彼は天文学、すなわち星の研究をしている。の英語

He studies astronomy, or the science of stars.

My father studies astronomy, or the science of stars.

He was a great authority on astronomy, or the science of the heavenly bodies.

She dabbles in astronomy

Astronomy deals with the stars and planets.

Astronomy is the science of heavenly bodies.

I love astronomy.

They are very interested in astronomy.

They have an advanced knowledge of astronomy.

I love astronomy.

Ancient astronomers noticed constellations and gave them names.

a formidable knowledge of astronomy

Astronomers inferred the existence of a local supercluster.

J. Kepler, astronomer and mathematician, made a study of planets and their movements.

I have a knowledge of astronomy.

a physical science called sidereal astronomy

What's the difference between astronomy and astrology?

United States astronomer who discovered the planet Pluto (1906-1997)

Italian astronomer and mathematician who was the first to use a telescope to study the stars

English astronomer who pioneered radio astronomy (born in 1913)

Alexandrian astronomer (of the 2nd century) who proposed a geocentric system of astronomy that was undisputed until the late Renaissance

an institution that performs astronomical observation and research

United States astronomer who studied sunspots and nebulae (1818-1889)

United States mathematician and astronomer remembered for his studies of Uranus and Saturn and Neptune (1809-1880)

Navigation is an application of astronomy.

The geochemist studies the geology of the moon.

Planets move around a fixed star.

United States astronomer who developed a theory of stellar evolution (1877-1957)

the branch of astronomy that detects and studies the radio waves emitted by celestial bodies

They used an astrolabe to find the altitude of the sun and stars.