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What is Right ascension? This is the term astronomer’s use for one of the two coordinates of a point right on the celestial sphere when using the equatorial coordinate system. The other coordinate is referred to as declination. It is said that the concept of RA has been known since the time of Hipparchus. It […]
There are a lot of things that has been said about our galaxy. There is no doubt that increased magnification would give you a beautiful view of celestial bodies, the Moon, the planets and details of sky objects. To see them properly, a Rich field telescope would come in handy. This is a fast focal
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One of the three major macromolecules along with DNA and proteins is Ribonucleic acid (RNA). These are essential for all forms of life. RNA is made up of nucleotides, and each nucleotide consists of a nucleobase which is also known as a nitrogenous base. Nucleic acids were discovered in 1868 by Friedrich Miescher,
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In the solar system most of the rotational and orbital motions are in the eastward direction. This is referred to as direct motion. Those in the opposite direction are called retrograde. There are three types of retrograde motion in astronomy. Planets, as scientists have noted move relative to the stars, moving from west to east
Photo by: ArtMechanic Creative Commons Newtonian telescope is a kind of reflecting telescope that has a concave primary mirror and a flat secondary mirror. It is patterned after the telescope invented by Sir Isaac Newton, the famous British astronomer and scientist who during the 17th century.
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The Nebulae and Clusters of Stars NGC, or New General Catalogue is a list or catalogue of deep sky objects. It was first compiled by a person named J. L. E. Dreyer in 1888, using observed data from various astronomers, among them William Herschel and his son, and James Dunlop. Dreyer was commissioned by the
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What are extragalactic objects, and why study them? Extragalactic objects give us a hint on what the universe really is like. Extragalactic objects are, simply put, all astronomical objects outside of the Milky Way.
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Since long ago, people have determined time by looking at the skies and the astronomical events that occur. You already know that the rotation of the earth defines day and night while the revolution of the earth around the sun causes different seasons and also determines a “year”. However, with the advances in technology, scientists
Photo by: Tamasflex Creative Commons The eye relief is an important concept in the use of equipments like a telescope, microscope, or binoculars. By definition, eye relief is the distance from the eye piece at which the eye can be placed to the entrance pupil of the eye. Instruments with short eye relief will require
All of us may have considered what if we aren?t the only intelligent form of life in the universe. What if, light years away, are living beings who think and act like us? Or maybe beings with way, way advanced technology, and are studying us from afar? Some people doubt the existence of extraterrestrial life,
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