interstellar scintillation

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• Quasar J1819+3845 — Quasar name = QSO J1819+3845 epoch = J2000 ra = RA|18|19|26.55 dec = DEC|+38|45|01.8 [http://simbad.u strasbg.fr/simbad/sim id?protocol=html Ident=QSO+J1819%2B3845+ NbIdent=1 Radius=2 Radius.unit=arcmin submit=submit+id Simbad] ] constellation… …   Wikipedia

• Active SETI — A representation of the 1679 bit Arecibo message. Active SETI (Active Search for Extra Terrestrial Intelligence) is the attempt to send messages to intelligent aliens. Active SETI messages are usually in the form of radio signals. Physical… …   Wikipedia

• Wow! signal — The WOW! Signal. The Wow! signal was a strong narrowband radio signal detected by Dr. Jerry R. Ehman on August 15, 1977, while working on a SETI project at the Big Ear radio telescope of The Ohio State University then located at Ohio Wesleyan… …   Wikipedia

• Antony Hewish — Infobox Scientist name = Antony Hewish image width = 150px caption = Antony Hewish birth date = May 11, 1924 (age 84) nationality = United Kingdom field = Radio astronomy known for = Pulsars religion = Christian prizes = Nobel Prize for Physics… …   Wikipedia

• Pulsar — Pulsars are highly magnetized rotating neutron stars that emit a beam of electromagnetic radiation in the form of radio waves. Their observed periods range from 1.4 ms to 8.5 s. [ M.D. Young, R.N. Manchester and S. Johnston. A radio pulsar with… …   Wikipedia

• List of astronomy acronyms — This is a compilation of acronyms commonly used in astronomy. Most of the acronyms are drawn from professional astronomy and are used quite frequently in scientific publications. However, a few of these acronyms are frequently used by the general …   Wikipedia

• Cosmic ray — For the film, see Cosmic Ray (film). Cosmic radiation redirects here. For some background types of cosmic radiation, see cosmic background radiation and cosmic background. The energy spectrum for cosmic rays Cosmic rays are energetic charged… …   Wikipedia

• electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… …   Universalium

• X-ray astronomy — X rays start at 0.008 nm and extend across the electromagnetic spectrum to 8 nm, over which the Earth s atmosphere is opaque. X ray astronomy is an observational branch of astronomy which deals with the study of X ray observation and detection… …   Wikipedia

• Solar wind — For other uses, see Solar wind (disambiguation). The solar wind is a stream of charged particles ejected from the upper atmosphere of the Sun. It mostly consists of electrons and protons with energies usually between 1.5 and 10 keV. The stream of …   Wikipedia

• Hewish , Antony — (1924–) British radio astronomer Hewish was born at Fowey in Cornwall, and studied at Cambridge University. He obtained his BA in 1948 and his PhD in 1952 after wartime work with the Royal Aircraft Establishment, Farnborough. He lectured in… …   Scientists