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The two Helios spacecraft were launched into solar orbits in December 1974 and January 1976. Each spacecraft contained three zodiacal light photometers intended to measure the distribution of dust in the interplanetary medium between the Sun and the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ef6453e34db7e6ca09efc1a4030d088c
https://doi.org/10.21236/ada279414
https://doi.org/10.21236/ada279414
