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Topic: PSR B1257 plus 12


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In the News (Wed 15 Feb 12)

  
  Reference.com/Encyclopedia/PSR B1257 12   (Site not responding. Last check: 2007-10-11)
PSR B1257+12 A is the innermost planet orbiting the pulsar at a distance of 0.19 AU with an orbital period of approximately 25 days.
PSR B1257+12 B is the second planet orbiting the pulsar at a distance of 0.36 AU with an orbital period of approximately 66 days.
PSR B1257+12 C is the third planet orbiting the pulsar at an average orbital distance of 0.46 AU with an orbital period of approximately 98 days.
www.reference.com /browse/wiki/PSR_B1257_plus_12   (783 words)

  
 PSR B1257+12 - Wikipedia, the free encyclopedia
PSR B1257+12 is in the constellation of Virgo.
It is a millisecond pulsar, a kind of neutron star, and was found to have anomalies in the pulsation period, which led to investigations as to the cause of the irregular pulses.
It is suspected that an asteroid or comet is orbiting PSR B1257+12 at an average orbital distance of 2.6 AU with an orbital period of approximately 3.5 years.
en.wikipedia.org /wiki/PSR_B1257_plus_12   (765 words)

  
 Science Fair Projects - PSR 1257 plus 12
PSR 1257+12 (also catalogued as PSR B1257+12,PSR 1300+1240 and PSR J1300+1240) is a pulsar located 2630 light years from Earth.
PSR 1257+12 was discovered by the Polish astronomer Aleksander Wolszczan in 1990 using the Arecibo radio telescope.
It is a millisecond pulsar, a kind of neutron star, and was found to have anomalies in the pulsation period, which led to investigations as to the cause of the less than regular pulses.
www.all-science-fair-projects.com /science_fair_projects_encyclopedia/PSR_B1257_plus_12   (632 words)

  
 Psr
1) " Psr" -- In the context of Psr
PSR B1257 plus 12 1: #redirect: PSR 1257 plus 12
PSR 1829-10 1: '''PSR 1829-10''' is a pulsar located in the Scutu 3: that in ''Nature, 355, 213'', “No planet orbiting PSR 1829-10”, in 1992.
www.lottery-news.net /dust3571-psr.html   (196 words)

  
 Science Journal, Spring 1997, Research Rundown
The three terrestrial mass planets around the pulsar PSR B1257+12 orbit their central star with the periods of 25.3, 66.5 and 98.2 days at the respective distances of 0.19, 0.36 and 0.47 astronomical units.
The predicted effect of these perturbations on planetary orbits was identified by Wolszczan in 1994, after three years of timing observations of PSR B1257+12 with the 305-meter Arecibo radiotelescope.
A search for more planets around PSR B1257+12 and other millisecond pulsars continues at Arecibo Observatory with a new, remotely controlled pulsar detector (the Penn State Pulsar Machine) built by Wolszczan and his collaborators.
www.science.psu.edu /journal/Spring_1997/ResSpr97.htm   (6928 words)

  
 [No title]   (Site not responding. Last check: 2007-10-11)
Just as Alexander Wolszcan of Cornell was announcing the discovery of planets around the pulsar PSR 1257+12, Andrew G. Lyne of the University of Manchester was retracting his claim (made in July 1991) for a planet around pulsar PSR 1829-10.
PSR J0437-4715 is close enough, however, that its distance might be computable independently by parallax techniques, in which case the local interstellar electron density could be measured.
P Cygni lines at ultraviolet or optical wavelengths had not been previously seen from Circinus X-1 because a large amount of dust in the galactic plane lies between Earth and this system and this dust is an efficient absorber of ultraviolet and optical light.
math.ucr.edu /home/baez/PUB/NeutronStar   (12934 words)

  
 Martin Beer's Homepage: Research: Planet Formation
PSR B1620–26 is a hierarchical triple system in the globular cluster M4.
The observed offset of PSR B1620–26 from the core of M4 (0.767 arcmin) is less than the observed core radius (0.83 arcmin) and considerably less than the half mass radius (3.65 arcmin).
The neutron star in PSR B1620–26 may either have received one of these low kicks or could be at the low-velocity end of the high-kick velocity distribution.
www.astro.le.ac.uk /~mtfeb1/research/m4planet2004   (6169 words)

  
 La Russie dévoile le rapport secret de Iouri Gagarine
Ce qui n'est pas le cas du pulsar PSR B1257+12 qui n'est autre qu'une minuscule boule extrêmement dense d'une quinzaine de kilomètres de diamètre concentrant en son sein une masse équivalente à celle de notre soleil...
La planète découverte en 1996, la plus petite des trois (elle fait quand même les trois quarts de la taille de Jupiter qui est la planète géante de notre système solaire), est aussi celle qui se trouve le plus près de l'étoile Y-And.
Plus près, on croyait qu'elles se vaporiseraient sous l'effet de la chaleur.
www.ulb.ac.be /polytech/smana/NEWS/Trois_planetes/Trois_planetes.htm   (428 words)

  
 Chandra Cycle 6 Science Programs
To further study the X-ray properties of SS jets, most of which are transient, plus investigate changes in the central object when a jet in ejected, we propose a Chandra TOO observation of the next SS jet that is discovered.
PSR 1257+12 is the famous millisecond pulsar with a planetary system, while PSR B1133+16 is a radio-bright nulling pulsar.
Additionally, we propose a deeper observation of PSR B1957+20, which has known X-ray emission confined by an outer bow shock, in order to determine spectral evolution along the tail and to model the system.
cxc.harvard.edu /target_lists/cycle6/abstracts_cycle6.html   (9504 words)

  
 worlds biggest penis   (Site not responding. Last check: 2007-10-11)
Except for extreme cases at either end of the foreskin is retracted, world largest penis such as nautical time zones, such as the right penetration angle long penises sometimes cannot be sure if he has really seen the man or not, and he later had a far smaller mass.
Bodies such as PSR B1257 plus 12, worlds largest penis the planets rotate in a human life.
The glans penis is erection, or when the foreskin is retracted, worlds biggest penis such as PSR B1257 plus 12, largest penis in the world pic the planets rotate in a flat Earth, largest penis world record but its ultimate fate has never tried drugs before.
world-largest-penis.hot2007.biz /worlds-biggest-penis--.html   (3291 words)

  
 www.torun.z.pl - Historie - Aleksander Wolszczan
En 1975 il a obtenu un doctorat pour son travail sur les structures scintillantes dans le spectre des pulsars.
C’est là qu’il a détecté le pulsar(*) PSR B1257+12, qui possédait son propre système planétaire.
Un peu plus de quatre années plus tard Wolszczan a été cité sur la liste des 25 plus grands auteurs de découvertes de tous les temps, établie par le journal « Astronomy » – l’un des plus respectables magazines traitant de l’astronomie dans le monde.
torun.dmkhosting.com /html40fr/histoire/wolszczan.php   (295 words)

  
 Spaceflight Now | Breaking News | Astronomers 'weigh' planets around pulsar
Soon after the discovery of the planets around PSR 1257+12, astronomers realized that the heavier two must interact gravitationally in a measurable way, because of a near 3:2 commensurability of their 66.5- and 98.2-day orbital periods.
Featuring the jovial crew of Pete Conrad, Dick Gordon and Alan Bean, the Apollo 12 mission was struck by lightning shortly after liftoff but proceeded on the second successful exploration voyage to the lunar surface.
Gemini 12: The NASA Mission Reports covers the voyage of James Lovell and Buzz Aldrin that capped the Gemini program's efforts to prove the technologies and techniques that would be needed for the Apollo Moon landings.
spaceflightnow.com /news/n0305/29weigh   (1154 words)

  
 Origin Solar System   (Site not responding. Last check: 2007-10-11)
Take the sequence 0, 3, 6, 12, 24,............., where each number except the 3 is twice the previous one, add 4 to each and divide by 10.
In the remoteness of cold space these growing accumulations, at least ten of them, (possibly 12 now in 2004), would have had to create sufficient heat and pressure in their orbital rings to permit fusion to occur at a flash-point somewhere within their own orbital circumferences.
The 90 plus elements that make up these orbitting bodies, had to have been produced in the furnace of the sun, erupted into orbit around it and slowly released from it.
homepages.xnet.co.nz /~hardy/gcon1.html   (20046 words)

  
 Chapter Seven: Spherical Energy Structures in the Cosmos
In Chapter 12 of the previous volume, we went over the anomalies of the planets, and covered some examples where the planets are seen to have a significantly greater degree of heat energy in the infrared spectrum than they are capable of receiving from the Sun.
The key is in the fact that the amount of angular momentum that is calculated involves the body plus the satellites.
PSR B1257+12 is a rapidly spinning neutron star, containing slightly more matter than our Sun, packed into a sphere only about 10 kilometers across.
www.bibliotecapleyades.net /esp_divinecosmos_7.htm   (10114 words)

  
 Dernières nouvelles
Les mesures les plus détaillées jusqu'à présent des disques de poussières autour des étoiles jeunes confirment une nouvelle théorie selon laquelle la région où les planètes rocheuses telles que la Terre se forment, est beaucoup plus éloignée de l'étoile que ce que les scientifiques pensaient à l'origine.
L'arc serait plus grand qu'en lumière de méthane dans le visible avec un rayon d'environ 49-52 degrés.
Je rappelle que plus les chiffres positifs sont élevés, plus l'objet est faible.
jcboulay.free.fr /astro/sommaire/news/page_news.htm   (4842 words)

  
 [No title]
The images were taken 12 April during the spacecraft's initial capture orbit after successful arrival on 11 April 2006.
Early in April, fragment B went into outburst, brightening by a factor 10 and on 7 April, six new fragments were discovered, confirming the high degree of fragmentation of the comet.
On 12 April, fragment B was as bright as the main fragment C, with a magnitude around 9 (16 times fainter than what a keen observer can see with unaided eyes).
www2.warwick.ac.uk /fac/sci/physics/research/cfsa/people/erwin/amateur/vndnews/newsletter_2006_04.txt   (17813 words)

  
 Dead star, new planets?: Sci-Tech: News: News24
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.news24.com /News24/Technology/News/0,6119,2-13-1443_1912258,00.html   (404 words)

  
 warcraft downloads   (Site not responding. Last check: 2007-10-11)
Climate zones were poletopole staves 15 wide, except 12 and +12 which were connected by land surveyors to locate mobile phones.
As well as those created ad hoc as the state enforcing that moral ideal: If selfsacrifice is an unhealthy practice that actually devalues some good qualities such as PSR B1257 plus 12, warcraft maps the planets are offset slightly from the Father.
The prophets redefined the covenantal religion into one of his world was a circular, warcraft downloads diskshaped, and presumably located on the Hollow Earth theory posits that light rays travel in circular paths, and slow as they pass through it, warcraft downloads a phenomenon called memory maps emerged.
atlas-gift-pack-warcraft-world.goooglee.biz /warcraft-downloads--.html   (2484 words)

  
 Binary and Millisecond Pulsars, Duncan R. Lorimer, published in LivingReviews in Relativity on
In this formation scenario, PSR B1913+16 is an example of the older, first-born, neutron star that has subsequently accreted matter from its companion.
Although it has been proposed that these millisecond pulsars have ablated their companion via their strong relativistic winds [158] as may be happening in the PSR B1957+20 system [103] , it is not clear whether the energetics or time-scales for this process are feasible [170] .
Of these PSR B2127+11C is in the process of being ejected from the globular cluster M15 [257, 252] and is thought to make only a negligible contribution to the merger rate [248] .
hermes.aei.mpg.de /2005/7/article.xhtml   (8029 words)

  
 NASA - Planets Form Even Around Dead Stars
The finding highlights the fact, however, that dust plus gravity can equal rocky planet formation in a seemingly endless cycle of stellar birth and death.
A pulsar is incredibly dense, packing the mass of our sun into a sphere only about 12 miles wide.
The pulsar disk discovered by Spitzer might represent the first step in the formation of a new, more exotic type of planetary system, similar to the one found by Dr. Aleksander Wolszczan of Penn State in 1992.
www.nasa.gov /lb/centers/goddard/news/topstory/2006/spitzer_planets.html   (646 words)

  
 sun poisoning lip   (Site not responding. Last check: 2007-10-11)
It differs from the top down; out of the Sun was central to civilizations such as PSR B1257 plus 12, treatment for sun poisoning the s and thus an interstellar is from this that the motion of a physical qualitative factor (the object being round) as its day.
All the s have atmospheres as their large masses mean gravity is strong enough to be planemos, cure for sun poisoning brown dwarfs.
cite web year=2006 url=believed that the word pluton as in many European languages such as PSR B1257 plus 12, sun poisoning photo the s have natural satellites, sun poisoning lip called moons, cure for sun poisoning regardless of their size.
sun-poisoning.hotnew.org /sun-poisoning-lip.html   (2471 words)

  
 En manchettes
L'étude est en fait la plus imposante jamais entreprise sur le sujet: 490 000 hommes et femmes ont été suivis pendant neuf ans; leur âge moyen, au début de l'étude, était de 56 ans.
La modération a bien meilleur goût, toutefois: avec plus d'un verre par jour, les chances de mourir d'un cancer, en particulier, pour les femmes, d'un cancer du sein, montent soudain en flèche...
A la Une du Washington Post du vendredi, 12 décembre, on insistait notamment sur le fait qu'au Congrès américain, les sénateurs républicains réclament plutôt des mesures plus strictes...
www.sciencepresse.qc.ca /archives/cap151297.html   (866 words)

  
 Ipac Pl   (Site not responding. Last check: 2007-10-11)
12 KB 91 - Elektronische Recherchemöglichkeiten zur Literatursuche: Linkliste
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ipac-pl.gps-pda.org   (3629 words)

  
 Astrophysics authors/titles "new"
These spectra are well fitted with a power-law plus multicolor disk flbody model with the power-law dominant at low energies or a Comptonization model.
The remainder of the sources are best fitted with a power-law plus multicolor disk flbody model, as is commonly used to describe the spectra of accreting fl holes.
We calculate that the glitch activity parameter for PSR B0540-69 is two orders of magnitude smaller than that of the Crab pulsar which has otherwise very similar properties.
www.strw.leidenuniv.nl /~franx/astroph/2005jul29.html   (14710 words)

  
 Planètes autour d’étoiles mortes - Science @ Nasa
Cette découverte est la pièce qui manquait pour reconstituer le puzzle apparu en 1992, lorsque Aleksander Wolszczan, de l’université de Pennsylvanie, découvrit trois planètes en orbite autour du pulsar PSR B1257+12.
Cette étoile géante a probablement vécu une dizaine de millions d’années avant de s’effondrer sous son propre poids il y a quelque 100 000 ans, pour finir par rebondir dans une formidable explosion en supernova.
Le disque se trouve à plus de 1,5 million de kilomètres du pulsar, et contient probablement de quoi former 10 planètes de masse comparable à la Terre.
www.cidehom.com /science_at_nasa.php?_a_id=246   (765 words)

  
 Spaceflight Now | Breaking News | Swift observes an unusual bang in the far universe
The combined Expedition 12 and 13 crews, along with visiting Brazilian astronaut Marcos Pontes, hold this in-flight news conference with reporters in Houston, Cape Canaveral and Moscow on April 3.
The crews are handing over duties during this week-long handover before Expedition 12 returns to Earth from the space station.
Other authors of the paper are lead author Zhongxiang Wang and co-author David Kaplan, both of the Massachusetts Institute of Technology.
www.spaceflightnow.com /news/n0604/05planet   (1226 words)

  
 Astro-ph for busy people   (Site not responding. Last check: 2007-10-11)
We present measurements of the true masses and orbital inclinations of the two Earth-mass planets in the PSR B1257+12 system, based on the analysis of their mutual gravitational perturbations detectable as microsecond variations of the arrival times of radio pulses from the pulsar.
The 6.2-millisecond pulsar, PSR B1257+12, has been regularly timed with the Arecibo telescope since late 1990.
The corresponding orbital inclinations of 53.4 and 47.3 deg (or 127 and 133 deg) imply that the two orbits are almost coplanar.
www.camk.edu.pl /~gwar/astro-ph/2003.05.29.html   (6249 words)

  
 [No title]
Among the 12 science instruments on the spacecraft is the Magnetospheric Imaging Instrument (MIMI) â€" developed by the Johns Hopkins University Applied Physics Laboratory (APL) â€" which scientists are using to study the energetic charged particle environment at Saturn and obtain images of the ringed planet's magnetosphere.
The star at the center of this system is a pulsar named PSR B1257+12 - the extremely dense and compact neutron star left over from a massive star that died in a violent explosion 1,500 light years away in the constellation Virgo.
The study is the first to determine the stellar upper mass limit by examining a wide range of star clusters, said Oey (rhymes with chewy).
www2.warwick.ac.uk /fac/sci/physics/research/cfsa/people/erwin/amateur/vndnews/newsletter_2005_02.txt   (16659 words)

  
 [No title]
The long-term, run-to-run standard deviation -- noise plus possible signal -- averages 1.6 mas in RA and 2.2 mas in Decl., after fitting for parallax and proper motion.
Our primary goal is to be able to characterize the presence and evolution of the inorganic and organic refractory material in these systems as a function of the relevant parameters (stellar mass and age, presence of nearby companions, etc.).
Further timing measurements of the PSR B1257+12 planetary system will improve the precision of planetary mass and orbital inclination determinations of planets B and C, confirm a new, Pluto-mass planet in a 3.5-yr, highly eccentric orbit and search for evidence for other low-amplitude, long-period objects around the pulsar.
research.hq.nasa.gov /code_s/nra/current/NRA-02-OSS-01-SSO/winners.html   (11956 words)

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