On the 20th of August 1977, it started: Voyager 2 was launched into the vastness of space, marking a significant milestone in human exploration. This ambitious mission aimed to gather vital data about the outer planets and their moons. Then, on the 5th of September, the twin spacecraft Voyager 1 was launched, shortly after its predecessor.
Despite being the second to be launched, Voyager 1 was designated as number one, as it was anticipated to arrive at its destinations before its sister craft.
As these twin probes embarked on their journeys, they carried with them state-of-the-art technology and a golden record containing sounds and images celebrating the diversity of life and culture on Earth.
Their shared goal was to unveil the mysteries of our solar system and send back invaluable information that would deepen our understanding of our cosmic neighborhood and humanity’s place within it.
Jupiter
On the 5th of March 1979 and the 7th of July 1979, they excitedly reached their first destination! For the very first time, we could marvel at Jupiter and its moons in stunning detail. Although they merely flew by, they joyfully discovered volcanoes on Io, stunning rings around Jupiter, Europa’s beautifully cracked icy surface, and even more moons to add to its already impressive collection!
Jupiter has surprised scientists since 1610 when Galileo discovered its first moons, which was a groundbreaking moment in astronomy that significantly changed our view of the universe.
This remarkable planet, the largest in our solar system, is adorned with beautiful stripes and swirls that are actually cold, windy clouds made primarily of ammonia and water, all within a thick atmosphere dominated by hydrogen and helium.
These layers of clouds create mesmerizing patterns that can be observed through telescopes from Earth, inspiring curiosity and research. Additionally, Jupiter’s Great Red Spot, a colossal storm larger than Earth itself, has persisted for hundreds of years, captivating scientists who study its unique characteristics and the mysteries behind its longevity.
This immense storm showcases the dynamic and ever-changing nature of Jupiter’s atmosphere, highlighting the planet’s complex meteorological phenomena and the ongoing fascination it holds for astronomers and space enthusiasts alike.
Fifth in line from the Sun, Jupiter is, by far, the largest planet in the solar system: more than twice as massive as all the other planets combined. Its immense size is truly staggering, with a diameter of about 86,881 miles (139,822 kilometers), which is approximately 11 times that of Earth.
Jupiter is primarily composed of hydrogen and helium, resembling a massive ball of gas, and it features a swirling atmosphere filled with colorful bands and storms, the most famous being the Great Red Spot, a gigantic storm larger than Earth that has been raging for at least 350 years.
With its strong magnetic field and dozens of moons, including the four largest known as the Galilean moons—Io, Europa, Ganymede, and Callisto—Jupiter showcases a complex and dynamic environment, making it a fascinating subject of study for astronomers and space enthusiasts alike.
Saturn
After this, they both went on to Saturn, arriving on the 12th of November 1980 and August 25th, 1981, respectively. Saturn, renowned for its stunning rings, is the sixth planet from the Sun and the second-largest planet in our solar system, following Jupiter.
This gas giant is composed primarily of hydrogen and helium, creating a mesmerizing atmosphere that captivates astronomers and space enthusiasts alike. With a diameter of about 86,881 miles (139,822 kilometers), Saturn’s size and unique features, including its extensive system of moons, make it a focal point of scientific study and exploration.
The planet’s striking beauty and complex weather systems demonstrate the dynamic nature of our cosmic neighborhood, inviting further questions about the formation and evolution of planetary bodies.
They found a frozen world, which, much like Jupiter, had massive storms swirling across its surface, captivating scientists and astronomers alike with their intensity and scale.
As they studied this intriguing planet, we saw the rings of this world in more detail than ever before, revealing a complex structure composed of ice particles and rocky debris, shining brilliantly in the distant sunlight. Additionally, its largest moon, Titan, was found to have a thick atmosphere, rich in nitrogen and methane, fostering a unique environment that sparked excitement about the possibility of life.
At this point, Voyager 1 was flung from the solar system by Saturn’s gravity, executing a well-calculated maneuver that propelled it into the vastness of interstellar space; Voyager 2, however, bravely continued the mission to explore the last of the outer planets alone, gathering invaluable data and images that would deepen our understanding of the outer reaches of our solar system.
Uranus
So far, every planet had its surprises, and Uranus was no exception. On the 24th of January, Voyager 2 made its lonely flyby of a planet that was almost completely featureless, presenting an enigmatic surface that sparked curiosity among scientists and space enthusiasts alike.
As the spacecraft captured stunning images and crucial data, it became clear that this ice giant held secrets beyond its bland exterior. Magnetic instruments found it was like the planet had been knocked on its side; both the rings and the planet’s magnetic field were side on to the other planets, creating a unique phenomenon that challenged existing theories about planetary formation and dynamics.
This unusual orientation led to a deeper understanding of the complexities in Uranus’s atmospheric composition and its interactions with solar winds, offering a glimpse into the planet’s mysterious past and the forces that shaped it over billions of years.
The first planet found with the aid of a telescope, Uranus, was discovered in 1781 by astronomer William Herschel, although he originally thought it was either a comet or a star. It was two years later that the object was universally accepted as a new planet, in part because of observations by astronomer Johann Elert Bode.
Herschel tried unsuccessfully to name his discovery Georgium Sidus after King George III, believing this would honor the monarch who had supported his astronomical work and research.
Instead, the scientific community, valuing a more universal and classical approach, accepted Bode’s suggestion to name it Uranus, the Greek god of the sky, as suggested by Bode, which reflected the tradition of naming planets after mythological figures.
This decision was not without its controversies, as many debated the merits of honoring contemporary figures versus historical ones, but ultimately, the name Uranus was embraced, representing not just a celestial body but also the aspirations of the scientific community to connect their discoveries with the rich tapestry of ancient mythology.
The adoption of Uranus would later influence how other celestial bodies in our solar system were named, marking a shift towards names that embodied the spirit and heritage of human civilization’s quest for knowledge.
Neptune
On August 25, 1989, Voyager 2 completed its last visit to our solar system. Neptune, a world mostly made of methane, displayed its stunning blue color and a large storm known as the Great Black Spot, which resembled an eye. Winds on Neptune were faster than the speed of sound, but this wasn’t all it had to show.
After Neptune, there wasn’t much left for the Voyager probes to do, yet their journey continued to be remarkable. In February 1999, Voyager 1 took a poignant last look back at the solar system, capturing the vastness of space that it had navigated through for so many years.
As it turned to gaze at the distant planets, it reflected on the planet Earth: the small blue dot that held countless lives and stories. This historic moment culminated in a final picture, which became known as a portrait of the solar system.
In this image, the planets appeared like tiny beads scattered against the dark, infinite canvas of space, a stunning reminder of our place in the universe and the insignificance of our world in the grand scheme of things.
Despite being launched 40 years ago, their mission may never end, serving as ambassadors to eternity for the species that made and launched them, hoping to make their mark in the vast universe. These remarkable machines carry with them the hopes, dreams, and collective knowledge of humanity, designed to traverse the immeasurable cosmic distances while sending back invaluable data to Earth.
If left alone, these two incredible machines will outlive not only the race that made them, but also the planet from which they came, continuing to journey through the dark expanses of space long after we are gone, quietly transmitting whispers of our existence to the stars that may or may not bear witness to their silent ode to humanity.
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