... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

... Credit Copyright: Paolo Lazzarotti Explanation: This was one strange sunset. For one thing, the typically round Sun appeared distorted, geometrically, and multiply layered . ... When layers of the Earth's atmosphere are unusually warm, layers of the Sun may appear distorted or even seen multiple times. ... Publications with keywords: sunset - green flash . Publications with words: sunset - green flash . ... Golden Gate Sunset: Green Flash . ... A Green Flash from the Sun . ...

... Because of the Sun 's UV radiation, Earth 's upper atmosphere is partly (0.1% or less) ionized plasma at altitudes of 70-1500 km. ... Around the plasma density maximum (F-layer, see below) a so-called ionospheric waveguide is formed for magnetosonic waves . ... It is interesting to note that this works also the other way round and, for example, the auroral kilometric radiation created by the precipitating particles high above the ionosphere does not reach the ground because of the ionospheric E...

... 2015 September 8 . Distorted Green Flash Sunset over Italy . ... For one thing, the typically round Sun appeared distorted, geometrically, and multiply layered . For another, some of these layers appeared unusually green. ... Different colors of the Sun may also become deflected by significantly different amounts, so that the uppermost superior image may appear momentarily green -- a phenomenon known as a green flash . ... Follow APOD on: Facebook , Google Plus , or Twitter . ... About APOD | ...

Hot subdwarfs are hots stars with masses somewhat less than that of the Sun. ... They are known as sdB stars because their spectra are dominated by hydrogen lines. ... Normally, a red giant will switch on core helium burning without losingthe layers of hydrogen around the helium core. sdOB stars are related to sdB stars, possibly being the sdB stars which have completed core helium burning and are evolving to become white dwarfs. ... Such stars are known as PG1159 stars and DO white dwarfs. ...

Titan . ... Hubble Space Telescope Images of Titan's surface . ... Later that year, it will release the European-built Huygens probe for a descent through Titan's atmosphere. ... This artist's rendering shows the European Space Agency's Huygens probe descending into the atmosphere of Saturn's moon Titan after being released by NASA's Cassini spacecraft. ... This artist's rendering shows the Huygens probe on the surface of Saturn's moon Titan after being released by NASA's Cassini spacecraft. ...

... On the morning of Thursday, 26 February, amid the Gal pagos Islands, the Sun will fade from view. Not the culmination of ancient prophecy, but none less mystical, Earth's small Moon will be executing a slow slide past the enormous Sun. ... And anyone living in southern North America, Central America, northern South America, or on islands and cruise ships in the Caribbean Sea will, weather permitting, have the opportunity to experience the wonder of a solar eclipse. ...

... Data Reduction FAQ > The reduced science spectrum displayed in the Reflex window appears good but when I try to plot it, it is quite different. How can I get it? ... Observing with ESO Telescopes . ... ESO-MIDAS . ... Reflex . ... ESO Data . ... ESO HST Image Galleries . ... ESO Data Access Policy . ... ESO Science Newsletter . ... ESO Annual Reports . ... Seminars at ESO Santiago . ... Seminars at ESO Garching . ... ESO Telescope Bibliography . ... Last Update: 01.04.14 ESO . ...

... Peter B. Mozhaev , Ph.D. Complicated crystal structure and anisotropy of physical properties of the high critical temperature superconductors (HTSC) makes difficult reproducible fabrication of the multilayered epitaxial heterostructures of HTSC with necessary parameters. ... The goal of this project is study of growth and formation of the multilayer epitaxial heterostructures of HTSC of the ReBa 2 Cu 3 O x family (ReBCO, where Re is the rare earth element). ...

... part 1 | ... The Basic Stages in Earth's Pre-geological Development . ... After fragments of the Vortex sleeves separated, whirlwinds of second and third orders ("NC" - new micro-vortex) were generated- future planet cores and their satellites - all of them developing independently, governed by the common laws of development of cosmogenic vortexes. ... Our planet's core today is comprised of considerably deteriorated cosmogenic vortex; consequently, the Earth has a moderated magnetic field. ...

Text of report The subject if our report is the influence of the structure and physics of the uppermost superadaibatic layers on the oscillational spectrum of p-modes. ... In our report we will try to use a most simple representation of the spectrum, plotting the differences between theoretical (that is models') and observational frequencies against a frequency. ... It allow us to focused on the effects of the uppermost layers and ignore possible sophistications from effect of more deeper layers. ...

COPRATES CHASMA NORTH WALL INTERIOR LAYERED DEPOSIT: LAYER MEASUREMENTS AND COMPARISON WITH JUVENTAE CHASMA ILDS USING MARS EXPRESS HIGH RESOLUTION STEREO CAMERA (HRSC) DERIVED TOPOGRAPHY Michael, G.1, E. Hauber1, K. Gwinner1, R. Stesky2 ... Planets, Freie Universitaet, Berlin, Germany 5ESTEC, ESA, Noordwijk, The Netherlands Introduction: The interior layered deposit ( ILD ) in the north wall of Coprates ... The lesser section of the ILD is confined by a ridge of the chasma wall. ...

Solar Large-Scale Chains: Some Events . ... The chains appear to light up separators or quasi-separatrix layers between different interacting large-scale magnetic flux systems in the global solar magnetosphere and, in particular, to outline large-scale coronal structures involved in the CME process. ... Some features of the chains and their relations to CMEs are illustrated for a number of halo CME-associated events. 23 events of 1997-2000 . ... Halo-CME-associated events of November 1997 . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Earth Satellites . ... Leonid meteors seen from 13 km altitude aboard an aircraft during the 1999 Leonids Multi-Instrument Aircraft Campaign (Leonid-MAC). Comet Tempel-Tuttle provides the cometary debris for the Leonid meteor shower. ... Every 17-19 November Earth crosses Tempel-TuttleтАЩs orbit and the Leonids become visible. With clear, dark skies observers may see 10 to 15 Leonid meteors every hour on those mornings. ...

... 24a.The Rotating Earth . ... He projected the Sun's magnified image from his telescope upon a flat white surface, and observed it there. ... The Sun's average distance from Earth, also known as the "astronomical unit" (AU), is about 150 million kilometers (93 million miles), but measuring that distance is not easy. ... Above that came the solar corona ("crown"), glowing tufts that faded into the distance, though time exposures with sensitive cameras managed to trace them to several solar radii. ...

. The sharply-defined crater just above the center of this Cassini image shows layers of alternating bright and dark material. A thin dark layer on the crater wall appears to define the base of an ejecta blanket. Cassini was 8,314 miles (13,377 km) from Phoebe when this image was taken. NASA / JPL / CICLOPS

. Bishop School . Gallery of Activities . in Action .

T O TH E EDITO R 247 DIMENSIONAL EFFECT IN A METAL IN MULTIPLES OF A CERTAIN MAGNETIC FIELD V. F. GANTMAKHE R Institute for Physics Problems, Academy of Sciences, U.S.S.R. Submitted to JETP editor May 18, 1962 J. Exptl. ... The thickness of the plate was 0.39 mm , the electron mean free path reached (1--3 ) x 10-1 cm at helium temperatures, and the skin-effec t depth was 10 - 4 cm at 1--5 MHz. ... 1 V. F. Gantmakher, JET P 42 , 1416 (1962), Soviet Phys. JET P 15, 982 (1962). ...

Astronomy Discussion Forums . ... Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... New Model: How Do The Sun And Moon Appear To Move Across The Sky . ... Post Message | ... focused on the Sun and the Moon as they appear from the given location of the Earth surface: . ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

Proposal Identification No.: T2085 Date Received: 2005­Jan­31 21:48:11 Technical Page Proposal Type: Regular General Category: Terrestrial Aeronomy Sub­Category: Radar Observation Category: Thermosphere Total Time Requested: 48 Hours Proposal Title: Radar and optical mapping of the midnight temperature maximum structure during summer nights. ... This instrument is designed to operate automatically with remote control by Internet access. ... X Maybe X Part of the observing run. ...