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Topic: Binary system (astronomy)

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	Astronomy Notes
		Astronomy as a Science and a Sense of Scale.
		I define angular momentum and give several examples of angular momentum in astronomy: Kepler's second law of orbital motion, Earth-Moon system, rapidly spinning neutron stars, accretion disk in a binary system, and a collapsing galactic cloud.
		Astronomy constants, physical constants, planets (orbital properties, physical characteristics, atmospheres), 100 nearest stars, and 100 brightest stars as seen from the Earth.
	www.astronomynotes.com (1546 words)

	SPACE.com -- Supernova Nearly Split Binary Star System
		Astronomers have discovered a double star system, known as a massive X-ray binary, with an orbit so elongated that the twosome appears to have barely survived the disruptive effects of the supernova that transformed them into a fountain of X-ray energy.
		X-ray binary systems consist of a star that is losing mass to its partner, which is the remnant of a supernova, either a neutron star or a fl hole.
		McSwain's observations confirm that LS 5039 is a close X-ray binary system: one extremely bright, massive star and a companion that is nearly invisible to human eyes, which marks the remains of the stellar explosion.
	www.space.com /scienceastronomy/astronomy/xray_binary_010828.html (819 words)

	Binary system (astronomy)
		A binary system is an astronomy term referring to two objects in space - usually stars, but may be planets or asteroids - which are so close that their gravitational forces attract one another other about a common center of mass that is not located within the interior of either object.
		See Binary star for the common case of a binary system composed of two stars, double planet and Binary asteroid.
		Sometimes, a binary system consists of a large dim star and a small bright one, causing fluctuations in brightness of the system.
	www.guideofpills.com /Binary_system_(astronomy).html (470 words)

	Jodrell Bank Observatory Pulsar Group
		A Binary Millisecond Pulsar in Globular Cluster NGC6544 - ApJL
		Optical observations of the binary millisecond pulsars J2145-0750 and J0034-0534.
		Millisecond pulsars in the globular cluster 47 Tucanae - MNRAS
	www.jb.man.ac.uk /~pulsar/Publications/publications.html (4498 words)

	Binary Stars
		Spectroscopic binaries are systems in which the stars are so close together that they appear as a single star even in a telescope.
		The binary nature of the system is deduced from the periodic doppler shifts of the wavelengths of lines seen in the spectrum, as the stars move through their orbits around the center of mass.
		Eclipsing binaries are systems in which the orbital plane is oriented exactly edgewise to the plane of the sky so that the one star passes directly in front of the other, blocking out its light during the eclipse.
	astrosun2.astro.cornell.edu /academics/courses/astro201/binstar.htm (307 words)

	Binary Stars (Site not responding. Last check: )
		Spectroscopic binaries are systems in which the stars are so close together that they appear as a single star even in a telescope.
		The binary nature of the system is deduced from the periodic doppler shifts of the wavelengths of lines seen in the spectrum, as the stars move through their orbits around the center of mass.
		Eclipsing binaries are systems in which the orbital plane is oriented exactly edgewise to the plane of the sky so that the one star passes directly in front of the other, blocking out its light during the eclipse.
	www.astro.cornell.edu /academics/courses/astro201/binstar.htm (307 words)

	Imagine the Universe! Dictionary A-D
		An X-ray binary is a special case where one of the stars is a collapsed object such as a white dwarf, neutron star, or fl hole, and the separation between the stars is small enough so that matter is transferred from the normal star to the compact star star, producing X-rays in the process.
		This is analogous to the second law of thermodynamics, with the surface areas of the fl holes being a measure of the entropy of the system.
		A system of galaxies containing from a few to a few thousand member galaxies which are all gravitationally bound to each other.
	imagine.gsfc.nasa.gov /docs/dict_ad.html (2544 words)

	Astronomy Dictionary Page
		Astronomy-The study of the position and movements of celestial objects in space.
		Astronomical Unit-Unit of measure used to measure distance in the Solar System.
		Calendar-Various systems of timekeeping that track the beginning, length, and divisions of a year.
	www.astronomy-for-kids-online.com /astronomydictionary.html (687 words)

	Solar system: Encyclopedia II - Solar system - Planetary system formation
		For many years, our solar system had the only planetary system known, and so theories of planetary formation only had to explain one system to be plausible.
		Many extrasolar planetary systems contain such a “hot Jupiter”: a planet comparable to or larger than Jupiter orbiting very close to the parent star, perhaps orbiting it in a matter of days.
		It has been hypothesised that while the giant planets in these systems formed in the same place as the gas giants in our system did, some sort of migration took place which resulted in the giant planet spiralling in towards the parent star.
	www.experiencefestival.com /a/Solar_system_-_Planetary_system_formation/id/599734 (472 words)

	Register a star - Adopt a star - Unique personalized gifts - Name a star - Purchasing star
		Two Star Certificates showing the new name(s) of the binary star system, the date of registration, the telescopic coordinates and the message you dedicate to the recipient(s) (8.5"x11").
		Astronomy software — Virtual Planetarium™ is a software suite that includes a library of stunning astronomy imagery — new Hubble, Spitzer and Mars images; information about the sky, the solar system and the latest space events; and space weather reports about sun spots, auroras and more.
		Astronomy e-book — What's Up 2006 - 365 Days of Skywatching — a daily guide to the night sky for 2006.
	www.nameastarlive.com /binaryFramed.asp (546 words)

	Astronomy for kids online takes you on a tour of the stars and space.
		You will learn everything you ever wanted to know about Astronomy and outer space, and you will find out that the Earth is really just a tiny speck in the great expanse we call the universe.
		Observational astronomy is the division of astronomy that studies events and objects in space that can be seen and those that can't be seen.
		Astronomy experiments for kids are easy to do and fun too.
	www.astronomy-for-kids-online.com (646 words)

	Units: The International System
		All systems of weights and measures, metric and non-metric, are linked through a network of international agreements supporting the International System of Units.
		The base units are consistent with the part of the metric system called the MKS system.
		The SI does not allow these prefixes to be used for binary multiples, such as the use of "kilobit" to mean 1024 bits instead of 1000.
	www.unc.edu /~rowlett/units/sipm.html (1012 words)

	[No title]
		Bigot, L. and Dziembowski, W.A., "The oblique pulsator model revisited", Astronomy and Astrophysics, 391, pp.
		Fernandes, J., Morel, P. and Lebreton, Y., "A calibration of the 85 Peg binary system", Astronomy and Astrophysics, 392, pp.
		Berthomieu, G., Morel, P. Provost, J. and Thévenin, F., "Constraints derived from binary systems calibration: some examples", Observed HR diagrams and stellar evolution: the interplay between observational constraints and theory, eds.
	www.obs-nice.fr /cassiopee/PUBLIS/biblio/stel2002.html (846 words)

	APOD: February 19, 1997 - Mizar Binary Star
		binary star system, each star of the pair follows an elliptical orbital path.
		Mizar is the middle star in the handle of the Big Dipper and at a distance of 88 light years, was the first binary star system
		But, the companions are too close to be directly observed as separate stars, even by the largest telescopes.
	antwrp.gsfc.nasa.gov /apod/ap970219.html (214 words)

	Sirius 2
		A binary, the system is the title member of the Sirius stellar moving group (also know as the Sirius Super Clusteror Ursa Major star stream), which include all five stars of the Great Dipper as well as Gemma and are mostly around 490 million years old and all moving towards the galactic center.
		They form a close binary, Alpha Canis Majoris A and B, that is separated "on average" by only about 20 times the distance from the Earth to the Sun -- 19.8 astronomical units (AUs) of an orbital semi-major axis -- which is about the same as the distance between Uranus and our Sun ("Sol").
		Because ancient astronomers believed that Sirius was red in color as late as 2,000 years ago, some investigators wonder if the system may have a third stellar component, Sirius C, with about five percent of Sol's mass that implies a spectral type M5-9 in a six-year elliptical orbit around Sirius A (Benest and Duvent, 1995).
	www.solstation.com /stars/sirius2.htm (1633 words)

	From Implicit Patterns to Explicit Templates
		An use case is presented, where a Topic Map repository in an integrated information system is updated using a text mining tool, a controlled vocabulary and a workflow of semi-structured documents.
		Let's assume the best case, in which the three Topic Maps use the same controlled vocabulary and/or published subjects and are able to merge the topics representing the role types "system" and "component", and individual topics representing components and systems.
		In such examples, sticking to binary associations would of course avoid the problem, and that best practice could be set on pragmatic principle of keeping associations as simple as possible, which means binary whenever possible.
	www.idealliance.org /papers/xml02/dx_xml02/papers/05-03-06/05-03-06.html (3643 words)

	Science Central : Science - Astronomy
		General astronomy tutorial, education links, web courses, documents at the UCSD Center for Astrophysics and...
		All about infrared astronomy from NASA's infrared astronomy center: Discovery of infrared, what is infrared...
		Solar System (5) Stellar and Astrometric (10) Supernovae and Remnants (7)
	www.sciencecentral.com /category/278 (393 words)

	Binary Star Simulation (Site not responding. Last check: )
		Allows you to set the masses, orbital separation, orbital eccentricity, the inclination angle to our line of sight, and the angle of the nodes of an orbiting star pair.
		You see the privileged (from above the orbit) and the earth view of the system (which depends on the inclination angle).
		The observed velocities of the two stars, and the Doppler shifted spectral lines (as seen against the combined continuum from the two stars) are also shown in the upper rightbox.
	www.global.cornell.edu /courses/astro101/java/binary/binary.htm (379 words)

	B - Astronomy Glossary: Barred galaxy, Big Bang, Binary star system...
		B - Astronomy Glossary: Barred galaxy, Big Bang, Binary star system...
		This page is meant to make it easier for you to understand the content of this web site.
		Binary star system: A system of two stars orbiting around a gravitational centre.
	www.novacelestia.com /glossary/b.html (274 words)

	Astronomy 161: The Solar System
		In this semester of Astronomy we shall concern ourselves primarily with the Solar System.
		As an introduction to that, we shall consider the historical development of our modern picture of the Solar System.
		Sir Isaac Newton and the Unification of Physics & Astronomy
	csep10.phys.utk.edu /astr161/lect (103 words)

	Johnston's Archive--Astronomy and Space (Site not responding. Last check: )
		Outer solar system objects: e vs. a and resonances
		Astronomy Picture of the Day--daily astronomy picture with explanation.
		Cassini-Huygens--current NASA mission en route to Saturn and its moon Titan.
	www.johnstonsarchive.net /astro (560 words)

	World War 1 and 2 - Binary system (astronomy)
		World War 1 and 2 - Binary system (astronomy)
		A binary system is an astronomy term referring to two objects in space, usually stars, which are so close, their gravitational forces, attract one another into a mutual orbit.
		See Binary star for the common case of a binary system composed of two stars.
	www.worldwardiary.com /history/Binary_system_(astronomy) (64 words)

	Publications
		Nagel, T.; Schuh, S.; Kusterer, D.-J.; Stahn, T.; Hügelmeyer, S. D.; Dreizler, S.; Gänsicke, B. T.; Schreiber, M. SDSS J212531.92-010745.9 - the first definite PG 1159 close binary system, Astronomy and Astrophysics, Volume 448, Issue 2, March III 2006, pp.L25-L28
		Kusterer, D.-J.: 2004, Quarkeigenschaften, Topologie und Confinement im Rahmen der Gittereichtheorie / Quarkproperties, Topology und Confinement from Lattice Gauge Theory, diploma thesis
		Hammer, N.J.; Kusterer, D.J.; Nagel, T.; Werner, K.; Dreizler, S.; Rauch, T.: 2005, Modelling C/O/Ne dominated accretion discs in ultra-compact X-ray binaries, ASP Conference Series Volume 330, (eds.
	astro.uni-tuebingen.de /~djkuster/phi/publications.htm (142 words)

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