I noticed this moment from the second movie. I guess the Macross creators are Osamu Tezuka fans.
P.S. The creator is Shoji Kawamori, active in anime since the late 70s. I guess it was hard for him NOT to be an Osamu Tezuka fan, seeing as he grew up in the master's heyday and was, after all, into anime/manga!
They are and it's not the only moment. The Hyotan Tsugi itself is featured on a toy stal, and I have read about (but not found yet) an Astro Boy cameo.