; Encyclopaedia Britannica, “Light - Photons, Wavelengths, Quanta | Britannica”; University of Maryland, Department of Astronomy (ASTR120 course supplement), “suppl04.pdf”; Department of Computer Science, University of Massachusetts Amherst (course notes by Erik G. Learned-Miller), “lightAndMotion.dvi”; NASA Science, “Hubble Cosmological Redshift - NASA Science”; NASA Science (James Webb Space Telescope), “What Is Cosmological Redshift? - NASA Science”; NASA, “Facts About Earth”; NASA Science (National Aeronautics and Space Administration), Framework for Heliophysics Education, “- NASA Science”; NASA Science (NASA Science Editorial Team), “Cosmic Distances - NASA Science”; Encyclopaedia Britannica, “Astronomical unit (AU, or au) | Definition, Conversion, & Facts | Britannica”; NASA Marshall Space Flight Center (Solar Physics Group), “NASA/Marshall Solar Physics”; NASA Science, “Sun: Facts - NASA Science”; U.S. Department of Energy, Office of Science (Nuclear Physics), “Understanding How the Sun Shines: From Triton Decay to Proton-Proton Fusion”; NASA Science (NASA HEAT, Heliophysics Education Activation Team), “HBY & Math #9: The Random Walk Problem  - NASA Science”; Ohio University (Zach Meisel, ASTR4201 course notes, Fall 2020), “Quick notes on Light Propagation”; Princeton University, Department of Astrophysical Sciences (course notes for A403, 'Stellar timescales'), “timescales.pdf”; Swarthmore College (Astro 123 course reading; textbook chapter 9, 'Stellar Atmospheres'), “OC_randomwalk.pdf”; University of Maryland, Department of Astronomy (ASTR 601 lecture notes), “lecture04.dvi”; NASA (Sun-Earth Day 2007, 'Technology Through Time' series, archived at NASA Goddard Space Flight Center's SPDF), “NASA - Sun-Earth Day - Technology Through Time”; NASA Marshall Space Flight Center (MSFC) Solar Physics group, “NASA/Marshall Solar Physics”; NASA Goddard Space Flight Center (Imagine the Universe!, HEASARC), “Imagine the Universe!”; Biochemical Society / Portland Press (Essays in Biochemistry), hosted on PubMed Central by the U.S. National Library of Medicine, “Photosynthesis”; HyperPhysics (R Nave, Georgia State University), “Light Absorption for Photosynthesis”.

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