
About this episode
On November 13th in the world of astronomy, one of the most exciting events occurred back in 1971. On this date, NASA's Mariner 9 spacecraft became the first human-made object to orbit another planet when it successfully entered Mars orbit!
This mission was a game-changer for our understanding of the Red Planet. Mariner 9 arrived during a planet-wide dust storm, which initially obscured most of the surface. Talk about a dramatic entrance! Imagine the scientists' anticipation as they waited for the dust to settle, wondering what secrets Mars would reveal.
As the storm subsided, Mariner 9 began mapping the Martian surface in unprecedented detail. It discovered some of Mars' most iconic features, including the massive Olympus Mons - the largest known volcano in the solar system. This behemoth makes Earth's volcanoes look like ant hills in comparison!
The spacecraft also revealed the existence of Mars' sprawling canyon system, Valles Marineris, which puts our Grand Canyon to shame. It stretches nearly a quarter of the way around the planet's equator. If that doesn't make you feel small, I don't know what will!
Mariner 9's mission lasted almost a year, during which it transmitted more than 7,300 images of Mars. These images covered about 85% of the planet's surface, giving us our first real global view of our mysterious neighbor.
This mission paved the way for future Mars exploration, setting the stage for the rovers and orbiters that followed. It's mind-boggling to think that on this day in 1971, we took our first real step in becoming a multi-planet species in terms of exploration.
So next time you look up at the night sky and spot that reddish dot, remember Mariner 9 and its groundbreaking orbit on November 13th. It's a testament to human ingenuity and our unquenchable thirst for knowledge about the cosmos. Who knows what other astronomical milestones future November 13ths might bring?
This content was created in partnership and with the help of Artificial Intelligence AI
This episode includes AI-generated content.
This mission was a game-changer for our understanding of the Red Planet. Mariner 9 arrived during a planet-wide dust storm, which initially obscured most of the surface. Talk about a dramatic entrance! Imagine the scientists' anticipation as they waited for the dust to settle, wondering what secrets Mars would reveal.
As the storm subsided, Mariner 9 began mapping the Martian surface in unprecedented detail. It discovered some of Mars' most iconic features, including the massive Olympus Mons - the largest known volcano in the solar system. This behemoth makes Earth's volcanoes look like ant hills in comparison!
The spacecraft also revealed the existence of Mars' sprawling canyon system, Valles Marineris, which puts our Grand Canyon to shame. It stretches nearly a quarter of the way around the planet's equator. If that doesn't make you feel small, I don't know what will!
Mariner 9's mission lasted almost a year, during which it transmitted more than 7,300 images of Mars. These images covered about 85% of the planet's surface, giving us our first real global view of our mysterious neighbor.
This mission paved the way for future Mars exploration, setting the stage for the rovers and orbiters that followed. It's mind-boggling to think that on this day in 1971, we took our first real step in becoming a multi-planet species in terms of exploration.
So next time you look up at the night sky and spot that reddish dot, remember Mariner 9 and its groundbreaking orbit on November 13th. It's a testament to human ingenuity and our unquenchable thirst for knowledge about the cosmos. Who knows what other astronomical milestones future November 13ths might bring?
This content was created in partnership and with the help of Artificial Intelligence AI
This episode includes AI-generated content.
Get every episode summarized
Each time Astronomy Tonight publishes, we email you a written briefing from the transcript — the topics, who appeared, and any specific claims, with the ad reads skipped.
Email me new episodesFree for 3 shows. No card needed.
No transcript yet
This episode has not been transcribed. Request it and it moves to the front of the queue.
More episodes
More from Astronomy Tonight

# Venus Transit of 1882: Measuring the Solar System
Astronomy Tonight
Mar 24, 20261:40failed

# Arthur Auwers: The Meticulous Star Mapper Who Built Celestial GPS
Astronomy Tonight
Mar 23, 20261:40completed

Hubble's Flawed Vision: From Disaster to Discovery
Astronomy Tonight
Mar 22, 20261:41failed

# The Great Daylight Comet of 1960: A Celestial Surprise
Astronomy Tonight
Mar 21, 20261:36completed