... Particle Sizes in Saturn's Rings . ... Explanation: What size particles compose Saturn's rings? ... The experiment was sensitive to ring particle sizes because ring particles much larger than a broadcast radio wavelength will reflect those radio waves away. ... The white center of Saturn's B-ring indicates that the density of ring particles was too high to make a good determination. Other radio observations indicate that some ring particles can be as large as several meters across. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. May 5, 1998 . Aurora at Midnight . Credit Copyright: J. Curtis ( U. Alaska Fairbanks ) . Explanation: What's happening behind those trees? Aurora . This picture was taken at midnight near Fairbanks , Alaska , and captures familiar trees, common clouds, and a glowing sky markedly different than a sunset . ... About APOD > . ...

Astronomy Picture of the Day . Aurora at Midnight . ... 5.05.1998 . ... Credit: J. Curtis ( U. Alaska Fairbanks ) Explanation: What's happening behind those trees? ... This picture was taken at midnight near Fairbanks , Alaska , and captures familiar trees, common clouds, and a glowing sky markedly different than a sunset . ... NASA Web Site Statements, Warnings, and Disclaimers . ... U. Based on Astronomy Picture Of the Day . Publications with keywords: aurora . ... Aurora Over Alaska . ...

... Главная . ... Новости . ... Проекты . Любителям астрономии . Проект ISON . ... Подробнее . ... Категория: Новости проекта ISON . ... Метки: Космический мусор ,љ Астероиды ,љ Гамма-всплески ,љ Любителям астрономии ,љ Кометы љ . ... Метки: Космический мусор ,љ Астероиды ,љ Любителям астрономии љ . ... Новости обсерваторий проекта] - Обсерватория Кубанского государственного университета от Иванов А - 09.04.2016 11:08:49 . ... 1999-2013 Copyright "Астрономия и Телескопостроение" . ...

... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

... Bad Astronomy . ... Mad Science . ... Site Info . ... Public Talks . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Who is this guy who calls himself "The Bad Astronomer?" ... First, yes, I am a real live astronomer (when people ask me what astronomers do, I tell them "They astronom !" ... These are emitted by powerful objects like black holes, exploding stars, and super-dense neutrons stars. ... Finally, am I really a bad astronomer? ... 2008 Phil Plait. ...

... Major news, from Terry Moseley: "Irish amateur astronomer Dave McDonald has just discovered an asteroid - the first one to be discovered in Ireland for 160 years! ... He said to me afterwards "Now I'll just have to discover one myself!" ... The only other asteroid ever discovered in Ireland was 9 Metis, by Andrew Graham at Markree Observatory in Co Sligo, on 25 April 1848. ... International Year of Astronomy, Ireland National Node . ...

... Exoplanets . ... Artists impression of the blue exoplanet. ... This exoplanet is located in the constellation of Vulpecula, the fox, a faint pattern inside the Summer Triangle.ТљТљ This planet is a not too distant 63 light years away so has been studied by space-based telescopes.Тљ Data collected from Hubbleт??s Imaging Spectrograph (STIS) when this planet moved behind its star showed that in the shadow of the star the light reflected from HD 189733b reduced into the blue part of the spectrum. ...

... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Saturn . ... Astronomers using Keck Observatory discover rain falling from Saturnт??s rings . ... RELATED TOPICS: SATURN | ... NASA-funded observations on the W. M. Keck Observatory with analysis led by the University of Leicester, England, tracked the т??rainт?? of charged water particles into the atmosphere of Saturn and found the extent of the ring-rain is far greater, and falls across larger areas of the planet, than previously thought. ...

Astronomers Detect Coolest Radio Star . ... The new radio-star is much smaller and colder than our Sun.€а With a surface temperature not much higher than that of a giant planet, and a size comparable to JupiterтАЩs, it is scarcely visible in optical light.€а Yet the radio flares seen at Arecibo show it must have a strong magnetic field, implying that the same could be true of other similar stars. ...

Supernova 2009js in NGC 918 . This page is devoted to information on Supernova 2009js in NGC 918 . Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the updates and links web pages. Discovered independently by Lick Observatory Supernova Search (USA) and Koichi Itagaki (Japan). ... 2009/10/11.44 . 17.2 . ... Joseph Brimacombe . ...

M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

... 12a. Inner Belt . ... The inner radiation belt, discovered by Explorers 1 and 3, owes its existence to the extraordinary stability of trapped orbits near the Earth. ... If these are electrically charged, e.g. electrons or ions, they will often end up trapped by the Earth's magnetic field. ... The energetic protons which then materialize are grabbed by the Earth's magnetic field, often on trapped orbits which do not return to the atmosphere, in which the proton can stay trapped for a rather long time...

... 12a. Inner Belt . ... The inner radiation belt, discovered by Explorers 1 and 3, owes its existence to the extraordinary stability of trapped orbits near the Earth. ... If these are electrically charged, e.g. electrons or ions, they will often end up trapped by the Earth's magnetic field. ... The energetic protons which then materialize are grabbed by the Earth's magnetic field, often on trapped orbits which do not return to the atmosphere, in which the proton can stay trapped for a rather long time...

The small solids. Asteroids or the small planetes . ... The comets. ... Ceneca the Young.Procuring about the nature.63 y. The comet is a celestial body of a great size, but a rare one... transparent. Sometimes there seen a core and the medium forms a kind of a tail, beard or dishevelled looks. ... The core is an ice body - conglomeration of frosted gas and dust. ... The comet state is variable: ones have the con tails, others the dust tails, and the third have both. ... Meteors and meteorites. ...

... Information about a variety of different calendars for different cultures (e.g., Christian, Jewish, Muslim, Chinese, Hindu etc.) ... In addition, the Chinese had two different ways of interpreting and observing celestial events. One way the Chinese used astronomy was known as lifa; it was a discipline that aimed to understand the regularities and the predictable events in the celestial system through careful, observations, measurements and records. ... back to Teachers' Newsletter Main Page ...

This is the homepage of Andrew Fruchter, an astronomer on the staff of the Space Telescope Science Institute . ... Here you can look at an HST images of the optical counterparts of gamma-ray bursts and their host galaxies. ... Therefore, substantial information on the fine scale structure of objects can be obtained by offsetting the pointing of the telescope between exposures and then combining these "dithered" exposures into a single image. ...

... The first task assumes the searching for chemical composition and sizes of particles which give the wavelength dependence of the extinction efficiencies close to the observed dependence of . Figure 7: Wavelength dependence of the extinction efficiency factors for homogeneous spherical particles of different sizes consisting of astronomical silicate and amorphous carbon. The dashed segment shows the approximate wavelength dependence of the mean galactic extinction curve at optical wavelengths. ...

... Archives . ... If you do not mind the time predictor, it is hard to believe that this is a light curve, time dependent data. ... It?s hard to say this data set is designed for time series analysis apart from the complication in statistical inference due to measurement errors. How to design the statistical study with measurement errors, huge gaps in time, and unequal time intervals is complex and unexplored. ... The following is R output without measurement errors. ... Chandra Blog . ...

... Bringing news from across the Universe to children all around the world . ... Astronomers have captured this amazing new space photograph showing the birth of a Solar System! Earth and the other seven planets of our Solar System are not alone in the Universe. Over 1800 planets have been discovered around distant stars so far, and this number is rising! Stars and planets form when a giant cloud of cosmic dust in space collapses in on itself. ...