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Observatories in Earth Orbit and Beyond
When I became President of International Astronomical Union Commission 44 for the triennial period 1985-1988, several members of the Organizing Committee and I agreed that it would be a good idea for our Commission to host a conference on observatories in space in view of their increasingly important role in astronomi cal research. IAU Colloquium Number 123 "Observatories in Earth Orbit and Beyond" is the first colloquium sponsored by IAU Com mission 44 on Astronomy from Space, although Commission 44 has co-sponsored numerous colloquia and symposia in the past. The past two decades have seen a flourishing of astronomical observatories in space. Over a dozen orbiting observatories have opened...
Coveys of Birds
Johann Ludwig Barth (John Lewis Bird) arrived in Philadelph in 1749; between 1752 and 1769, he moved to Frederick County, Virginia. His son, John Bird, was probably born in Frederick County, Virginia. He married Catherine Frey, daughter of John Frey/Fry, in 1782. He died in Shenandoah County, Virginia, ca. 1829. Descendants lived in Virginia, Tennessee, and elsewhere.
Indianapolis Monthly
Indianapolis Monthly is the Circle City’s essential chronicle and guide, an indispensable authority on what’s new and what’s news. Through coverage of politics, crime, dining, style, business, sports, and arts and entertainment, each issue offers compelling narrative stories and lively, urbane coverage of Indy’s cultural landscape.
Radio Galaxies at TeV Energies
It is common believe that the centers of all galaxies exhibit supermassive black holes with masses ranging from millions up to billions of the mass of our Sun. By accreting surrounding matter, the luminosity of these galactic nuclei can outshine the emission of their host galaxies. If this is the case, they are called active galactic nuclei. Some of these objects eject powerful outflows composed of plasma, called jets. These jets can produce non-thermal radiation which observable across the entire electromagnetic spectrum from radio up to the gamma-ray frequencies. At highest frequencies (TeV range) most of the detected active galaxies have jets directed along or close to the line of sight. ...
Indianapolis Monthly
Indianapolis Monthly is the Circle City’s essential chronicle and guide, an indispensable authority on what’s new and what’s news. Through coverage of politics, crime, dining, style, business, sports, and arts and entertainment, each issue offers compelling narrative stories and lively, urbane coverage of Indy’s cultural landscape.
