Conference Presentation, Lecture, Interview
MI Forum: Modern-Day Magellan: JPL Director Charles Elachi
- Dr. Charles Elachi, Director of NASA's Jet Propulsion Laboratory (JPL), delivered a presentation on the Mars Curiosity rover landing, the scientific objectives of space exploration, and future missions.
- The 350 million-mile journey to Mars required landing a car-sized rover within a 2-mile wide target area, a feat compared to hitting a specific golf seat in the Rose Bowl from Boston.
- The "Seven Minutes of Terror" landing sequence involved autonomous spacecraft maneuvers to dissipate kinetic energy equivalent to 18,000 race cars within 7 minutes while traveling at 12,000 mph.
- 50 million Americans watched the landing live, and the JPL website received 1.6 billion hits in the 24 hours following the event.
- The Curiosity rover is powered by a 140-watt nuclear reactor and utilizes a "sky crane" landing system, a first for a vehicle of its size, replacing the airbag system used on previous missions.
- Dr. Elachi highlighted that the rover has confirmed the existence of all chemical elements essential for life on Earth within Martian rock samples.
- Geological analysis of Martian rocks revealed rounded conglomerates and mud cracks, providing evidence that the landing site was once a dry riverbed with flowing water.
- The discovery of gray, non-oxidized material just below the surface indicates that the protective rusty layer on Mars is thin, suggesting organic material could be accessible near the surface.
- A copy of Leonardo da Vinci's Codex of Flight was scanned and sent to Mars aboard the Curiosity rover, linking historical engineering concepts to modern space exploration.
- Space-based technology developed at JPL is being applied to monitor earthquake faults on Earth and measure subsurface water table changes, such as those in the Central Valley and between India and Pakistan.
- JPL licensing revenue from technologies like cell phone camera sensors and rover robotic arms supports Caltech student education and further research.
- The James Webb Space Telescope is on track for a 2018 launch, aiming to observe the universe as it existed 300,000 years after the Big Bang.
- Dr. Elachi projects that human missions to Mars could occur within the next 20 to 25 years, citing potential fuel production from Martian water ice and addressing challenges in radiation and psychology.
- Two new Mars missions were recently approved to counter budget concerns: a 2016 seismology lander to study Mars' internal structure and a 2020 mission designed to collect and cache rock samples for future return to Earth.
- Future exploration priorities include a mission to Jupiter's moon Europa to investigate its subsurface ocean and the potential for life, as well as direct imaging of exoplanets in the next decade.
- Dr. Elachi noted that the Curiosity rover is expected to operate for a decade, with mechanical gears being the most likely component to fail first, though the power source is rated for at least eight years.
- The Curiosity rover has a Morse code pattern of "JPL" on its wheels to measure distance traveled, a detail visible in the tracks left on the Martian surface.
- A picture of Earth taken by the Cassini spacecraft from Saturn shows the planet as a tiny dot, emphasizing the scale of the universe and the unity of humanity.
- Dr. Elachi was born in Lebanon and pursued higher education in France before earning his PhD at Caltech, choosing the institution partly for its proximity to Hollywood.