Operating at a record distance of 25,9 miliar kilometer, NASA’s Voyager 1 spacecraft now requires 24 full hours for a radio command sent from Earth to reach it, with another 24 hours needed for scientists to receive a response, vietnam.vn reported. Launched from Cape Canaveral on September 5, 1977, the spacecraft has spent nearly half a century pushing the boundaries of deep space exploration. In 1998, it surpassed Pioneer 10 to become the most distant human-made object from Earth. By 2012, Voyager 1 became the first spacecraft to leave the protective bubble of the solar system’s heliosphere, entering interstellar space.
Grand Tour of Gas Giants and Volcanic Discovery
Early 1970s exploration capitalized on a rare planetary alignment of Jupiter, Saturn, Uranus, and Neptune. This configuration allowed the probes to use gravitational assists to shorten interplanetary travel times to under 15 years. NASA launched twin Pioneer missions in 1972 and 1973 to test the routes before sending Voyager 1 and Voyager 2 on their journeys. In March 1979, Voyager 1 captured complex atmospheric bands on Jupiter and later revealed structured rings around Saturn and new moons around Uranus and Neptune.
This finding fundamentally changed scientific understanding of the outer solar system, proving it was not merely cold and inert ice. Subsequent missions like Galileo and Cassini later utilized these insights to probe subsurface oceans on Europa and water-ice geysers on Saturn’s moon Enceladus.
Crossing the Solar Boundary
On August 25, 2012, Voyager 1 officially crossed the heliopause at a distance of approximately 18 miliar kilometer from the Sun, exiting the heliosphere. Sensors detected a sharp spike in cosmic ray radiation and a sudden drop in solar wind particle density. However, because the direct plasma instrument on the spacecraft had failed years prior, confirmation was delayed until 2013, when a coronal mass ejection from the Sun triggered plasma oscillations that allowed scientists to calculate the surrounding electron density.
Data transmitted from interstellar space continues to challenge existing astrophysical models. According to NASA Goddard Space Flight Center physicist Jeewoo Park, the boundary separating the solar system from the interstellar medium is not a sharp, clean edge, as the spacecraft continues to register high particle densities and magnetic field spikes driven by solar shockwaves. Both Voyager 1 and Voyager 2 carry golden records containing sounds, images, greetings, and music from Earth intended for any future extraterrestrial intelligence they might encounter.
Frequently Asked Questions
How much power do the Voyager 1 instruments have left?
The radioactive thermoelectric generators powering both Voyager spacecraft experience continuous yearly power degradation. Scientists estimate that instrument power sources will be completely depleted within 10 to 15 years, at which point signal reception from the probes will permanently cease.
What message is inscribed on the Voyager golden records?
Each spacecraft carries a copper phonograph record plated with gold that includes a map of the solar system, greetings spoken in dozens of languages, natural sounds such as wind, rain, and animal calls, and selections of global music.
Where are the Voyager probes heading next?
In roughly 42,000 years, Voyager 2 will pass within 700 light-years of the red dwarf star Ross 248. Approximately 44,000 years after that, Voyager 1 will make a similar close approach to the star Gliese 445.
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