
	Where results make sense

Topic: Cepheids

In the News (Mon 16 Nov 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	ipedia.com: Astrometry Article (Site not responding. Last check: 2007-11-03)
		Another was the use of Cepheid variable stars to measure the distance to nebulae, which led to the discovery of other galaxies by Edwin Hubble.
		Hubble used triangulation on nearby Cepheids, and correlated the Cepheid's period to their absolute brightness.
		Hubble used Cepheids to discover and calibrate distance with the red shift shown by distant galaxies.
	www.ipedia.com /astrometry.html (362 words)

	Astronomer - Open Encyclopedia (Site not responding. Last check: 2007-11-03)
		Published Philosophiae Naturalis Principia Mathematica (1687), containing the "Newton's laws of motion", which are fundamental to mechanical physics, and which explained Kepler's laws of planetary motion.
		Catalogued Cepheid variable stars in the Magellanic Clouds, in 1912 discovered the relationship between luminosty and periodicity in Cepheids -- leading to Hertzprung's later work.
		determined the distance to several Cepheids, when Cepheids were detected in other galaxies such as the Andromeda galaxy, the distance to those galaxies could then be determined.
	open-encyclopedia.com /Astronomer (349 words)

	Data and Archive Centers
		The aim of the Double and Multiple Star Database of the Besançon Observatory is to provide a set of specific informations, as complete as possible, for different kinds of binary and multiple stars: visual, spectroscopic, photometric, interferometric, astrometric, by occultation, etc.
		The Database of Galactic Classical Cepheids is a project of J.
		Information includes positional data, color excess determinations, periods, amplitudes and means of V, B and B-V derived by Fourier fits to magnitude and intensity light curves, radial velocities, distances, Z values, etc. Simple string searches of the database are possible using WWW client software such as NCSA Mosaic.
	www.cv.nrao.edu /fits/www/yp_center.html (7173 words)

	The accuracy of the Genesis creation account. Pro old universe viewpoint. Favors the overlapping day/age view.
		For close stars they can use trigonometric parallax.
		They can measure the distance to nearby galaxies by studing special kinds of bright stars called Cepheids and even brighter ones called supernovas, all whose brightness oscillates.
		The longer the stars take to oscillate, the brighter they are, or would be if they weren't so far away.
	www.trustbible.com /creation.htm (2199 words)

Try your search on: Qwika (all wikis)