... These ice chips were shed from Comet Swift-Tuttle. ... Dubbed NGC 6589 and NGC 6590, the colors of this nebulosity, are caused by gas and dust. ... The Hydra Cluster of Galaxies . ... You are flying through space and come to ... the Hydra Cluster of Galaxies. Listed as Abell 1060, the Hydra Cluster contains well over 100 bright galaxies. ... White Oval Clouds on Jupiter . ... What are those white ovals all over Jupiter? ... Hale-Bopp from Indian Cove . ... Why do many galaxies appear as spirals? ...

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... They cover a period of 4 days in which the Supernova continues to rise in brightness (what astronomers call magntiude). ... First Image Taken on March 11 at 8:22 UT. Second Image Taken on March 12 at 8:52 UT. ... The supernova is the same brightness as in the previous image taken 2 hours ago . ... This image, taken 24 hours after the previous image, shows the supernova to be another 0.21mag (or about 25%) brighter. ... Hopefully the images do show that the brightness of the Supernova is changing. ...

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... Tonight's Sky . ... The Magazine . ... Observing . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... Bright planets meet at dusk . ... Astronomy magazine subscribers can read the full article for free. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter....

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• What is the heaviest element that astronomers can detect? | Astronomy.com
• Astronomers glimpse supernova shockwave | Astronomy.com
• The Real Reality Show: Is Interstellar Travel Really Possible? | Astronomy.com

... Take the air we breathe: its molecules have energies around 0.03 ev (electron volt--see energetic particles ) as fast as a cannonball, though still quite a bit slower than the typical satellite. ... The Sun's plasma is much hotter , and that of the magnetosphere is still hotter. ... They are known as cosmic rays or cosmic radiation . ... Actually, the source of cosmic rays is probably not quite as intense, because cosmic ray particles can stay around the galaxy much longer than starlight. ...

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• Magnetospheres and the Universe

... Its perihelion would occur on April 1, 1997, at which point the comet would be only 0.92 astronomical units from the Sun, just within the orbit of Earth. ... Taken in April 1993, the photo showed the comet over 13 astronomical units from the Sun, well beyond the orbit of Saturn. ... Hale, as in Comet Hale-Bopp, has written a book, Everybody's Comet (available through the ASP Catalog) and coordinated an Internet project, "Hale-Bopp: Live in the American Classroom." ... Anatomy of a comet. ...

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• ASP: An Ancient Universe - Supernova 1987a
• ASP: An Ancient Universe - The Age of the Chemical Elements
• ASP: An Ancient Universe - Overview

... This meteor shower, which reaches a peak of up to 120 meteors per hour, as seen from a clear, dark site, can be observed anytime after about 10.00pm for a few nights either side of the maximum, that is from about the 12 to 16 December. The Geminid meteors, which sometimes appear as brightly coloured relatively slow-moving fireballs, are caused by small particles mostly about the size of marbles or smaller, ejected into space from the surface of the near-Earth asteroid Phaethon . ... NASA Site . ...

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• Armagh Observatory
• THE PERSEID METEOR SHOWER
• Taurid Complex

... 2005 August 12 . A Meteor Shower Fireball Movie . ... The rate of meteors and fireballs is not known for sure, but expected by some to be as high as one meteor flash every minute. ... That fireball was captured by a digital recorded over Wise Observatory during the 2001 Leonid Meteor Shower. The meteor shower poses no danger as few, if any, of the sand-sized flaring bits are expected to reach the ground. ... About APOD | ... NASA Web Site Statements, Warnings, and Disclaimers . ...

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• Bright Sn in NGC 3877
• APOD: 2006 August 14 - Cosmic Rays
• APOD: 2003 November 25 - A Late Leonid from a Sparse Shower

Astronotes Armagh Planetarium's Stellar Blog! ... Meteors and Meteorites . ... Stars . ... Monthly Sky Notes . ... This famous depiction of the Leonids was based on a first hand account of a meteor storm by a minister, Joseph Harvey Waggoner. ... In the autumn the Great Square of Pegasus is visible in the southern night sky. ... I hope this guide to the November night sky is helpful and have fun star sight-seeing! ... Tweets that mention The Leonid meteors: highlights of the November night sky | ...

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• Perseids 2011: All About the Meteor Shower | Astronotes
• Planetarium Shows - Armagh Planetarium
• Leonid meteors 2011 | Astronotes

Thought-Provoking Imagery Shows Sun's Place in the Galaxy . ... SOHO - Explosive Coronal Mass Ejections from the Sun . SOHO-6 Comet at 2-6 solar radii from the Sun . ... The remarkable images come from SOHO's visible-light coronagraph, LASCO, which is able to mask the intense rays from the Sun's surface in order to reveal the much fainter glow of the solar atmosphere, or corona. ... SOHO is ideally placed to report and even anticipate their origins in the Sun's atmosphere. ... The Sun . ...

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• APOD: 2000 January 3 - Cas A Supernova Remnant in X Rays
• A collection of images
• K-band Arcetri Obscured Supernova Search - SNe Intro

... Astronomers could be called the pirates of the sky; they explore new worlds and search for valuable information as loot. ... This corner of the Universe is brimming with astronomical riches, including star clusters, cosmic clouds and stellar nurseries. ... The Rim Nebula creates a wall of dark and bright clouds that marks the boundary of a stellar nursery. Stellar nurseries are clouds mostly made up of chemical called hydrogen, which is the main ingredient for making stars. ... Cool Fact . ...

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• http://www.eso.org/public/news/eso1504/kids/
• ESO - My data shows an extended, bright feature - what can this be?
• CCD artifacts

... This effect is visible in Figure 4.3 which shows a logarithmic stretch of the image resulting from a 100s exposure on a star of V magnitude 2.6 through filter F502N in the PC. Extreme overexposure of the Loral CCDs is not believed to cause any permanent effects, and therefore the WFPC2 does not have a bright object limit. ... This model only works on very highly saturated stellar images. ... Several other artifacts that are common in saturated stellar images are also obvious in Figure 4.3 . ...

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• Absorption line spectra of the UV bright z=2.4 QSO HE 1122-1649
• Making HST Pictures: Illustrations
• Mode = ACQ/SEARCHConfig = COS/NUV

... Club By-laws . ... Other Club Activities . ... Public Nights . ... Dr. James Green, NASA, Director Planetary Science will be our esteemed speaker on Tuesday, April 12, 2016 at 7:30 PM in Peyton Hall on the Princeton University campus. ... Our astronomers setup telescopes for public use at Communiversity in Princeton, Super Science Saturday at the NJ State Museum in Trenton and at various public events around Mercer County. ... Amateur Astronomers Association of Princeton, Inc., ...

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Function: GgiShowShell Purpose: Make shell element visible or invisible Category: USER-INTERFACE File: ggi.src Author: J.P. Terlouw Use: #include "ggi.h" ident shell; bool show; GgiShowShell(shell, show); shell - shell element. show - TRUE: make element visible; FALSE: invisible. Description: GgiShowShell causes a shell element to be made visible or invisible (popped up or down). ... Related documents: GgiShell.dc2, GgiUseShell.dc2 Updates: Mar 31, 1998: JPT, Document created. ...

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• Effect of Cosmic Ray Showers on Gravitational Detectors
• Cosmic Engine: Life of Stars
• Interaction of Cosmic Ray Showers with Material

... Space Weather . ... Energetic Particles . ... Nuclear collisions produce gamma rays (after some intermediate steps) which, like light, move in straight lines, If only we could detect ultra-energetic gamma rays from the sky, we might pin-point sources of cosmic rays. ... They clearly indicate the presence of high-energy gamma rays, but for a long time there was no way of telling if those rays originated in distant space or (more likely) in nuclear collisions of cosmic ray ions in our own atmosphere. ...

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• Magnetospheres and the Universe
• Solar Energetic Particles
• The Sun's Corona

... Analyzing the Cosmic Hand (CNN) . Elements in the Aftermath (APOD) . 3C58: Pulsar Power (APOD) . IC 443: Supernova Remnant and Neutron Star (APOD) . ... Stars Suggest a Quark Twist and a New Kind of Matter (NY Times) . NASA/Chandra image releases: . ... 3C58: Pulsar Gives Insight on Ultra Dense Matter and Magnetic Fields . ... RX J1856.5-3754 and 3C58: Cosmic X-rays May Reveal New Form of Matter . ... 3C58: Young Pulsar Reveals Clues to Supernova . ... Email: slane-at-cfa.harvard.edu . ...

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• dictionary
• Tom's POVRay Thermastatic Shower Valve
• Chandra Images for SNR J0505.8-6801

Next: Radiopulsars as Sources of Up: Cosmic Rays and Evolution Previous: Cosmic Rays and Evolution . Presently, there is little doubt that galactic CR can be generated at rapidly expanding shock fronts produced by supernova explosions. ... Statistical properties of radiopulsars in our Galaxy indicate a formation rate of NS of about 1 per 10-20 years in the present cosmological epoch, while direct astronomical observations have so far not detected supernova explosions at this high rate. ...

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• Radiopulsars as Sources of Cosmic Rays
• Science with CXO

Bright Supernova - Archives On these pages you will find references to Supernovae which have faded into oblivion. ... Finally, in 1999, when I took over the International Supernova Network's Latest Supernovae page I retitled the main page "Latest Supernovae", BUT, it's the "Latest Supernovae" page of the "Bright Supernovae" pages which are also sub-pages of ISN. ... Brightest supernova in 2005 . ... Brightest supernova in 2002 . ... Brightest supernova in 2000 . ... Brightest supernova in 1999 . ...

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• Supernova 1999aa in NGC 2595
• Supernova 2002bl in UGC 5499
• Supernova 1999an in IC 755

The angular power spectrum of the anisotropy of the CMB contains information about the formation of the Universe and its current contents. ... The image above shows an all-sky map with only ell=2 power on the left, and another map with only ell=16 power on the right. ... The current status of microwave background anisotropy measurements in my compilation from the literature has 95 data points from 25 experiments. These are all plotted in the figure below: . ...

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• Index
• Using the sky model
• Gravitational Lensing by Stars

... It turns out one possibility is a form of matter/energy invented by Einstein in the 1920s to make sure his equations of General Relativity did not predict the Expansion of the Universe. Although Einstein was willing to predict several things with his equations of General Relativity, he obviously thought an expanding Universe was too much, and so he invented the Cosmological Constant, which repels itself, and was meant to balance the force of gravity, and make the Universe static. ...

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• Observational Techniques: Units and Coordinates Notes
• C/2006 P1 (McNaught)
• IAU Commission #34 (Interstellar Matter)

... Articles | ... Forums . ... 230 deg . 49 deg . ... 130 deg . ... More Info . ... 210 deg . ... 168 deg . ... 249 deg . ... 195 deg . ... 271 deg . ... 110 deg . ... 338 deg . ... July 15 . 247 deg . ... 224 deg . ... 340 deg . ... July Phoenicids (PHE) . ... August 10 . 341 deg . ... 339 deg . ... 307 deg . ... 334 deg . ... 335 deg . ... 286 deg . ... 327 deg . ... 262 deg . ... 102 deg . ... 153 deg . ... 117 deg . ... December 2 . ... 123 deg . ... 100 deg . ... www.astronomy.net . ...

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• Finding Himalia, The Fifth Brightest Moon Of Jupiter - an Astronomy Net Article
• Angular Speeds Of Meteor Showers - an Astronomy Net General Forum Message
• Perseid Shower 2010 And Ham Radio - an Astronomy Net Observation_reports Forum