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Joseph Lade Pawsey
Joseph Lade Pawsey (14 May 1908 – 30 November 1962) was an Australian scientist, radiophysicist and radio astronomer. Education Pawsey was born in Ararat, Victoria to a family of farmers. At the age of 14 he was awarded a government scholarship to study at Wesley College, Melbourne, followed by a scholarship to study at the University of Melbourne. In 1929, he earned his Bachelor of Science degree from the university, followed by a Master of Science in Natural Philosophy in 1931. Pawsey was then awarded an Exhibition Research Scholarship to study at Sidney Sussex College, Cambridge, Sidney Sussex College at the University of Cambridge, where he worked under the direction of J.A. Ratcliffe. He studied the effects of the ionosphere on radio propagation and his discovery of the presence of irregularities in the Kennelly-Heaviside Layer proved vital to the later development of this branch of ionosphere, ionospheric physics. In 1935, he was awarded a PhD from Cambridge and in S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CSIRO
The Commonwealth Scientific and Industrial Research Organisation (CSIRO) is an Australian Government agency that is responsible for scientific research and its commercial and industrial applications. CSIRO works with leading organisations around the world. From its headquarters in Canberra, CSIRO maintains more than 50 sites across Australia as well as in France and the United States, employing over 6,500 people. Federally funded scientific research in Australia began in 1916 with the creation of the Advisory Council of Science and Industry. However, the council struggled due to insufficient funding. In 1926, research efforts were revitalised with the establishment of the Council for Scientific and Industrial Research (CSIR), which strengthened national science leadership and increased research funding. CSIR grew rapidly, achieving significant early successes. In 1949, legislative changes led to the renaming of the organisation as Commonwealth Scientific and Industrial Research ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Corona
In astronomy, a corona (: coronas or coronae) is the outermost layer of a star's Stellar atmosphere, atmosphere. It is a hot but relatively luminosity, dim region of Plasma (physics), plasma populated by intermittent coronal structures such as solar prominence, prominences, coronal loops, and helmet streamers. The Sun's corona lies above the chromosphere and extends millions of kilometres into outer space. Coronal light is typically obscured by diffuse sky radiation and Glare (vision), glare from the solar disk, but can be easily seen by the naked eye during a total solar eclipse or with a specialized coronagraph. Spectroscopic measurements indicate strong ionization in the corona and a plasma temperature in excess of , much hotter than the surface of the Sun, known as the photosphere. is, in turn, derived . History In 1724, French-Italian astronomer Giacomo F. Maraldi recognized that the aura visible during a solar eclipse belongs to the Sun, not to the Moon. In 1809, Span ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Forbes Martyn
David Forbes Martyn FAA FRS (27 June 1906 – 5 March 1970) was a Scottish-born Australian physicist and radiographer.R. W. Home,Martyn, David Forbes (1906–1970), ''Australian Dictionary of Biography'', National Centre of Biography, Australian National University. First published in ''Australian Dictionary of Biography'', Volume 15, (MUP), 2000. Education Martyn was educated at Plymouth College and Allan Glen's School, a school in Glasgow noted for its commitment to the teaching of science. In 1923, he entered the Royal College of Science at Imperial College London. Martyn was awarded a Bachelor of Science degree in 1926; a PhD in 1929; and a Doctor of Science degree in 1936. Career Martyn moved to Australia in 1927 to take up one of the first posts in radio research there. He contributed to the development of coastal and air defence RADAR for Australia during World War II. He was awarded the Thomas Ranken Lyle Medal of the Australian National Research Council in 1947 for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Noise
In radio reception, radio noise (commonly referred to as radio static) is unwanted random radio frequency electrical signals, fluctuating voltages, always present in a radio receiver in addition to the desired radio signal. Radio noise is a combination of natural electromagnetic atmospheric noise ("spherics", static) created by electrical processes in the atmosphere like lightning; human-made radio frequency interference () from other electrical devices picked up by the receiver's antenna (radio), antenna; and thermal noise present in the receiver input circuits, mostly caused by the random thermal motion of molecules inside resistors. Effects of noise on radio Radio noise near in frequency to a received radio signal (in the receiver's passband) radio frequency interference, interferes (radio frequency interference, ) with the operation of the receiver's circuitry. The level of noise determines the maximum sensitivity and reception range of a radio receiver; if no noise were pi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambridge University Press
Cambridge University Press was the university press of the University of Cambridge. Granted a letters patent by King Henry VIII in 1534, it was the oldest university press in the world. Cambridge University Press merged with Cambridge Assessment to form Cambridge University Press and Assessment under Queen Elizabeth II's approval in August 2021. With a global sales presence, publishing hubs, and offices in more than 40 countries, it published over 50,000 titles by authors from over 100 countries. Its publications include more than 420 academic journals, monographs, reference works, school and university textbooks, and English language teaching and learning publications. It also published Bibles, runs a bookshop in Cambridge, sells through Amazon, and has a conference venues business in Cambridge at the Pitt Building and the Sir Geoffrey Cass Sports and Social Centre. It also served as the King's Printer. Cambridge University Press, as part of the University of Cambridge, was a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sydney
Sydney is the capital city of the States and territories of Australia, state of New South Wales and the List of cities in Australia by population, most populous city in Australia. Located on Australia's east coast, the metropolis surrounds Sydney Harbour and extends about 80 km (50 mi) from the Pacific Ocean in the east to the Blue Mountains (New South Wales), Blue Mountains in the west, and about 80 km (50 mi) from Ku-ring-gai Chase National Park and the Hawkesbury River in the north and north-west, to the Royal National Park and Macarthur, New South Wales, Macarthur in the south and south-west. Greater Sydney consists of 658 suburbs, spread across 33 local government areas. Residents of the city are colloquially known as "Sydneysiders". The estimated population in June 2024 was 5,557,233, which is about 66% of the state's population. Estimated resident population, 30 June 2017. The city's nicknames include the Emerald City and the Harbour City. There is ev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Collaroy Plateau
Collaroy Plateau is a suburb of northern Sydney, in the state of New South Wales, Australia. Collaroy Plateau is 22 kilometres north-east of the Sydney central business district, in the Local government in Australia, local government area of Northern Beaches Council and is part of the Northern Beaches region. Collaroy Plateau was designated as a separate suburb in 1977 with a postcode of 2098, but was reassigned as a locality within Collaroy in 1984, with the postcode changing to 2097 as part of Collaroy. In 2001 all localities were renamed Urban Places. In 2011 Collaroy Plateau, along with Wheeler Heights, was re-established as a suburb by the Geographical Names Board of NSW, after lobbying by the community, who had never ceased considering it to be a suburb since its loss of that title in 1984. Collaroy Plateau has views of Sydney's Northern Beaches, with parts of the suburb overlooking Collaroy, New South Wales, Collaroy Beach, Long Reef Beach, Narrabeen, New South Wales, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Australian Air Force
The Royal Australian Air Force (RAAF) is the principal Air force, aerial warfare force of Australia, a part of the Australian Defence Force (ADF) along with the Royal Australian Navy and the Australian Army. Constitutionally the Governor-General of Australia, governor-general of Australia is the de jure commander-in-chief of the Australian Defence Force. The Royal Australian Air Force is commanded by the Chief of Air Force (Australia), Chief of Air Force (CAF), who is subordinate to the Chief of the Defence Force (Australia), Chief of the Defence Force (CDF). The CAF is also directly responsible to the Minister for Defence (Australia), Minister for Defence, with the Department of Defence (Australia), Department of Defence administering the ADF and the Air Force. Formed in March 1921, as the Australian Air Force, through the separation of the Australian Air Corps from the Army in January 1920, which in turn amalgamated the separate aerial services of both the Army and Navy. It d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ruby Payne-Scott
Ruby Violet Payne-Scott (28 May 1912 – 25 May 1981) was an Australian pioneer in radiophysics and radio astronomy, and was one of two Antipodean women pioneers in radio astronomy and radio physics at the end of the second world war, Ruby Payne-Scott the Australian and Elizabeth Alexander the New Zealander. Early life and education Ruby Payne-Scott was born on 28 May 1912 in Grafton, New South Wales, the daughter of Cyril Payne-Scott and his wife Amy (née Neale). She later moved to Sydney to live with her aunt. There she attended the Penrith Public Primary School (1921–24), and the Cleveland-Street Girls' High School (1925–26), before completing her secondary schooling at Sydney Girls High School. Her school leaving certificate included honours in mathematics and botany. She won two scholarships to undertake tertiary education at the University of Sydney, where she studied physics, chemistry, mathematics and botany. She earned a BSc in 1933—the third woman to graduat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Milky Way
The Milky Way or Milky Way Galaxy is the galaxy that includes the Solar System, with the name describing the #Appearance, galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars in other arms of the galaxy, which are so far away that they cannot be individually distinguished by the naked eye. The Milky Way is a barred spiral galaxy with a Galaxy#Isophotal diameter, D25 isophotal diameter estimated at , but only about 1,000 light-years thick at the spiral arms (more at the bulge). Recent simulations suggest that a dark matter area, also containing some visible stars, may extend up to a diameter of almost 2 million light-years (613 kpc). The Milky Way has several List of Milky Way's satellite galaxies, satellite galaxies and is part of the Local Group of galaxies, forming part of the Virgo Supercluster which is itself a component of the Laniakea Supercluster. It is estimated to contain 100–400 billion stars and at least that number of pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Astronomy
Radio astronomy is a subfield of astronomy that studies Astronomical object, celestial objects using radio waves. It started in 1933, when Karl Jansky at Bell Telephone Laboratories reported radiation coming from the Milky Way. Subsequent observations have identified a number of different sources of radio emission. These include stars and galaxy, galaxies, as well as entirely new classes of objects, such as Radio galaxy, radio galaxies, quasars, pulsars, and Astrophysical maser, masers. The discovery of the cosmic microwave background radiation, regarded as evidence for the Big Bang, Big Bang theory, was made through radio astronomy. Radio astronomy is conducted using large Antenna (radio), radio antennas referred to as ''radio telescopes'', that are either used alone, or with multiple linked telescopes utilizing the techniques of Astronomical interferometer, radio interferometry and aperture synthesis. The use of interferometry allows radio astronomy to achieve high angular resolu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
