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Topic: Aleksander Wolszczan

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	Extrasolar planet - Encyclopedia, History, Geography and Biography
		The Polish astronomer Aleksander Wolszczan (with Dale Frail) also claimed to have found the first extrasolar planets in 1993, later confirmed, orbiting the pulsar [[PSR 1257+12]].
		They are believed to be formed from the unusual remnants of the supernova that produced the pulsar, in a second round of planet formation, or the rocky cores that remain of gas giants that survived the supernova, and spiralled in to their current orbits.
		Wolszczan had discovered the millisecond pulsar in question in 1990 at the Arecibo radio observatory.
	www.arikah.net /encyclopedia/Extrasolar_planet (4208 words)

	Aleksander Wolszczan (Site not responding. Last check: 2007-11-03)
		Aleksander Wolszczan (born 1946) is a Polish astronomer.
		Wolszczan published his findings in 1992 and 1994.
		In 1996, Wolszczan was awarded the Beatrice M. Tinsley Prize by the American Astronomical Society.
	www.gogoglo.com /wiki/en/wikipedia/a/al/aleksander_wolszczan.html (198 words)

	ww.torun.z.pl - Aleksander Wolszczan
		Wolszczan started to interest in radioastronomy in 1973, when he was in Bonn, Germany on a scientific visit, because there's situated the biggest radiotelescope in Europe.
		July 1999 brought Wolszczan an acknowledgement of "Nature" for one of the sixteen fundamental works, published by the magazine.
		Wolszczan was nominated from 26 pretenders for the Inhabitant of Torun of the XX century.
	torun.dmkhosting.com /html40en/history/wolszczan.php (207 words)

	[No title]
		The prize recognizes an outstanding research contribution that is of an exceptionally creative or innovative character and that has played a seminal role in furthering the understanding of the universe.
		According to the society, Wolszczan was selected for his "creative and innovative analysis of binary and relativistic pulsars culminating in the discovery of a system of planets outside our solar system." He also received the Casimir Funk Natural Sciences Award from the Polish Institute of Arts and Sciences in America.
		Professor Wolszczan is a member of many scientific societies among others American Astronomical Society, American Association for the Advancement of Science, International Union of Radio Science, International Astronomical Union.
	www.angelfire.com /scifi2/rsolecki/aleksander_wolszczan.html (501 words)

	Warsaw Voice - The Copernican Revolution Continues
		Professor Aleksander Wolszczan is a distinguished world specialist in the domain of research into pulsars—or neutron stars—and “pulsar timing".
		Wolszczan has measured with great accuracy changes in the rhythm of subsequent radiation impulses—pulsars emit a beam of radiation which reaches the Earth once during each rotation of the star, and consequently we record series of radio impulses.
		With the use of these measurements, Wolszczan has demonstrated that there are three planets orbiting the PSR 1257 pulsar.
	www.warsawvoice.pl /view/164 (274 words)

	Catalog Page for PIA08042 (Site not responding. Last check: 2007-11-03)
		Wolszczan used the Arecibo radio telescope in Puerto Rico to find three planets - the first of any kind ever found outside our solar system - circling a pulsar called PSR B1257+12.
		The planets spotted by Wolszczan are still the only ones around a dead star.
		They also might be part of a second generation of planets, the first having been destroyed when their star blew up.
	photojournal.jpl.nasa.gov /catalog/PIA08042 (244 words)

	SFL ORG. News Center NASA's Spitzer Finds Hints of Planet Birth Around Dead Star
		The finding also represents the missing piece in a puzzle that arose in 1992, when Dr. Aleksander Wolszczan of Pennsylvania State University found three planets circling a pulsar called PSR B1257+12.
		This might be the beginning of a second generation of planets," Wolszczan said.
		The ground-based data is from the Keck I telescope atop Mauna Kea, Hawaii.
	www.sflorg.com /spacenews/sn040506_01.html (1286 words)

	Washington NASA Space Grant Consortium
		Noted Polish radio-astronomer and astrophysicist, Aleksander Wolszczan will be speaking Friday, March 7, at the University of Washington.
		Wolszczan is widely recognized for his discovery of the first planets outside the solar system.
		In his lecture, Wolszczan will discuss the development and importance of the new, exciting field of astronomy of the extrasolar planets, from its surprising beginnings marked with the discovery of pulsar planets to the most recent, spectacular detections of giant planets around Sun-like stars.
	www.waspacegrant.org /e-news2B03.html (625 words)

	Science: Trio of planets found orbiting nearby pulsar - 14 December 1991 - New Scientist
		Now Aleksander Wolszczan of Arecibo Radio Observatory in Puerto Rico and Dale Frail of the National Radio Astronomy Observatory in New Mexico report the discovery of at least two planets around the pulsar PSR 1257+12.
		Wolszczan discovered the pulsar in the constellation Virgo in 1990.
		Since then, Wolszczan and Frail have been monitoring the pulsar, which is 1600 light years away.
	www.newscientist.com /article/mg13217993.100.html (288 words)

	[No title]
		At Pennsylvania State University, Dr. Aleksander Wolszczan has detected three - in orbit around a star called PSR 1257+12.
		From perturberations in the regular pulses emmitted by this "astronomical lighthouse", Dr. Wolszczan detected two planets slightly bigger han Earth and one much smaller, about the size of Mercury.
		Researchers speculate that PSR 1257+12 may have had a companion star from which the pulsar slowly drew off gas and dust until it's partner was destroyed.
	www.textfiles.com /ufo/nasaseek.txt (948 words)

	Science: Planets are common around solitary pulsars - 22 February 1992 - New Scientist
		Two astronomers in the US, Aleksander Wolszczan and Dale Frail, discovered the planets last year (New Scientist, Science, 14 December).
		They were using the giant radio telescope at Arecibo in Puerto Rico to observe a pulsar known as PSR 1257+12, which lies 1600 light years away in the constellation of Virgo.
		Wolszczan and Frail found that this period changes gradually, indicating the pulsar is swinging around the centre of mass of a system containing two small bodies.
	www.newscientist.com /article/mg13318092.900.html (279 words)

	Brief Project Description
		The long wait for the first planet outside the solar system ended in 1991 with Dr.
		Aleksander Wolszczan's discovery of 3 roughly earth-sized planets orbiting the pulsar PSR B1257+12 (confirmed in 1994).
		Since then the list of confirmed extrasolar planets has grown to nearly 30, with most of these orbiting stars not unlike our Sun.
	www.nahks.com /astro/project.html (2901 words)

	Extrasolar planet - Article from FactBug.org - the fast Wikipedia mirror site
		The case for HD 114762 has yet to be disproven.
		The Polish astronomer Aleksander Wolszczan also claimed to have found the first extrasolar planets in 1993, later confirmed, orbiting the pulsar PSR 1257+12.
		See the list of stars with confirmed extrasolar planets for a list of confirmed observations.
	www.factbug.org /cgi-bin/a.cgi?a=9763 (2876 words)

	Learn more about Aleksander Wolszczan in the online encyclopedia. (Site not responding. Last check: 2007-11-03)
		Learn more about Aleksander Wolszczan in the online encyclopedia.
		You are here: Online Encyclopedia > Aleksander Wolszczan
		Hint: Play with putting spaces before and after your words to see the different results you get.
	www.onlineencyclopedia.org /a/al/aleksander_wolszczan.html (256 words)

	USATODAY.com - How dead stars make planets (Site not responding. Last check: 2007-11-03)
		"This discovery demonstrates that the planet-creation process is a very robust and a very universal one," said Aleksander Wolszczan, an astrophysicist from Penn State University who was not involved in the finding.
		Forming gas giants like Jupiter is more difficult around neutron stars because their debris disk contains less of the light elements, such as hydrogen and nitrogen, than is found around the disk of normal stars.
		Another reason for favoring rocky planets is that there just isn't enough material in a neutron stars debris disk to form anything else.
	www.usatoday.com /tech/science/space/2006-04-05-planet-birth_x.htm (848 words)

	Stargazer MMIII No. 2
		Professor Wolszczan's specialty is the study of pulsars - fantastically dense, rapidly spinning neutron stars with a diameter of 20 km or less, emitting extremely regular pulses of radio waves into space.
		This is the method that Aleksander Wolszczan applied to make one of the most sensational astronomical discoveries of the last decades.
		Timing the radio signals coming from a distant pulsar in the constellation Virgo, he determined the presence of three planets orbiting the star, two of them similar in mass to Earth, and the third about the mass of the moon.
	members.tripod.com /everett_astronomy/stargazer_mmiii_02.htm (7149 words)

	Dead star, new planets?
		The discovery, which is published on Thursday in the weekly British journal Nature magazine, fills in the missing piece of a puzzle that is more than 13 years old.
		In 1992, Pennsylvania University astronomer Aleksander Wolszczan discovered three planets, two of them Earth-sized, orbiting a pulsar named PSR B1257+12.
		They were the first planets detected outside our Solar System, but the nagging question was why they were there and had not been obliterated by the star's explosion.
	www.spacedaily.com /2006/060406103218.2a6r81hj.html (463 words)

	Centauri Dreams » Blog Archive » Planetary Formation Around a Pulsar
		After all, any planets originally orbiting a star that goes supernova will doubtless be incinerated, so pulsar planets are not survivors but entirely new worlds.
		Image: This artist’s concept depicts the pulsar planet system discovered by Aleksander Wolszczan in 1992.
		The planets spotted by Wolszczan are still the only ones known to orbit a dead star.
	www.centauri-dreams.org /?p=611 (606 words)

	Ghost pulsars in the sky - turbulent electrons in interstellar matter cause multiple refractions of pulsars Science ...
		Turbulent electrons in interstellar space can do the same for radio waves from celestial sources.
		Aleksander Wolszczan of the National Astronomy and Ionosphere Center's Arecibo Observatory in Puerto, Rico, and James M. Cordes of Cornell University in Ithaca, N.Y., have done year-long observations of such scintillations of pulsars.
		They are now convinced that such multiple refractions occur on a time scale of tens of seconds, and that "the instanteneous image of some pulsars is also sometimes multiple."
	www.findarticles.com /p/articles/mi_m1200/is_v129/ai_4107842 (274 words)

	SPACE.com -- How Dead Stars Make Planets
		Artist conception showing the triple planet system discovered around pulsar PSR B1257+12 by Aleksander Wolszczan in 1992.
		In 1992, Wolszczan's team discovered a trio of rocky worlds around a fast-spinning pulsar.
		The finding was the first confirmed detection of planets beyond our solar system.
	www.space.com /scienceastronomy/060405_supernova_disk.html (930 words)

	Imagine the Universe! Ten Year Anniversary
		A sinusoidal variation in the arrival time of the pulse indicates the pulsar's orbital motion around an unseen body.
		In 1992, Aleksander Wolszczan and Dale Frail announced the discover of a planetary system around the pulsar PSR 1257+12.
		Subsequent observations confirmed and refined the parameters of the system: 3 planets, with masses ranging from 0.015 of the mass of the Earth to 4.3 times the mass of the Earth.
	imagine.gsfc.nasa.gov /docs/features/exhibit/tenyear/exoplanets.html (1607 words)

	"Another planet is found that circles its own sun"
		The confirmation is enough to convince other astronomers, including Angel, who long has hunted for planets himself.
		A few years ago, astronomer Aleksander Wolszczan of Pennsylvania State University made another major step by detecting the presence of planets around an object called a pulsar - a burned-out, dead star that sends out regular pulses of radio waves.
		Such a planet would harbor an even more hostile environment than this new one.
	sln.fi.edu /inquirer/planet.html (541 words)

	Astronomy and Astrophysics (ASTRO)
		Richard A. Wade, Ph.D. (Cal Tech) Associate Professor of Astronomy and Astrophysics
		Aleksander Wolszczan, Ph.D. (Copernicus U, Poland) Evan Pugh Professor of Astronomy and Astrophysics
		Graduate instruction and research opportunities are available in theoretical, experimental, and observational astronomy and astrophysics.
	www.psu.edu /bulletins/whitebook/programs/astro.htm (718 words)

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