Alien-hunting spacecraft's performance enhanced by Apollo's legendary 'Earthrise' crater impact
The iconic "Earthrise" photograph, taken by astronaut William Anders during the Apollo 8 mission in 1968, showcased a half-lit Earth majestically rising above the lunar horizon. Fast forward to 2024, this very crater, now named Anders' Earthrise, played a significant role in the preparations for the Jupiter Icy Moons Explorer (JUICE) mission.
As JUICE, launched in April 2023, embarks on its journey towards Jupiter, it made a brief stopover at the Moon. This encounter proved to be a valuable opportunity, serving as a natural and precise test site for JUICE's suite of 10 instruments. The mission's primary task is to map the invisible rocky layers below the icy surfaces of Jupiter's moons Europa, Ganymede, and Callisto, in search of signs of habitability and potential extraterrestrial life.
The lunar crater, nearly 25 miles (40 kilometers) wide, provided a well-characterized lunar surface, enabling mission scientists to verify instrument performance and improve their capabilities for the upcoming search for life in the Jovian system. The successful use of Anders' Earthrise crater during the Moon flyby confirmed its role as a crucial stepping stone in preparing the spacecraft’s alien-hunting tools to explore the more promising environments of the outer solar system.
The Radar for Icy Moon Exploration (RIME) instrument on JUICE uses radio wave echoes to measure elevation on rocky bodies. Data from RIME's map of Anders' Earthrise crater proved that RIME is ready for its big job, matching the elevations captured by LOLA (Lunar Orbiter Laser Altimeter). This in-space calibration was pivotal because it ensured JUICE's sensors would gather the most accurate and meaningful data once in orbit around Jupiter and its moons, starting from 2031.
Studying Jupiter and its moons will provide new insights about the formation of gas giants and planetary systems at large. Moreover, it will help tease out signs of life and habitability beneath the icy shells of the enormous moons, offering exciting possibilities for the future of space exploration.
As JUICE heads towards Venus for a gravity assist on its path to Jupiter, the successful calibration of its instruments at the Anders' Earthrise crater serves as a promising sign of the discoveries that await us in the outer solar system.
[1] Source: JUICE Mission Scientists, 2024.
- The JUICE mission's encounter with the Anders' Earthrise crater on the Moon in 2023 served as an essential testing ground for its suite of 10 instruments, as it prepares to delve into the outer solar system, particularly the icy moons of Jupiter.
- The successful calibration of JUICE's Radar for Icy Moon Exploration (RIME) instrument using data from the map of Anders' Earthrise crater confirmed RIME's readiness for its primary task, which involves searching for signs of habitability and potential extraterrestrial life on Jupiter's icy moons, starting from 2031.
