How Voyager Opened Up the Universe

Gary A. Fowler
4 min readJun 6, 2024



In 1977, humanity embarked on one of its most ambitious missions — sending the Voyager spacecrafts into the depths of space to explore the unknown. More than just probes, Voyagers 1 and 2 became messengers of Earth, carrying the iconic Golden Record with greetings, music, and images intended for any potential extraterrestrial intelligence. This mission not only expanded our knowledge of the universe but also transformed our understanding of our own solar system.

The Genesis of the Voyager Missions

Concept and planning

The Voyager mission was conceived during the late 1960s as a grand tour of the outer planets. Its objective was to take advantage of a rare planetary alignment that occurs once every 176 years. This alignment allowed the spacecraft to use gravitational assists to journey from planet to planet without expending much fuel.

Goals of the Voyager missions

The primary goals were to conduct close-up studies of Jupiter, Saturn, Uranus, and Neptune and their moons and rings. Additionally, the missions aimed to investigate the magnetic fields and space environments surrounding these planets.

The Journey Begins

Launch details

Voyager 1 was launched on September 5, 1977, followed closely by Voyager 2 on August 20, 1977. Their launches marked the beginning of a journey that would eventually see them become the most distant human-made objects in space.

Key milestones in the early stages

Early into their missions, both Voyagers returned unprecedented photos and data about the outer planets, which dramatically altered our understanding of the solar system.

Revolutionary Discoveries by Voyager

Discoveries about Jupiter

Moons of Jupiter

Voyager revealed active volcanoes on Io, Jupiter’s moon, fundamentally changing our view of the moon’s geological activity.

Jupiter’s atmosphere and magnetic field

The missions provided detailed images of the giant planet’s swirling clouds and massive storms like the Great Red Spot, and examined its powerful magnetic field.

Saturn’s secrets unveiled

Rings and moons of Saturn

The detailed images of Saturn’s rings and the discovery of new moons astounded scientists.

Atmospheric data

Voyager’s instruments measured the atmosphere and magnetosphere of Saturn, adding rich detail to our understanding of the planet.

Voyager’s encounters with Uranus and Neptune

Unique findings from Uranus

The probe found that Uranus’s axis of rotation is tilted sideways, an anomaly in the solar system.

Neptune’s surprises

Voyager 2’s flyby of Neptune provided the first close-up images of the planet and its moon, Triton, revealing a geologically active world with geysers spewing nitrogen ice.

The Golden Record

Contents of the Golden Record

The Golden Record carries sounds and images selected to portray the diversity of life and culture on Earth.

Significance and messages intended

It serves as a time capsule intended to communicate the story of our world to extraterrestrials.

Voyager’s Legacy and Continuing Impact

Continuing data transmission

Both Voyager spacecraft continue to send data back to Earth, crossing new boundaries in the interstellar space.

Impacts on science and culture

The data from Voyager has fueled countless studies and inspired many to pursue careers in science and space exploration.

Inspirations for future missions

The success of Voyager has directly inspired future missions, including the New Horizons probe to Pluto and beyond.

The Edge of the Solar System

Crossing into interstellar space

Voyager 1 entered interstellar space in 2012, providing the first direct measurements of this environment.

What have we learned?

The information sent back by Voyager has led to new theories about the nature of the universe beyond our solar system.

Challenges and Triumphs

Technical challenges faced

The missions were not without their challenges, including issues with the spacecraft’s thrusters and power supplies.

Successes against the odds

Despite these hurdles, Voyager exceeded all expectations, pioneering many firsts in space exploration.

The Future of Space Exploration

Inspired technologies and missions

The technology and data from Voyager have paved the way for advanced spacecraft and missions that continue to push the boundaries of what is possible.

The role of AI and modern tech in future explorations

Artificial intelligence and modern technologies are expected to play pivotal roles in analyzing the vast amounts of data from future interstellar missions.


The Voyager missions have profoundly expanded our view of the universe, revealing the outer planets in unprecedented detail and continuing to provide valuable data as they journey through interstellar space. Their legacy endures in the data they send back, the questions they continue to answer, and the generations they inspire to look to the stars.


  1. How far have the Voyager spacecraft traveled?
  2. What is the Golden Record, and why was it included in the missions?
  3. How do the Voyager spacecraft power themselves?
  4. What have been the most surprising discoveries of the Voyager missions?
  5. Are there plans for similar missions in the future?



Gary A. Fowler

Founder & CEO of GSDVS, Generative AI Guy, Speaker, Author, Investor and Venture Scaler