... Vela Supernova Remnant in Visible Light . ... 13.02.2007 . ... About eleven thousand years ago a star in the constellation of Vela could be seen to explode , creating a strange point of light briefly visible to humans living near the beginning of recorded history . The outer layers of the star crashed into the interstellar medium , driving a shock wave that is still visible today. ... Publications with keywords: Vela - supernova remnant . Publications with words: Vela - supernova remnant . ...

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• New Shocks For Supernova 1987A
• Vela Supernova Remnant in X-ray
• The Veil Nebula Unveiled

... 2007 February 13 . Vela Supernova Remnant in Visible Light . Credit: Digitized Sky Survey , ESA/ESO/NASA FITS Liberator . ... About eleven thousand years ago a star in the constellation of Vela could be seen to explode , creating a strange point of light briefly visible to humans living near the beginning of recorded history . ... Remaining at the center of the Vela Supernova Remnant is a pulsar , a star as dense as nuclear matter that completely rotates more than ten times in a single second. ...

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• APOD: 2003 February 4 - Wisps of the Veil Nebula
• APOD: 2000 February 17 - New Shocks For Supernova 1987A
• APOD: 2012 February 27 - Shocked by Supernova 1987A

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 . ...

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• Scattering

We report far-infrared and submillimeter observations of supernova 1987A, the star whose explosion was observed on 23 February 1987 in the Large Magellanic Cloud, a galaxy located 160,000 light years away. ... The intensity and spectral energy distribution of the emission suggest a dust mass of about 0.4 to 0.7 times the mass of the Sun. ... Our observations imply that supernovae can produce the large dust masses detected in young galaxies at very high redshifts. ... ADS Citation Query . ...

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• The Hubble Deep Field - version 1 scattered light subtraction
• HST in the Media
• The Hubble Deep Field - version 2 scattered light subtraction

... Australia Telescope Steering Committee . ... Parkes radio telescope . ... Such a model can reproduce much of the observed late-time evolution of the radio flux density and spectral index (though recent results for SNб 1993J (van Dyk et al. 1994) show that the Chevalier model does not adequately describe the early behaviour of radio light curves for this supernova, perhaps due to variations in the mass-loss rate and clumping in the stellar wind, which are not yet accounted for in the model). ...

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• SUPERNOVA REMNANTS, PULSARS AND THE INTERSTELLAR MEDIUM - SUMMARY OF A WORKSHOP
• Pulsar group | Main / Visitors
• ATNF Summer Vacation Student Sympoium Program

Next: *timsort* Up: Timing Analysis Previous: Summary of tasks in . ... Events will be time ordered in the output file. xt> timsort xdata$snr psr ``c 503 513 24'' none A light curve is then generated and plotted so we can inspect the gross properties of the sample (the sequence of good-data intervals and gaps) and any source variability. xt> ltcurv psr none psr 500 xt> ltcplot psr_ltc Finding this sample satisfactory, we search for periodicity with a fast Fourier transform. ...

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• Timing Analysis
• The AstroStat Slog light curve
• *ltcurv* - Generation of the light curve

... STScI-PRC95-11 FOR RELEASE: February 20, 1995 HUBBLE'S CLOSE-UP VIEW OF A SHOCKWAVE FROM A STELLAR EXPLOSION This image shows a small portion of a nebula called the "Cygnus Loop." ... Blue shows emission from "doubly ionized" oxygen atoms (atoms that have had two electrons stripped away) produced by the heat behind the shock front. ... This sulfur emission arises well behind the shock front, in gas that has had a chance to cool since the passage of the shock. ...

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• Virgo Group - Gravitational Wave basics
• FIRST LIGHT OF ARNICA AT TNG
• FIRPO II

... Science Users Information Future Facilities and Development E-ELT jump to navigation jump to content . ... Observing with ESO Telescopes . ... In December 2012 ESO Council fully approved the E-ELT Programme ( more , more , even more , still more ). ... In December 2014 ESO Council approved the construction of the E-ELT in two phases, and authorised spending on Phase 1 . ... 15 Jan 2012] Announcement of the E-ELT Workshop "Shaping E-ELT Science and Instrumentation" , 25 February 01 March 2013 . ...

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• KMOS on the Very Large Telescope at the time of first light
• The KMOS team and other well-wishers at the time of first light
• NANDO PATAT SCIENTIFIC INTERESTS

. Please, enter light elements for your star and Julian Day interval. HJD0: . Period: . JD1: . JD2: .

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Please enter the lightcurve file name and period search parameters: . Lightcurve file: . ... Apply the Heliocentric correction and convert all dates to Terrestrial Time (TT)? ... Also, the Heliocentric correction cannot be applied to such lightcurves. ... This period search service is also available at the mirror sites: Mirror 1 , Mirror 2 , Mirror 3 , Mirror 4 . You may download the latest source code distribution and install the period search service at your own web server. ...

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• The NMW survey homepage

Astronotes Armagh Planetarium's Stellar Blog! ... Our Galaxy . ... Stars . ... Space Flight . ... New observations with the European Southern Observatory (ESO)тАЩs Very Large Telescope of some of the most distant galaxies ever detected are revealing the mysteries of this important phase of the early Universe. ... These powerful instruments are essential for exploring this early period in cosmic history as they alone can enable the accurate observations of €аthese extremely distant and faint galaxies. ...

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• What is a nebula? | Astronotes
• Have you seen the Zodiacal Light? | Astronotes
• Stargazing in June | Astronotes

... Bad Astronomy . Misconceptions . ... Bad Astronomy : "We're light years more advanced than our competition!" ... Even the closest astronomical object, the Moon, is 400,000 kilometers away! ... A beam of light will travel 9,500,000,000,000 kilometers in one year. This distance is defined as a light year ; the distance light travels in a year. ... This is another example of Bad Astronomy; like a light year, a parsec is a unit of distance, not time (to be specific, it equals 3.26 light years) . ...

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• Phil Plait's Bad Astronomy: Bad TV