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.
The International Astronomical Union exists to promote and safeguard the science of astronomy through international cooperation, assign official names and designations to celestial bodies, and liaise with organizations that include amateur astronomers. Founded in 1919 and based in Paris, the IAU is a member of the International Science Council (ISC).
The Actors' Equity Association (AEA), commonly referred to as Actors' Equity or simply Equity, is an American labor union representing the world of live theatrical performance, as opposed to film and television performance. However, performers appearing on live stage productions without a book or through-storyline may be represented by the American Guild of Variety Artists (AGVA). As of 2010, Equity represented over 49,000 theatre artists and stage managers.
In astronomy, an astronomical object or celestial object is a naturally occurring physical entity, association, or structure that exists in the observable universe. In astronomy, the terms object and body are often used interchangeably. However, an astronomical body or celestial body is a single, tightly bound, contiguous entity, while an astronomical or celestial object is a complex, less cohesively bound structure, which may consist of multiple bodies or even other objects with substructures.
The Quadrantids (QUA) are a January meteor shower. The zenithal hourly rate (ZHR) of this shower can be as high as that of two other reliably rich meteor showers, the Perseids in August and the Geminids in December, yet Quadrantid meteors are not seen as often as meteors in these other two showers, because the peak intensity is exceedingly sharp, sometimes lasting only hours. Additionally, the meteors are quite faint.
PSA, PsA, Psa, or psa may refer to:
Uia is a locality in the Marquesas Islands.
The Islamic Azad University is a private university system in Iran. It is one of the largest comprehensive systems of universities, colleges, and community colleges in the world.
Sainudeen Pattazhy is Associaate professor zoology, now working at the University of Kerala, Karyavattom Campus, Thiruvananthapuram who comes from Kerala, India.
Shaikh Mohammad Razaullah Ansari is a historian of science, physicist, astronomer and author from India.
Al-Mustafa International University (MIU) is an international academic, Islamic and university-style seminary institute in Qom, Iran established in 1979. It has international branches and affiliate schools.
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