The Voyager satellites have changed humanity's perception of the solar system. These spacecraft were launched by NASA in 1977 to study the gas giant planets.
The mission has significantly exceeded its initial goals and continues its journey in space nearly five decades after launch. Today, these human-made artifacts continue their work in interplanetary space.
Fifty years ago, on July 20, 1976, humanity received its first visual record of the surface of Mars. This image was captured by a spacecraft that landed on the red planet, sent by NASA.
The photograph came from the Viking 1 probe, shortly after its successful landing. The event took place at the NASA Jet Propulsion Laboratory in the United States, where mission controllers monitored the reception of the first signals emitted by the module. The image revealed terrain characterized by rocks and fine dust, as well as showing one of the equipment's own structures.
The Viking 1 mission initiated robotic exploration of the Martian surface by the American space agency. One of its central purposes was to investigate the planet's environment for any signs of life within the Solar System.
The Viking 1 landing occurred at 5:12 AM Pacific Time. Controllers confirmed that the module had successfully overcome Mars' thin atmosphere and reached the ground. Approximately 40 minutes later, the first photo began to appear on the team's monitors, being assembled progressively, line by line.
The initial image presented an unprecedented scene for humanity: a soil covered with stones and dust, with long shadows cast by rock formations near the module. In the bottom right corner of the record, one of the support bases of the Viking 1 itself was visible, visually confirming the presence of the craft on Mars.
Thomas Mutch, a scientist and leader of the team responsible for the mission's imaging system, shared his anticipation while waiting for the record. According to him, the screen, which was initially dark, began to display the first traces of the photograph until the details of the Martian landscape became evident.
Mutch reported: 'I studied the black screen, waiting for that narrow band that would indicate the first lines of the first image. And it appeared. [...] Rocks and sand are visible, and finally, on the right, one of the bases of the space vehicle, a symbolic artifact that confirms our conquest with the signal of reality. I say it again and again: 'It's incredible.' '
Viking 1 remains a milestone in space exploration as the first NASA robot to operate directly on the surface of Mars. Six weeks after its touchdown, its sister unit, Viking 2, landed in another area of the planet to expand the studies conducted by the mission.
In addition to the two landers, the orbiters that transported the probes to Mars continued to collect data from space, assisting in maintaining communication between the devices on the planet and Earth.
Five decades after this historic landing, the Viking mission remains linked to NASA's legacy of research on Mars. The data obtained by the equipment was crucial in increasing human understanding of the red planet and the chances of finding signs of life beyond Earth.
Planning a space mission covering the entire Solar System is an enormous complexity even in our day. To imagine such an undertaking in the 1970s, when computer processing power was incomparably less than that of a modern smartphone, is a real challenge.
Nevertheless, it was this boldness that led to the creation of the legendary Voyager spacecraft, launched in 1977 to study giant planets and reveal a much more dynamic and amazing universe than scientists had assumed.
For almost five decades, the Voyager 1 and 2 spacecraft have significantly expanded our understanding of Jupiter, Saturn, Uranus, and Neptune. They discovered unprecedented phenomena, recorded historic images, and, most importantly, became the first human-made objects to explore interstellar space. Their contribution has forever changed the history of space exploration and continues to yield scientific results to this day.
To recall this outstanding adventure, learn behind-the-scenes details, and understand why Voyager remains one of the most important missions in the history of astronomy, amateur astronomer and science popularizer Alessandro Mota participates in the Olhar Espacial program. This promises to be a fascinating journey through one of the greatest epics of space research.
The Olhar Espacial program, hosted by Marcelo Zurita, President of the Paraíba Astronomy Association (APA) and member of the Brazilian Astronomical Society (SAB), as well as Technical Director Bramon and National Coordinator of Asteroid Day Brazil, is broadcast live every Friday at 9:00 PM Brazilian time via the broadcaster's official channels on YouTube, Facebook, Instagram, X (formerly Twitter), LinkedIn, and TikTok.
Alessandro Mota is a science popularizer, astrophotographer, and amateur astronomer. He dedicates his time to popularizing astronomy, constantly translating, writing, and recording videos with a didactic approach for the Mistérios do Espaço project. He is from the city of Conceição do Coite and is a student at the Faculty of Social Communications of the State University of Bahia.
