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He
👨
Pronoun
  chose
Verb
  the
Determiner
  subject
Noun
 'Radio  Astronomy
Proper noun
  and
Coordinating conjunction
  the
Determiner
  Structure
Proper noun
  of
Adposition
  the
Determiner
 Universe'.

He chose the subject 'Radio Astronomy and the Structure of the Universe'.
Words and sentences
👨
New
He

New
chose

New
the

New
subject

New
astronomy

  1. The study of the physical universe beyond the Earth's atmosphere, including the process of mapping locations and properties of the matter and radiation in the universe.
  2. (obsolete) Astrology.

New
and

New
structure

New
of

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