月球壁纸
by Image data: NASA/JPL-Caltech/SwRI/MSSS Image processing by Alain Mirón Velázquez © CC BY
NASA Image Library · 公有领域（Public Domain）
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Just hours before NASA's Juno mission completed its 53rd close flyby of Jupiter on July 31, 2023, the spacecraft sped past the planet's volcanic moon Io and captured this dramatic view of both bodies in the same frame. The surface of Io, the most volcanically active world in the solar system, is marked by hundreds of volcanoes that regularly erupt with molten lava and sulfurous gases. Juno has provided scientists with the closest looks at Io since 2007, and the spacecraft will gather additional images and data from its suite of scientific instruments during even closer passes in late 2023 and…
