astrophysicist

IPA/ˌæstrəʊˈfɪzɪsɪst/
KK[ˌæstrofˈɪsɪsɪst]IPA/ˌæstrəʊˈfɪzɪsɪst/

astrophysicist — noun

  • astrophysicistsingular
  • astrophysicistsplural

1. a scientist who uses physics to understand stars, planets, black holes, and othe

1.nounC2
Definition

a scientist who uses physics to understand stars, planets, black holes, and other matter in space.

Example

Christopher became an astrophysicist after building telescopes with his aunt.

become an astrophysicist

At the mountain lab, Folake worked with an astrophysicist from Lagos.

an astrophysicist at + lab

Common collocations
  • leading astrophysicist
  • young astrophysicist
  • theoretical astrophysicist
  • famous astrophysicist
Synonyms
  • astronomer

    broader word for a person who studies space, including observation and classification

  • physicist

    broader word for a physics expert in any area, not only space

  • cosmologist

    narrower word for someone studying the origin and structure of the universe as a whole

Grammar Patterns

an astrophysicist at + lab/university

become an astrophysicist

astrophysicist who + clause

Usage Note

Usually refers to a trained researcher or university expert. If someone mainly observes the sky without using physics to explain what they find, astronomer is often the broader word.

Common Mistakes

Leila trained as an astronomer who models black holes with equations.
Leila trained as an astrophysicist who models black holes with equations.
astronomer is broader; astrophysicist stresses physics-based study of space.
My cousin is an astrophysicist because he loves watching stars at night.
My cousin wants to study astrophysics, but he is not an astrophysicist yet.
the word usually suggests serious study or professional research.

Word family

Synonym discussion

Sense: noun/1

An astrophysicist studies space by using physics to explain how stars, planets, gas, or black holes behave. Astronomer is broader: an astronomer may observe the sky, classify objects, or collect data without focusing on physics-based models. Cosmologist is narrower and usually deals with the universe as a whole, such as its origin, expansion, or large-scale structure. Physicist is broader in the other direction, because a physicist may work on atoms, sound, or materials instead of space. Say 'The astrophysicist built a model of a black hole,' but 'The astronomer spent the night mapping a comet.'

astrophysicist ↗astronomer ↗cosmologistphysicist ↗

Common collocations

Nouns

  • leading astrophysicist
  • theoretical astrophysicist
  • famous astrophysicist

Phrases

  • become an astrophysicist
  • work as an astrophysicist

Prepositions

  • astrophysicist at + lab/university
  • astrophysicist from + country/city

Etymology

GreekEnglish

Astrophysicist was formed in modern English from astrophysics and the ending -ist, which names a person connected with a subject or activity. The astro- part comes from Greek astron, meaning 'star', and physics goes back to Greek physis, meaning 'nature'. The word therefore means a person who studies the physical nature of things in space.