Exploring Stickney Crater on Phobos: A Martian Mystery

Stickney Crater, named after mathematician Chloe Angeline Stickney Hall, is the largest crater on Mars' moon Phobos. At over 9 kilometres across, it dominates the tiny moon, which itself is only about 22 kilometres in diameter. The impact that created Stickney was so immense that it nearly shattered Phobos. Captured by the HiRISE camera aboard the Mars Reconnaissance Orbiter in March 2008, this enhanced-colour image reveals not only the crater's vastness but also intriguing surface features. Despite Phobos' weak gravity, less than 1/1000th that of Earth, streaks on the crater walls suggest that loose material has slid down over time.

The Science Behind Phobos' Features

The light bluish regions near Stickney's rim may indicate a freshly exposed surface, a clue to the moon's geological activity. The grooves running along Phobos' surface remain a subject of scientific curiosity. These may result from tidal stresses as Phobos orbits Mars or from the impact that formed Stickney itself. Understanding these features offers insights into the moon's history and the dynamic processes at play in the Martian system. For those interested in tracking Mars missions, the Mars Globe offers real-time data on current orbiters and surface missions.

Observing Mars' Moons

While observing Phobos directly from Earth is challenging due to its small size and proximity to Mars, the Mars Reconnaissance Orbiter provides invaluable data. The Mars Globe on Orbital Radar allows enthusiasts to explore current missions and learn more about the Red Planet and its moons. As of now, 15,778 active satellites orbit Earth, according to Orbital Radar tracking data, highlighting the expanding reach of our observational capabilities.