Astronomy Picture of the Day . A Galactic Mushroom Cloud . ... 3.02.1999 . ... The resulting 1000 light-year mushroom cloud dwarfs any Earth-borne nuclear explosion , but is small compared to the 60,000 light-year diameter of our Milky Way's disk . The mushroom cloud is one of many similar plumes , and provides important clues to the origin and nature of the Milky Way 's mysterious hot gas halo . ... Publications with keywords: HI - Milky Way . Publications with words: HI - Milky Way . ...

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• Астронет > A Galactic Mushroom Cloud

... February 3, 1999 . A Galactic Mushroom Cloud . ... Explanation: Part of our Galaxy is exploding. Recent radio observations show new details of hot gas expanding rapidly from an energetic star-forming region in our Galactic disk out into our Galaxy's halo . ... The mushroom cloud is one of many similar plumes , and provides important clues to the origin and nature of the Milky Way 's mysterious hot gas halo . ... About APOD > . ...

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• APOD: 2009 April 23 - Sharpless 308
• APOD: 2013 September 5 - M1: The Incredible Expanding Crab

As the Universe expands, gravity pulls on the Universe, and slows the expansion down over time. As we look to great distances, we are looking back in time. If we can measure how fast the Universe is expanding in the past, and compare it to how fast it is expanding now, we can see the total gravitational effect of all matter in the Universe. Here we plot the distance between two galaxies as a function of time. ... Universes with lots of material . ...

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• Untitled1
• COALA - Computational Astrophysics Laboratory
• Marc White - Astrophysicist - The Australian National University

Star formation is often best manifested by bright H II regions.These are regions of hydrogen which have been ionized by ultraviolet photons which are emitted from massive stars (typically stars more than 20 times the mass of the Sun). ... A narrowband filter image centered on this wavelength will then readily reveal these H II regions and hence the current sites of star formation in a galaxy, The luminous blobs that can be seen here are all H II regions . ... NGC 3558 Visual . NGC 3558 Infrared . ...

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• Evidence for Dark Matter
• Comparing Means and Deviations
• Thermal History of the Universe

... Sun . ... Our Galaxy . ... Stars . ... Artist's impression of the red dwarf star CHRX 73 A and its companion object CHRX 73 B. The companion object is around 12 Jupiter masses, and may either be a planet or a brown dwarf. ... In Astronomy-speak, red dwarfs are low-mass stars; our own Sun is 2.5 times as heavy as even the biggest red dwarf. ... In our galaxy, the Milky Way, red dwarfs are the most common type of star . ... Tweets that mention Red dwarfs: The most important stars in the Universe | ...

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• stars | Astronotes - Part 5

... The sample of the Local Volume galaxies (distance smaller than 10 Mpc) gives a unique opportunity to study the properties of galaxies including the weakest objects: the absolute magnitude M B -10 and the virial mass M vir 10 9 M x263C;. ... Luminosity function of the Local Volume galaxies. ... The luminosity functions for galaxies are presented: red dashed line - from the 2dFGRS survey (Norberg et al. 2002); blue dash-dotted line - from the SDSS survey (Blanton et al. ...

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... The sky distribution of the BCGs from the HSS sample is shown in Fig. 6 together with BCGs from the SBS and Case surveys (Izotov et al. [ 1993b ]; Pustilnik et al. ... First, we compare the apparent magnitude distributions of the three samples. ... The similar behaviour of the faint end of the apparent magnitude distributions infers that the Northern BCG sample may have a similar completeness down to this limiting magnitude. ...

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• Artifacts
• Combining Sky Frames
• HyperLEDA documentation: parameter: t

... It is particularly useful for the detection of close binaries, stellar asymmetries, and object diameters. ... Extraction of sub-regions of images would allow its use even for complicated objects like globular clusters. ... A number of other scientific projects for which it would be useful include tracking the expanding nebula in SN1987a, detection of close binaries in globular clusters, and search for asymmetries in giant and supergiant stars. ...

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• Which Instrument to Use: WFPC2, FOC, NICMOS, or STIS?
• Electronic PictureBooks
• Convolving data models with PSF models

... In this work, we investigate some a new possibility to estimate correlations between radio source position catalogs (RSC). ... Catalogs AUS AUS AUS AUS AUS AUS BKG BKG BKG BKG BKG GSF GSF GSF BKG GSF IAA MAO OPA USN GSF IAA MAO OPA USN IAA MAO OPA USN MAO OPA USN OPA USN GSF IAA IAA IAA MAO With correlations, the system to be solve consists of the equations: The key point is to obtain a reliable estimates of ij. ...

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... L-Wide . ... Receiver History . ... Available Filters: . ... Use with e.g. filter 5) NOTE 2 1120-1220 3 1230-1470 4 1550-1820 5 1100-1800 6 1360-1470 7 1320 hipass NOTE 8 1180-1280 9 1280 hipass (ext Output unit. ... Consequently, the calibration for data collected using the hipass 1320 and the hipass 1370 filters only will be mis-calibrated (i.e. by using the opposite polarisation calibration data). ... It is now possible to select any bandpass filter that is not in the 1320 hipass band. ...

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• compare dlpf shapes
• sbn calibration sep01
• VC-Description National Astronomy and Ionosphere Center (Arecibo Observatory)

... About ATNF overview . ... Australia Telescope Steering Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . ... Australia Telescope 20GHz Survey . ... Bright prospects: Comparing the H Survey with large-scale radio continuum emission . ... Prospects for comparisons between the AAO/UKST H \ survey and large-scale radio continuum emission are considered, with particular reference to the recently completed Parkes 2.4-GHz survey of the southern Galactic Plane. ...

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• casacore: casa/Utilities/Compare.h Source File
• casacore: casa/Utilities/Compare.h File Reference
• casacore: casa::Compare_global_functions_ObjCompareFunc Struct Reference

LIPSKIY-RODIONOVA' LUNAR ANTIPODES AS PRECURSORS OF A REGULAR WAVE PLANETOLOGY G.G.Kochemasov IGEM of the Russian Academy of Sciences, Moscow, Russia kochem@igem.ru / Fax: (009)(095)230 21 79 The first observations of the lunar far side allowed to compare it with the near side and draw very important conclusions in the very beginning of planetary studies based on spacecrafts. ... Celestial bodies are dichotomic. ... The concept of celestial bodies includes Sun (a star) as one of them. ...

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• http://selena.sai.msu.ru/Symposium/lipskiy.pdf

... Meta Index / Home Page / Some functions for testing/debugging . This function returns .true. if the given pair of values agree with each other in the given precision (order), or .false. otherwise. LOGICAL(bool) FUNCTION isNearlyEqual(cmp, compared, precision) REAL, intent(in) :: cmp, compared ! or INTEGER INTEGER, intent(in) :: precision END FUNCTION isNearlyEqual . For the pair of the first two arguments, any combination of int8 , int16 , int32 , single and double is allowed. ...

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• compare_columns utility
• XMM Deep Survey Simulations
• compare_realcols utility

... One of the objectives of this work is to derive radial distribution of supernova remnant surface densities in spiral galaxies. ... Other objectives include the comparison of the SNR radial distribution with the radial distribution of HII regions to look for any association between Type II progenitors and the SNRs and comparison of the SNR distribution to the spiral arm patterns. ... Knowing the positions of the SNRs, we can compare their distributions relative to HII regions and spiral arms. ...

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• http://mavr.sao.ru/hq/ssl/maryeva/WR156_poster_2014_eng.pdf
• String Handling: <string.h>

. You can compare any two versions of a file that is under the control of SCCS with the sccsdiff command: /usr/sccs/sccsdiff -r version -r version s. filename . Using this command produces a line by line difference between the two versions of the file. Results are shown in the same format as that produced by the diff command. Examples .

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• Comparing directories
• Comparing files
• Examples of comparing files with the sccsdiff command

... As basic observational stages to be compared with calculations, we have chosen the objects listed in Table  4 . It is important to note that we use the total accretion X-ray luminosity   for low-mass X-ray binaries and not their total number, since the total accretion luminosity in the Galaxy = (average luminosity of the individual sources) (number of sources) (average stage duration) and thus is independent of the poorly known values of accretion rate and accretion stage duration . ...

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• The COOC Criterion (Criterion of Observations versus Calculations)

... Mass . 17a. Measuring Mass . ... A medium-size (1.25 inch wide) binder clip, as is used in offices to hold papers together--the type made of flat blue steel, with two wire handles. ... The theory predicts that the oscillation period should be proportional to the square root of the oscillating mass, including the mass of the clip. Note that gravity plays no part here: the oscillation period would be the same on the Moon or in zero-g. Denoting square root by SQRT, we have . ...

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• Energetic Particles
• Multipoint correlations of the solar wind parameters observed by several
• The Discovery of Atoms and Nuclei

Constraints on Cosmological Models from Cosmic Flows M. J. Hudson et al. University of Waterloo, Canada Cosmic ows are the only probe of the large-scale mass power spectrum available at low redshift. An important statistic is the bulk ow of a peculiar velocity sample with respect to the Cos- mic Microwave background. We compare the bulk ow of the SMAC cluster sample to the predictions of popular cosmological models and to other recent large-scale peculiar velocity surveys. ...

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• Dave Green: G1.9+0.3 (not Nibiru)
• Martin Krause - Filamentation in Heavy Jets
• Supernova Remnant (SNR) Catalogue or Catalog of Galactic SNRs

... Line radiative transfer in C 18 O, HCO + , and CS lines is considered in a spherically symmetric chemo-dynamical model of a starless core, evolution of which is driven by the ambipolar diffusion. Theoretical line profiles are compared to observational data on the well-known L1544 core, which is one of possible candidates for collapsing protostellar clouds. ... Comparison between modelled and observed spectra suggests that L1544 has flattened structure and is observed at some inclination. ...

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... We start investigating the results from a non-magnetized (isotropic) plasma, before including the external magnetic field so important for space physics. ... propagating above the electron plasma frequency, w(pe) (reflection point for the waves) . note that, for very high frequencies, both phase and group velocities are equal to light velocity c, and we have electromagnetic wave in free space: even the electrons are unable to respond to the rapidly oscillating electric field! . ...

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• Energetic Particles
• Dayside aurora [Oulu]
• Auroral Images