One Light-Day From Earth — Voyager 1 Still Answers After 49 Years

...On November 18, 2026, Voyager 1 becomes the first human-made object one light-day from Earth: a command sent to it will need a full day to arrive. Getting there has taken more than distance. Since 2023 its team has worked around a corrupted memory chip, a radio that switched itself to a transmitter last used in 1981, roll thrusters written off in 2004, and a power supply that loses about four watts every year. Every fix has to cross a round trip of about two days before anyone on Earth knows whether it worked. This is how NASA's longest-running and most distant spacecraft is still kept alive, one command at a time, and what comes after the light-day mark. Keywords: Voyager 1, NASA, deep space network, interstellar mission, spacecraft memory chip, thrusters, power budget, 1981 transmitter, light-day, deep space communication CHAPTERS 0:00 One Light-Day 2:52 A Conversation With a Two-Day Pause 4:27 A Signal That Stopped Making Sense 6:18 Moving Code From Twenty-Four Billion Kilometers Away 7:44 Two Degrees 8:59 A Transmitter Last Used in 1981 10:36 The Thrusters Nobody Expected to Use 13:13 Four Watts a Year 15:52 After the Mark CREDITS • NASA/JPL-Caltech/University of Iowa — us-gov-105 http://images-assets.nasa.gov/image/P... • NASA/JPL-Caltech — us-gov-105 http://images-assets.nasa.gov/image/P... • NASA/GSFC — us-gov-105 http://images-assets.nasa.gov/image/G... • NASA — us-gov-105 http://images-assets.nasa.gov/image/G... • NASA/JPL — us-gov-105 http://images-assets.nasa.gov/image/P... • NASA/JPL / ESA/NASA/JPL-Caltech/GBT/WSRT/IRAM/C. Clark (STScI) — us-gov-105 http://images-assets.nasa.gov/image/P... • NASA/JPL / Caltech/Palomar — us-gov-105 http://images-assets.nasa.gov/image/P... • NASA/JPL-Caltech/KSC — us-gov-105 http://images-assets.nasa.gov/image/P... • NASA/JPL-Caltech/Lunar & Planetary Institute — us-gov-105 http://images-assets.nasa.gov/image/P... • NASA/JPL / MDSCC/INTA, Francisco "Paco" Moreno — us-gov-105 http://images-assets.nasa.gov/image/P... • NASA/Canberra Deep Space Communication Complex — us-gov-105 http://images-assets.nasa.gov/image/P... • NASA/JPL-Caltech/Stella Ocker — us-gov-105 http://images-assets.nasa.gov/image/P... • NASA/KSC — us-gov-105 http://images-assets.nasa.gov/image/P... • NASA/JPL/Walt Feimer — us-gov-105 http://images-assets.nasa.gov/image/P... • NASA/JPL / ASA/JPL-Caltech — us-gov-105 http://images-assets.nasa.gov/image/P... • NASA/ARC — us-gov-105 http://images-assets.nasa.gov/image/A... • NASA/JPL-Caltech/MIT — us-gov-105 http://images-assets.nasa.gov/image/P... • NASA/JPL / ESA/NASA/JPL-Caltech — us-gov-105 http://images-assets.nasa.gov/image/P... • NASA/JPL/JHUAPL — us-gov-105 http://images-assets.nasa.gov/image/P... Narration is produced with a synthetic voice. NASA does not endorse this channel.