Frederick James Hargreaves (February 10, 1891 – September 4, 1970) was a British

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 astronomer

Astronomer

An astronomer is a scientist who studies celestial bodies such as planets, stars and galaxies.Historically, astronomy was more concerned with the classification and description of phenomena in the sky, while astrophysics attempted to explain these phenomena and the differences between them using...

 and optician

Optician

An optician is a person who is trained to fill prescriptions for eye correction in the field of medicine, also known as a dispensing optician or optician, dispensing...

.

He was considered the foremost optician in Britain, and was noted for his skill in mirror making and other optics for astronomical telescope

Telescope

A telescope is an instrument that aids in the observation of remote objects by collecting electromagnetic radiation . The first known practical telescopes were invented in the Netherlands at the beginning of the 1600s , using glass lenses...

s. He also
made a series of observations and drawings of the turbulence in the belts and zones of Jupiter

Jupiter

Jupiter is the fifth planet from the Sun and the largest planet within the Solar System. It is a gas giant with mass one-thousandth that of the Sun but is two and a half times the mass of all the other planets in our Solar System combined. Jupiter is classified as a gas giant along with Saturn,...

's atmosphere.

He served as president of both the British Astronomical Association

British Astronomical Association

The British Astronomical Association is the senior national association of amateur astronomers in the UK.-Function:It encourages observational astronomy by non-professionals in areas which cannot be covered by professional observatories...

 and the Royal Astronomical Society

Royal Astronomical Society

The Royal Astronomical Society is a learned society that began as the Astronomical Society of London in 1820 to support astronomical research . It became the Royal Astronomical Society in 1831 on receiving its Royal Charter from William IV...

.

Awards and honors

• Awarded the Jackson-Gwilt Medal
  Jackson-Gwilt Medal
  The Jackson-Gwilt Medal of the Royal Astronomical Society has been awarded regularly since 1897 for the invention, improvement, or development of astronomical instrumentation or techniques; for achievement in observational astronomy; or for achievement in research into the history of astronomy.The...
  
   in 1938.
• The crater Hargreaves
  Hargreaves (crater)
  Hargreaves is a lunar crater that lies in the eastern part of the Moon, to the east of the Mare Fecunditatis. It is located to the west of the crater Maclaurin, and was previously designated Maclaurin S before being given a name by the IAU...
  
   on the Moon
  Moon
  The Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more...
  
  is named after him.