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Astronomy is a natural science which is the study of celestial objects (such as stars, galaxies, planets, moons, asteroids, comets and nebulae), the physics...

aids in the observation of remote objects by collecting electromagnetic radiation (such as visible light). The first known practical telescopes were invented...

galactic nuclei are the most luminous persistent sources of electromagnetic radiation in the universe. We seem to live in a remarkably economical X-ray universe...

laureate in physics, for having discovered the cosmic microwave background radiation. A closed universe, one that explodes, expands, falls back on itself and...

of attenuated ionized gases. These nebulae are often dusty, heated by radiation fields and by shocks. They are short-lived phenomena on the scale of a...

Hoyle–Narlikar theory. Guru: Today I will discourse upon the violence in astronomy. Disciple: Revered Sir! Will you be describing the violent phenomenon...

Pike's Peak for the sake of making absorption experiments upon these radiation at the highest altitude to which we could carry large quantities of absorbing...

the official indoctrination of the purpose of nuclear 'power' stations, radiation health risks, the 'need' for further nuclear weapons and the reality of...

including theories describing the behavior of aurorae, the Van Allen radiation belts, the effect of magnetic storms on the Earth's magnetic field, the...

Martis ex observationibus G.V. Tychonis Brahe. Title translations: New Astronomy, Based upon Causes, or Celestial Physics, Treated by Means of Commentaries...

In general, gamma rays are the perfect companions for multi-messenger astronomy ... gamma-ray production is intimately related to the production of CRs...

gives rise to a secondary radiation by impact against the cosmic dust scattered through space. It is the secondary radiation which now is commonly called...

of matter and radiation, the matter consisting of atoms and the radiation of waves. Planck's theory called for an atomicity of radiation similar to that...

of Mercury in the EUV (extreme ultraviolet radiation). In addition, Venus, and hydrogen and helium radiation emanating from outside the Solar System were...

the radiation of the stars. It would not be correct, however, to conclude that the expansion is caused by the energy thus lost by the radiation... It...

is Earth. J. G. Ballard in: Michael Seeds, Dana Backman Foundations of Astronomy, Cengage Learning, 1 January 2012, p. 472 The fact that this chain of...

beginning, the establishment of first ties between general relativity and astronomy was a tedious exercise involving only a small number of bridge builders...

discovering Uranus. He also discovered infrared radiation and made many other contributions to astronomy. His sister Caroline Herschel and son, Sir John...

until towards the end of the eighteenth century. Until then, stellar astronomy was a field left to the unaided imagination. Although the classic theoretical...

all sorts of sad things. Tycho Brahe in: Patrick Moore's Data Book of Astronomy, Cambridge University Press, 10 Febrauary 2011, p. 336. The universe is...