An early pioneer of radio astronomy was Grote Reber, an amateur astronomer who constructed the first purpose built radio telescope in the late 1930s to follow up on the discovery of radio wavelength emissions from space by Karl Jansky.

This word was first used by Robert Blair ( d. 1828 ), professor of practical astronomy at Edinburgh University, to characterize a superior achromatism, and, subsequently, by many writers to denote freedom from spherical aberration.

Greek astronomy essentially adopted the older Babylonian system in the Hellenistic era, first introduced to Greece by Eudoxus of Cnidus in the 4th century BC.

He was the son of Sarah Hunt Mills and Benjamin Peirce, himself a professor of astronomy and mathematics at Harvard University and perhaps the first serious research mathematician in America.

The first person to provide evidence and infer the presence of dark matter was Dutch astronomer Jan Oort, a pioneer in radio astronomy, in 1932.

Hubble was also a dutiful son, who despite his intense interest in astronomy since boyhood, surrendered to his father ’ s request to study law, first at the University of Chicago and later at Oxford, though he managed to take a few math and science courses.

Modern scholars refer to him as a major source on Greek mythology, farming techniques, early economic thought ( he is sometimes identified as the first economist ), archaic Greek astronomy and ancient time-keeping.

" Therefore, although the thesis of the " Mysterium Cosmographicum " was in error, modern astronomy owes much to this work " since it represents the first step in cleansing the Copernican system of the remnants of the Ptolemaic theory still clinging to it.

Then he went to hear a Pythagorean philosopher, who demanded that he first learn music, astronomy and geometry, which he did not wish to do.

This was an important contribution to astronomy and the philosophy of science and some scholars have thus referred to this new approach as the first scientific revolution.

It is, indeed, presented as the second part of the study of astronomy of which the Almagest was the first, concerned with the influences of the celestial bodies in the sublunar sphere.

The first star catalogue in Greek astronomy was created by Aristillus in approximately 300 BC, with the help of Timocharis.

::“ It is truly a whimsical supposition that, if mankind were agreed in considering utility to be the test of morality, they would remain without any agreement as to what is useful, and would take no measures for having their notions on the subject taught to the young, and enforced by law and opinion … to consider the rules of morality as improvable, is one thing ; to pass over the intermediate generalisations entirely, and endeavour to test each individual action directly by the first principle, is another … The proposition that happiness is the end and aim of morality, does not mean that no road ought to be laid down to that goal … Nobody argues that the art of navigation is not founded on astronomy, because sailors cannot wait to calculate the Nautical Almanack.

According to the commentators, Virgil received his first education when he was five years old and he later went to Cremona, Milan, and finally Rome to study rhetoric, medicine, and astronomy, which he soon abandoned for philosophy.

The division of the ecliptic into the zodiacal signs originates in Babylonian (" Chaldean ") astronomy during the first half of the 1st millennium BC, likely during Median /" Neo-Babylonian " times ( 7th century BC ),

* April 24 – Patrick Moore presents the first episode of The Sky at Night, a BBC television programme for astronomy enthusiasts.

* 1267 – Roger Bacon completes his work Opus Majus and sends it to Pope Clement IV, who had requested it be written ; the work contains wide-ranging discussion of mathematics, optics, alchemy, astronomy, astrology, and other topics, and includes what some believe to be the first description of a magnifying glass.

The first three volumes of the Course dealt chiefly with the physical sciences already in existence ( mathematics, astronomy, physics, chemistry, biology ), whereas the latter two emphasised the inevitable coming of social science: " sociologie ".

* Roger Bacon completes his work Opus Majus and sends it to Pope Clement IV, who had requested it be written ; the work contains wide-ranging discussion of mathematics, optics, alchemy, astronomy, astrology, and other topics, and includes what some believe to be the first description of a magnifying glass.

In August 1665, at the age of nineteen and as a gift for his friend Litchford, Flamsteed wrote his first paper on astronomy, entitled Mathematical Essays, concerning the design, use and construction of an astronomer's quadrant, including tables for the latitude of Derby.

The development of radio astronomy, infrared astronomy and submillimeter astronomy in the 20th Century allowed the gas and dust of the Milky Way to be mapped for the first time.

The first X-ray telescope in astronomy is used to observe the Sun.

He first worked with real computers while studying astronomy at the Summer Science Program in 1964.

In stellar and galactic astronomy, the standard distance is 10 parsecs ( about 32. 616 light years, or 3 × 10 < sup > 14 </ sup > kilometres ).

The discovery of the aberration of light in 1725 by James Bradley was one of the most important in astronomy.

* Aurora ( astronomy ), a natural light display in the sky

In astronomy for example, a photometric aperture around a star usually corresponds to a circular window around the image of a star within which the light intensity is assumed.

Infrared astronomy began in the 1830s, a few decades after the discovery of infrared light by William Herschel in 1800.

Infrared and optical astronomy are often practiced using the same telescopes, as the same mirrors or lenses are usually effective over a wavelength range that includes both visible and infrared light.

* 1953-Erwin Finlay-Freundlich in support of his tired light theory, derives a blackbody temperature for intergalactic space of 2. 3K with comment from Max Born suggesting radio astronomy as the arbitrator between expanding and infinite cosmologies.

In astronomy, a light curve is a graph of light intensity of a celestial object or region, as a function of time.

The Moon not only provides light at night, allowing the time to still be measured without the sun, but its phases and prominence gave it a significant importance in early astrology / astronomy.

simple: First light ( astronomy )

Hindu astrology ( also known as Indian astrology, more recently Vedic astrology, also Jyotish or Jyotisha, from Sanskrit, from " light, heavenly body ") is the traditional Hindu system of astronomy and astrology.

Within visible-light astronomy, the visibility of celestial objects in the night sky is affected by light pollution.

The glow provided by artificial illumination is sometimes referred to as light pollution because it can interfere with observational astronomy and ecosystems.

The increasing light pollution due to the growth of greater Los Angeles has limited the ability of the observatory to engage in deep space astronomy, but it remains a productive center, with many new and old instruments in use for astronomical research.

* Telescope, light magnification ( astronomy )

* Background ( astronomy ), small amounts of light coming from otherwise dark parts of the sky

In astronomy, background commonly refers to the incoming light from an apparently empty part of the night sky.

In infrared astronomy, the problem can be much worse: due to the longer wavelengths involved, the sky and the telescope themselves are a source of light.

The introduction of the CCD into astronomy, which captures more than 70 % of the light, lowered the bar on practical applications enormously, and today the technique is widely used on bright astronomical objects ( e. g. stars and star systems ).

The Airy function is also important in microscopy and astronomy ; it describes the pattern, due to diffraction and interference, produced by a point source of light ( one which is smaller than the resolution limit of a microscope or telescope ).

The manuscript does not take the form of a single linear script, but is rather a mixture of Leonardo's observations and theories on astronomy ; the properties of water, rocks, and fossils ; air, and celestial light.

It is difficult for humans to see H-alpha at night, but due to the abundance of hydrogen in space, H-alpha is often the brightest wavelength of visible light in stellar astronomy.

* Optical astronomy is the part of astronomy that uses optical components ( mirrors, lenses and solid-state detectors ) to observe light from near infrared to near ultraviolet wavelengths.