astronautics vs physics

astronautics and physics both are nouns.

Word	Noun	Adjective	Verb	Adverb
astronautics	Yes	No	No	No
physics	Yes	No	No	No

As nouns, physics is a hypernym of astronautics; that is, physics is a word with a broader meaning than astronautics:

Other hypernyms of astronautics include natural philosophy.

astronautics (noun)	physics (noun)
the theory and practice of navigation through air or space	the science of matter and energy and their interactions
	the physical properties, phenomena, and laws of something