The International Telecommunications Union reserves a special radio band in the 1400-1427 MHz range, called the L-band, especially for Earth-observing satellites and space astronomy.
To establish a series of science and technology satellites to enhance researches on microgravity, material science, life science, space environment and astronomy.
建立新型的科学探测与技术试验卫星系列，加强微重力材料科学生命科学空间环境和天文研究。
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Astronomy enthusiasts often enter this field as hobbyists, using binoculars or a telescope to observe the motion of planets or artificial satellites orbiting the earth.