In July 2023, JUICE was expected to perform the first subsurface sounding of this body. In September 2022, the Juno probe’s photos of this body (-5[1])revealed crisscrossing double ridges on its surface. Data from the Galileo probe’s 12 flybys (-5[1])of this body suggested that a deep sublayer of this body is inducing a magnetic field around this body. In 1995, researchers using the Hubble Space Telescope discovered the thin, primarily oxygen, atmosphere of this body. (-5[1])This body is planned to be studied by a namesake NASA “clipper” mission launched in 2024, making several flybys but not entering orbit to avoid harsh radiation belts. For 10 points, name this body, the smallest of the four Galilean (10[1])moons orbiting Jupiter. ■END■ (10[2]0[4])