... Flying Over Asteroid Eros West End . ... IC 4406: A Seemingly Square Nebula . ... Exploring Comet Tails . ... In the spring of 1997 and 1996 Comet Hale-Bopp (above) and Comet Hyakutake gave us stunning examples as they passed near the Sun. ... These aurorae were caused by a large interplanetary shock wave that exploded from the Sun on April 4. When the shock wave reached the Earth on April 6, the resulting aurora could be seen in clear skies as far south as North Carolina. ... First page ] Prev. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2006 May 12 . Comet Meets Ring Nebula: Part II . ... Explanation: Moving rapidly through planet Earth's night sky, Fragment C of crumbling comet 73P/Schwassmann-Wachmann 3 passed almost directly in front of M57 - the Ring Nebula, and faint spiral galaxy IC 1296 on May 8. ... About APOD | ... NASA Web Site Statements, Warnings, and Disclaimers . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Stars . ... Telescopes and Observatories . ... The majestic star-forming region in the Lagoon Nebula. The pale ring to the right is an internal reflection in the telescope.€а (Image credit: ESO/ VPHAS+/ V. Kalari and J. Vink (Armagh Observatory) . ... The 18 component images were further processed twice. ... Venu and his colleagues use images like this to identify individual young forming stars in the Lagoon Nebula and determine their ages. ...

... Tonight's Sky . ... The Magazine . ... Star Atlas . ... An artificial comet holds secrets to Earths life . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... The planet has extreme temperature swings and perhaps active lava flows. ... A digital supplement to Astronomy magazine. ... Join TravelQuest International with Astronomy and Discover magazines on one of three great tour options surrounding this celestial spectacle . ... Astronomy Magazine . ...

Photon Scattering: Basic Principle of Photon Scattering . Audio Narration is available . No Scattering: Photon Source and Detector . ... For optical photons, scattering goes as wavelength to the -4 power. In the case of blue photons compared to red photons, this means that blue photons are about 10 times more likely to get scattered than red photons. ... Watch the blue photons scatter away from the detector . ... Interstellar dust make stars appear redder than they really are . ...

... October 9, 1997 . Hale-Bopp and the North American Nebula . ... Explanation: Comet Hale-Bopp 's recent encounter with the inner Solar System allowed many breath-taking pictures. Above, Comet Hale-Bopp was photographed on March 8th in the constellation of Cygnus . ... The North American Nebula is about 1500 light years away, much farther than the comet, which was about 8 light minutes away. ... About APOD > . ...

Classroom Activity: A Viewgraph Comet . ... This will simulate the Earth's orbit around the Sun. ... Draw several comets along the path with their tails pointing away from the Sun. ... You can create other viewgraphs that have a smaller scale and show several comet orbits or constellations. ... Show how the Earth's orbit is almost circular compared to the comet's. Explain that the Sun is at the focus of the orbits of the planets, asteroids, and comets. ... Actually, comets have two tails. ...

... Galileo image of Ida asteroid 114k gif ; 41k jpg . ... Large false color image of asteroid 951 Gaspra 172k gif ; 33k jpg . ... Montage of 11 images taken by Galileo spacecraft of 951 Gaspra 75k gif 75k jpg . ... True Enhanced Color images 140k gif ; 18k jpg ; 596k tiff . ... HST images of 4 Vesta (rotation series) 25k jpg ; 216k gif ; caption . ... Comet Shoemaker-Levy imaged by Hubble/WFPC 145k gif . ... AAT image of Comet Halley (color) 40k gif . ... CCD image of comet Mueller 93a 96k gif . ...

Present section of the Laboratory page is an attempt to describe in Russian the complex of problems connected with asteroid - comet hazard. ... The book is an introductory treatise into the problem of the hazard due to asteroids and comets approaching the Earth. The present day knowledge of the dynamics and physics of asteroids and comets, the estimation of the probability of their impacts on the Earth and connected hazard of regional or global catastrophes are described in the book. ...

... In this sound clip, we journey to the violent heart of a galaxy. We start off flying through the outskirts of a galaxy (hissing noise) passing various stars (different loud hisses) before penetrating the vast nebula surrounding the black hole that lurks in the middle. ... Sounds of Nebulae (864kb). ... Planetary Nebulae: Movie and Sounds (1Mb). ... Comet Song (664kb) Listen as a comet approaches the Sun and bursts into song, before fading back into the outer darkness. ...

Conserved quantities. Energy, momentum, & angular momentum. ... To start with, let us look at a plot of Specific Angular Momentum versus Specific Energy for every historical comet apparition up to 1995. ... Where do asteroids fit in? ... Why do the points of one cluster group around a vertical line? ... h = angular momentum per unit mass of an orbiting body. ... Lines of constant angular momentum are "1/X" functions on a q vs (1+e) graph, but a little more complex if drawn on the above graph. ...

... Comet Ikeya-Zhang, designated C/2002 C1 (Ikeya-Zhang), is named after Kaoru Ikeya of Shizuoka prefecture, Japan, and Daqing Zhang of Henan province, China, who independently discovered it on the night of 1 February 2002. A preliminary orbit reported the following day indicated that it would come moderately close to both the Earth and the Sun and that it might become visible to the naked eye during late March and April 2002. ... Bailey, M.E., Clube, S.V.M. and Napier, W.M. The Origin of Comets . ...

... Posts tagged ?crab nebula? ... An email was forwarded with questions related to the data sets found in ?Be an INTEGRAL astronomer? Among the sets, the following scatter plot is based on the Crab data. ... Tags: ANOVA , block design , crab nebula , F-test , gaussinity , integral , light curve . ... Comment . ... Entries RSS . Comments RSS . ... vlk on [MADS] Parallel Coordinates . upvc windows on [MADS] Parallel Coordinates . ... Alfred Inselberg on [MADS] Parallel Coordinates . ...

... The spacecraft of Magion type have been selected as the subsatellites of the Interball project: Magion-4 (C2-X) for the Tail Probe and Magion-5 (C2-A) for the Auroral Probe. ... Magion-4 was produced in the Czech Republic in collaboratrion with Russia, Ukraine, Hungary, Austria and has onboard scientific instruments and sensors designed and built in Czech Republic, Russia, Poland, Hungary, Romania, Bulgaria and Slovak Republic. ... Plasma flow detector VDP-S (Czech Republic, Russia) . ...

Next: Radial velocity of the Up: Optical spectrum of IRAS04296 Previous: Observations and spectra reduction . ... However, molecular emission features are only very rarely observed in the optical spectra of PPNe. ... On the other hand, it is well known that cometary nuclei spectra show prominent Swan band emission. In both spectra of IRAS04296 we have discovered strong emission in the (0;0) and (0;1) bands of the Swan system of the molecule. ... Now consider the case of IRAS04296. ...

. All images Copyright by Vasiliy V. Rumyantsev , 1998 . For personal viewing only. If you have any questions or suggetions or if you want to use these images contact me . Page created: 28 December 1998 . Last update: 23 Sept. 1999 .

... Astro Images . ... 3 Columns | ... Comet Swan . ... Comet Hale-Bopp over Egypt . ... Digital California Nebula . ... Digital North American Nebula . ... Digital Trifid Nebula . ... Digital Swan Nebula . ... Digital Rosette Nebula . ... Digital Andromeda Galaxy . ... Red Aurora . ... Orion with Aurora . ... M101 Spiral Galaxy . ... Comet Hale-Bopp . ... Whirlpool Galaxy . ... Horsehead Nebula (close up) . ... North American Nebula . ... Lagoon and Trifid Nebula . ... www.astronomy.net . ...

Figure 1. ... Scattering geometry illustration. ... Maps of scattering angle in the cluster core for standard GCW grains and a Model A nebula (left) and UV-altered GCW grains in the same model (right). ... Degrees of consistency between the scattering angles of different models at different wavelengths. ... Schmidt scattering angles over a wider area. ... Schmidt line-of-sight separations over the same area, derived for two different simplified geometric models. ...

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. ...

The UVKLIB spectral library (A.J. Pickles, PASP 110, 863, 1998) provides spectra for different spectral types in the domain 115-2500 nm with a step size of 0.5 nm. Kurucz model spectra cover the range 100-1100 nm with a step size of 0.1 nm. ... Produced by J. R. Walsh (Space Telescope European Coordinating Facility), May 1996. ... File Name Spectral coverage Comments (angstroms) elliptical 1235 - 9935 - s0 1235 - 9940 - sa 1235 - 9940 - sb 1235 - 9940 - starb1 1235 - 9945 starburst with E(B-V) . ...