18/07/2025
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When the European House Company’s Jupiter Icy Moons Explorer (Juice) flew previous our Moon in August 2024, its Radar for Icy Moon Exploration (RIME) instrument listened to radio wave echoes to disclose the peak of the lunar floor.
The comparability slider beneath matches RIME’s first-ever ‘radargram’ with an elevation mannequin from NASA’s Lunar Orbiter Laser Altimeter (LOLA). The brilliant pink-to-yellow line that wiggles throughout the darkish purple background traces out the peak of the Moon’s floor. The bumps and dips in these RIME knowledge clearly match up with the peak of the land in LOLA’s elevation map.
Click on on ‘Open Picture’ for extra details about how the radargram was created and the way it must be interpreted.


Making ready RIME for Jupiter’s icy moons
The lunar flyby supplied an incredible alternative to check out all of Juice’s ten science devices on a stable floor in area for the primary time. However it was essential for RIME, as digital noise inside the remainder of the spacecraft is unexpectedly disturbing the delicate machine.
Through the flyby of the Moon, RIME was given eight minutes to look at completely alone, with different devices both switched off or set to quiet mode.
This was the primary likelihood throughout Juice’s journey to Jupiter for RIME scientists to verify how the digital noise impacts the efficiency of their instrument. Primarily based on the information collected, they’ve spent many months engaged on an algorithm to right the problem. The attractive new view signifies simply how profitable they’ve been.
RIME’s activity at Jupiter is to look beneath the icy surfaces of moons Europa, Ganymede and Callisto to map the invisible rocky layers beneath. Although our personal Moon has no icy floor, the profitable mapping of it by RIME demonstrates that the radar instrument is as much as the job.
An iconic patch of the Moon
What makes this picture additional particular is that it captures the identical area photographed by NASA astronaut William Anders on 24 December 1968 in the course of the Apollo 8 mission.
Anders’ spontaneous Earthrise picture grew to become so iconic of the Apollo programme that the most important crater, within the foreground of the picture, was renamed from ‘Pasteur T’ to ‘Anders’ Earthrise’.


Arising for Juice is a flyby of Venus subsequent month. It is a purely operational manoeuvre, making use of Venus’s gravity to provide Juice a lift on its journey to Jupiter. Through the flyby, no devices will probably be switched on – in any case, they’re designed to work at chilly Jupiter fairly than toasty Venus.
RIME science is led by the College of Trento. The instrument was constructed by a consortium led by Thales Alenia House Italia beneath the accountability of the Italian House Company (ASI) and with contributions from NASA’s Jet Propulsion Laboratory.