All stars derive their energy through the thermonuclear fusion of light elements in to heavy elements. High temperatures are required so that the mutual electrostatic repulsion of the protons in each fusing atomic nucleus is overcome. ... Elements with more protons in their nuclei require higher temperatures. ... This sequence is now shown in the animation below. ... First Step of the Proton-Proton Chain Narration . Second Step of the Proton-Proton Chain Narration . ...

... Ever wonder how solar-mass stars form?. ... In order for material to accrete onto a protostar it has to lose angular momentum. The angular momentum of a large natal cloud leads to the formation of a circumstellar disk and inner accretion disk as the cloud collapses. ... Winds generated in the inner disk or close to the stellar surface (we don't know which) expel material along the disk rotation axis. ... This provides the highest resolution observational data on nearby young stars. ...

... Wednesday 5 November 2008 . ... Free astronomy workshop in Bunclody Library, Carrigduff Co Wexford: The Life and Death of Stars, by Colin Melody . Thursday evening, 13th November 2008, at 8pm . ... International Year of Astronomy, Ireland National Node . ...

... The Telescope and Dome . ... The Lynxx . ... Data Acquisition . ... Data Acquisition with the Lynxx . ... ST-6 Data Collection . Data Storage . Data Formats . Data Storage Media . Data Processing . ... The Lynxx Tools . ... A Night At The Telescope . ... Week 1 . ... Lynxx Time Sheet . ... 14" Telescope Shut Down Check Sheet . ...

GJ 849 . HIP 109388 . ... Расстояние от Солнца . ... 0.52+0.07 . ... открыта в 2006 году . ... Расстояние в перицентре - 2.29 а.е. Расстояние в апоцентре - 2.49 а.е. GJ 849 c . Расстояние в перицентре - 4.4 а.е. Расстояние в апоцентре - 5.24 а.е. Радиус эффективной земной орбиты (показана зеленым цветом) - 0.2 а.е. Новости о системе: . ... 2 HD 145934 b и GJ 849 c: прохладный гигант у красного гиганта и очень холодный гигант у красного карлика (+ обновлены данные еще нескольких планет) ...

... Astrophysics Group . Research . Star Formation . ... Cosmic Microwave Background (CMB) . ... Galaxy Formation and Evolution . ... In particular, we study the supersonic jets ejected during the star formation process, and the accretion disks surrounding the protostars which allow the stars to grow in mass and in which planets are believed to form. ... Members of the group are also investigating the nature of star formation on galactic scales ? see the pages of the Galaxy Evolution group. ...

... Seidewand created the event FREE WEEKLY TELESCOPE VIEWING AT STRASENBURGH PLANETARIUM: 4/2 cancelled for clouds, snow, . ... Free! ... Call Jim at 703-9876 for more info. 1 week ago . ... Seidewand created the event FREE TELESCOPE VIEWING AT STRASENBURGH PLANETARIUM . ... Seidewand created the event FREE TELESCOPE VIEWING AT STRASENBURGH PLANETARIUM: 3/26 outlook is hopeful . ... Seidewand created the event FREE TELESCOPE VIEWING AT STRASENBURGH PLANETARIUM: 3/19 outlook is excellent . ...

... Search . ... ITHACA, N.Y. -- Once considered just your average single asteroid, 2001 SN263 has now been revealed as the first near-Earth triple asteroid ever found. read more .. Neutron stars and black holes aren't all they've been thought to be. In fact, neutron stars can be considerably more massive than previously believed, and it is more difficult to form black holes, according to new research developed by using the Arecibo Observatory in Arecibo, Puerto Rico. read more .. ...

... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . ... Survey Telescopes . ... Star Clusters . ... Stars@ESO . ... This video zoom sequence starts with a wide-field view of the bright constellation of Leo (The Lion) and slowly closes in on what looks like an unremarkable faint star. This ancient star is called SDSS J102915+172927 and has been found to have the lowest amount of elements heavier than helium of all stars yet studied. ... SDSS J102915+172927 . ...

... NASA's Hubble Space Telescope offers a stunning unprecedented close-up view of a turbulent firestorm of starbirth along a nearly edge-on dust disk girdling Centaurus A, the nearest active galaxy to Earth. A ground-based telescopic view (upper left insert) shows that the dust lane girdles the entire elliptical galaxy. This lane has long been considered the dust remnant of a smaller spiral galaxy that merged with the large elliptical galaxy. ...

News of events at Armagh Planetarium . ... Events . ... Booking . ... Archive | ... by AP_admin on March 3, 2016 in Exhibitions , Family Events . Coming to galaxy near you is The Stars Awaken, a wonderful exhibition of€а full-size fan-built props and creations inspired by the amazing Star Wars saga! ... Celebrate Stars Wars at the Stars Awaken Exhibition Posted on March 3, 2016 . ... Click here to receive news of special events at Armagh Planetarium . 2016 Armagh Planetarium Events. ...

... Development of Ideas of Structure and Evolution of Stars. Integral Features of Stars, Which Determine Their Structure, Direction and Rate of Evolutuion. ... Connection between Potential and Thermal Energy of Star. ... Structure of a Main Sequence Star. Features of Massive Stars Evolution on the Main Sequence. Internal Structure of the Sun. ... White Dwarfs, Their Features. ... Evolution from the Main Sequence of Massive Stars. ... Evolution of Small Mass Stars till White Dwarfs Sequence. ...

... Bad Astronomy . ... Bad Astronomy: The North Star, Polaris, is a very bright star. Good Astronomy: Polaris is a middling-bright star, easily missed. ... He said it was close to Polaris, the North Star, but he also said it was in the East. ... It's natural, I suppose, to think that such an important star should be bright, but really, that's a conceit, like thinking that the Earth is at the center of the Universe. If more people knew just why Polaris is the North Star, this Bad Idea would stop. ...

... Tonight's Sky . ... The Magazine . ... Observing . ... Behemoth black hole found in an unlikely place . ... Astronomy for Kids . ... Feeding frenzy of a supermassive black hole . ... Without much material, the black hole remains fairly quiet, at least when compared with the supermassive black holes in some other galaxies. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

Next: Abstract . Mikhail E. Prokhorov and Konstantin A. Postnov . ... Physics of Neutron Stars'' . ... Abstract . ... Initial conditions . Space and velocity distributions . Space position . Initial velocity . ... Mike E. Prokhorov . ...

Setting the Galaxy's Age : Discovery News 12-07-08 11:22 AM skip to main content earth space tech and gadgets animals history adventure human brain games video rss feeds discovery .com Discovery News Space News Setting the Galaxy's Age Setting the Galaxy's Age A scientist cracks the code using white dwarf stars to determine when the Milky Way got its halo . http:// ... 79 THE GIST New technique shows Milky Way's halo is 11.4 billion years old. ...

... title='Освещение для аквариума Sea Star HX-28T White 1101287' border='0' align='left' width='120' style='margin-right: 20px;' hspace='7' vspace='5'/> . title=' Качели Tako HBU Animals - TakoHBU Animals' border='0' align='left' width='120' style='margin-right: 20px;' hspace='7' vspace='5'/> Максимально безопасные напольные качели Tako HBU Animals не оставят вашего ребенка равнодушным. ... Особенности Tako HBU Animals: Предназначены для детей от 1 года до 4 лет весом до 25 кг. ...

The Telescope:Pointing Data script takes set of pointing error measurements of pointing reference stars across the sky. ... To retry measuring the star, fix the problem (e.g. by adjusting focus, exposure time or offset) and press Continue . ... For each point in the az/alt grid the script will find and slew to a nearby pointing reference star, measure the star, write the pointing error to a data file whose path is displayed, and correct the pointing error. ...

Next: ASCII source files Up: Getting started Previous: Getting started . The essential data needed for program stars are names, positions, and the equinox to which the positions are referred. ... The command MAKE/STARTABLE helps you create a table of program stars. Some telescopes record the position toward which the control system thinks the telescope is pointing as part of the data stream, so it is tempting to extract these data to make a positional catalog for the program stars. ...

... Editor's choices for the most educational Astronomy Pictures of the Day about binary stars: . APOD: 1999 December 19 – Accretion Disk Binary System . Explanation: Our Sun is unusual in that it is alone - most stars occur in multiple or binary systems . In a binary system, the higher mass star will evolve faster and will eventually become a compact object - either a white dwarf star, a neutron star , or black hole . ... APOD: 2003 November 10 – An Intermediate Polar Binary System . ...