#50YearsAgo today, the Explorer 49 satellite launched toward the Moon to study low-frequency radio emissions from our solar system and beyond.
With its antennas deployed it measured 457.2 m, making it the largest human-made object to orbit the Moon. https://go.nasa.gov/3OWKLI9
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In Depth | Explorer 49 – NASA Solar System Exploration
NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.NASA Solar System Exploration