Assertion: astronomer | /r/CapableOf | concentrate on area of astronomy
Facets:
Source sentences:
text: Most astronomers concentrate on a particular question or area of astronomy: for example, planetary science, solar astronomy, the origin or evolution of stars, or the formation of galaxies.
text: Most astronomers concentrate on a particular question or area of astronomy, for example, planetary science, solar astronomy, the origin and evolution of stars, or the formation of galaxies.