John Stefanos Paraskevopoulos (June 20, 1889 – March 15, 1951) also known as John Paras, was a Greek/South African astronomer. He was born in Piraeus, Greece and graduated from the University of Athens, where he obtained his PhD in Physics in 1910, under the supervision of Timoleon A. Argyropoulos. He served in the Greek army during the Balkan Wars and World War I. He work as an assistant of Prof. Demetrios Eginitis at the National Observatory of Athens, and in 1919, he went to the US with a two-year fellowship, spending part of that time working at Yerkes Observatory. There he met and married Dorothy W. Block. In 1921, he returned to Athens where he became head of the astronomy department of the National Observatory of Athens with a goal to built a large telescope in Greece. However, due to the war between Greece and Turkey during that period and the political instability that followed it soon became evident that the large telescope for the observatory would not materialise. So, in September 1923 Dr Paras accepted an offer from Dr Harlow Shapley, to become the Superintendent of the Harvard Observatory's Southern Station. He left this post due to a lack of funding and went to Arequipa, Peru to work at Boyden Station, a branch of Harvard Observatory, with a view to finding a more suitable location for it. The decision was made to move Boyden Station to South Africa due to better weather conditions, and Paraskevopoulos served there as director of Boyden Observatory in South Africa from 1927 to 1951. He co-discovered a couple of comets. The crater Paraskevopoulos on the Moon is named after him.
An astronomer is a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth. They observe astronomical objects such as stars, planets, moons, comets, and galaxies – in either observational or theoretical astronomy. Examples of topics or fields astronomers study include planetary science, solar astronomy, the origin or evolution of stars, or the formation of galaxies. Related but distinct subjects like physical cosmology, which studies the Universe as a whole.
Piraeus is a port city in the region of Attica, Greece. Piraeus is located within the Athens urban area, 12 kilometres southwest from its city centre, and lies along the east coast of the Saronic Gulf.
Greece, officially the Hellenic Republic, self-identified and historically known as Hellas, is a country located in Southern and Southeast Europe, with a population of approximately 11 million as of 2016. Athens is the nation's capital and largest city, followed by Thessaloniki.
57P/du Toit–Neujmin–Delporte is the designation of a periodic comet. In 2002 it was discovered to have broken up into at least 19 fragments.
Daniel Stefanus du Toit was a South African astronomer.
Boyden Observatory is an astronomical research observatory and science education centre located in Maselspoort, 20 kilometres (12 mi) north-east of the city of Bloemfontein in Free State, South Africa. The observatory is managed by the Physics Department of the University of the Free State (UFS). The Friends of Boyden assist the observatory as a public support group, organising open evenings and protecting its public interest. Boyden also makes use of members of ASSA Bloemfontein Centre, the amateur astronomy club of the city, for presenters and telescope assistants.
Cyril V. Jackson was a South African astronomer, born in Ossett, Yorkshire in England, but his father emigrated to South Africa in 1911.
Andrew Ainslie Common FRS (1841–1903) was an English amateur astronomer best known for his pioneering work in astrophotography.
Henrietta Hill Swope was an American astronomer who studied variable stars. In particular, she measured the period-luminosity relation for Cepheid stars, which are bright variable stars whose periods of variability relate directly to their intrinsic luminosities. Their measured periods can therefore be related to their distances and used to measure the size of the Milky Way and distances to other galaxies.
Uriah Atherton Boyden was a civil and mechanical engineer and inventor from Foxborough, Massachusetts best known for the development of the Boyden Turbine around 1844, while working for the Appleton Company in Lowell, Massachusetts. Boyden improved upon the water turbine developed by French engineer Fourneyron by adding a conical approach passage for the incoming water—submerged diffusers, guide vanes and a diverting exit passage.
Solon Irving Bailey was an American astronomer and discoverer of the main-belt asteroid 504 Cora, on June 30, 1902.
A. David Andrews is an Irish astronomer. He studied at Oriel College Oxford and University of Dublin. He spent the early 1960s in Denmark working with the astrophysicist M. Rudkjobing at the Aarhus Observatory. He moved on in 1963 to Armagh Observatory in Northern Ireland where he spent the next 35 years. Dr Andrews discovered the minor planet 1727 Mette whilst at the Boyden Observatory located in Bloemfontein, South Africa, where he was Acting Director. It was while at Boyden Observatory that he commenced his lifelong work on flare stars. He was the first to make full use of computers, in 1968, at Armagh Observatory. Andrews was Editor of the Irish Astronomical Journal following Ernst Öpik, and in 1967 became a founder member of Commission 27 Working Group on Flare Stars of the International Astronomical Union.
South African Astronomical Observatory (SAAO) is the national centre for optical and infrared astronomy in South Africa. It was established in 1972. The observatory is run by the National Research Foundation of South Africa. The facility's function is to conduct research in astronomy and astrophysics. The primary telescopes are located in Sutherland, which is 370 kilometres (230 mi) from Observatory, Cape Town, where the headquarters is located.
Eric Mervyn Lindsay FRAS was an Irish astronomer.
Royal Harwood Frost was an American astronomer, born in Salem, Massachusetts to Albinus Finney Frost and Emma Jane Richardson, the fourth son of a family of ten.
The National Observatory of Athens is a research institute in Athens, Greece. Founded in 1842, it is the oldest research foundation in Greece, as it was the first scientific research institute built after Greece became independent in 1829, and one of the oldest research institutes in Southern Europe.
The University of Illinois Astronomical Observatory, located at 901 S. Mathews Avenue in Urbana, Illinois, on the campus of the University of Illinois at Urbana–Champaign, was built in 1896, and was designed by Charles A. Gunn. It has been listed on the National Register of Historic Places since November 6, 1986, and on December 20, 1989, was designated a National Historic Landmark.
Merieme Chadid is a Moroccan-French astronomer, explorer and researcher at the University of Nice Sophia Antipolis. In 2005, she led an international polar scientific program and has been committed to installing a major astronomical observatory at the heart of Antarctica.
The Mills Observatory in Dundee, Scotland, is the first purpose-built public astronomical observatory in the UK. Built in 1935, the observatory is classically styled in sandstone and has a distinctive 7 m dome, which houses a Victorian refracting telescope, a small planetarium, and display areas. The dome is one of two made from papier-mâché to survive in the UK, the other being at the Godlee Observatory.
Leonidas Paraskevopoulos was a senior Greek military officer and politician. He played a major role in Greece's war effort during World War I, and was the commander-in-chief of the Greek Army of Asia Minor in 1919–20. In later life he was a member of the Greek Senate and served as its speaker in 1930–32.
Roger Lowell Putnam was an American politician and businessman. A member of the prominent Lowell family of Boston, he served as Mayor of Springfield, Massachusetts, from 1937 until 1943, and as director of the Economic Stabilization Administration from 1951 until 1952. During his short tenure in federal office, the nation's steelworkers struck—leading United States President Harry S. Truman to seize the nation's steel mills.
Dionysios A. Zakythinos or Zakythenos was a leading Greek Byzantinist.
Belgrade Observatory is an astronomical observatory located in the eastern part of Belgrade, Serbia, in the natural environment of Zvezdara Forest.