Dust emission from the Type II supernova SN 2002hh in NGC 6946 has been detected at mid-infrared wavelengths by the Spitzer Space Telescope from 590 to 758 days after outburst and confirmed by higher angular resolution Gemini North mid-IR observations. ... The minimum emitting radius of 1.1У?1017 cm is too large for the emitting dust to have been formed in the supernova ejecta. ... ADS Citation Query . citations = 25 . ... 2006,6][2007,4][2008,2][2009,4][2010,2][2011,3][2012,1][2013,2][2015,1] . ...

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• The Mass Accretion Rates of Intermediate-Mass T Tauri Stars
• HST this week: 268
• HST this week

... However, while low mass stars are usually found to form in loose groups with densities of a few stars per cubic parsecs, high mass stars are known to form in dense clusters with up to 10000 stars per cubic parsec. ... We have undertaken a survey of a cospicuous number of fields around intermediate mass young stars (Herbig Ae/Be stars, HAeBe) with the aim of detect and characterize the groups of young stars that may have formed together with the HAeBe star. ... BD +404124 - A rich, compact cluster. ...

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• Hubble Uncovers Dust Disk Around a Massive Black Hole (STScI-PRC98-22) A
• serplines (Abstract)
• High-resolution Herschel spectroscopy reveals the proto-planetary disk around

... Chandra , NASA Explanation: Is our Milky Way Galaxy surrounded by a halo of hot gas? ... Since NGC 4631 is similar to the Milky Way , this observation indicates that our own Galaxy is indeed surrounded by a halo of hot X-ray emitting gas, although we are too close to clearly differentiate them from more nearby extended X-ray sources. ... Publications with keywords: hot gas - spiral galaxy - NGC 4631 . Publications with words: hot gas - spiral galaxy - NGC 4631 . ... Nearby Spiral Galaxy NGC 4945 . ...

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• Астронет > Hot Gas Halo Detected Around Galaxy NGC 4631
• XWare > APOD

In the Table below the masses of some asteroids which were determined during the last years are listed. ... The listed values were determined from observations of many test bodies by the weighted least square fit for one perturbing mass and corrections to the orbit elements of all used test bodies. ... based on the observations of 98 asteroids (including 50278) with the values of standard error of mass determination less than 3.0 10 -11 M Sun . ... Mass . ... 3) Mass 121 : 0.74 x 10 -11 M Sun ; . ...

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• Keywords_46
• Keywords_114

... Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: Dynamical models of multiple globular cluster populations around massive galaxies . ... Different techniques have been devised to separate multiple GC populations and perform dynamical analyses. ... Within this project, the PhD candidate will examine mock models of multiple GC populations around massive galaxies, devising `blinded' functional tests and comparing the possible sources of bias in different techniques....

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• Wide-field view of the sky around VFTS 102: the fastest rotating massive star
• A disc around a massive baby star (artist's impression)
• First Circumstellar Disk around a Massive Star | ESO

... 2001 July 25 . Hot Gas Halo Detected Around Galaxy NGC 4631 . ... Explanation: Is our Milky Way Galaxy surrounded by a halo of hot gas? ... Since NGC 4631 is similar to the Milky Way , this observation indicates that our own Galaxy is indeed surrounded by a halo of hot X-ray emitting gas, although we are too close to clearly differentiate it from more nearby extended X-ray sources. The clusters of massive stars probably heat the halo gas. ... About APOD | ...

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• APOD: 2007 May 16 - Dark Matter Ring Modeled around Galaxy Cluster CL0024 17
• APOD: 2015 October 28 - Massive Black Hole Shreds Passing Star
• APOD Index - Stars: Binary Stars

... More on 51 Peg: . The discovery of a Jupiter--mass planet in orbit around the solar--type star 51Peg has been reported by Michel Mayor and Didier Queloz (Geneva Observatory) on October 6th at the 9th Cambridge workshop on "cool stars, stellar systems, and the sun" held at Florence (Italy). ... Recall that the measurements of radial velocity only yield v sin i which in turn gives us M sin i. For most values of i, sin i will be greater than 0.5 and this gives a mass estimate of 0.5 Jupiter masses. ...

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• Dark Matter in the Universe
• Formation of the Galaxies
• Historical Cosmologies

... Research . ... The major problem in HVC research is the unknown distance towards most of the HVCs. ... Thilker et al. (2004) used the Green Bank Telescope (GBT) to map an area of $7^{\circ} \times 7^{\circ}$ around M31 in H i . They discovered a population of HVCs located within a projected distance of about $50~\mathrm{kpc}$ from M31. ... 2004). ... The remaining HVCs around M31 are isolated in position and velocity and may represent primordial, dark-matter-dominated clouds. ...

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• ATNF Daily Astronomy Picture
• HI Observations of the New Sagittarius Dwarf
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... Ultraluminous X-ray sources (ULXs) are located in external galaxies, their X-ray luminosities (10 39 - 10 41 erg/s) are thousand times greater than those of brightest black holes in the Galaxy. ULXs may be supercritical accretion disks around black holes of stellar masses (~10 Solar masses) like that in SS433, or they may be a hypothetical intermediate-mass black holes (hundreds - thousands Solar masses) with standard accretion disks. ... 2) The ULX progenitors were ejected from the star clusters. ...

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• Discovery of an isolated dwarf spheroidal galaxy neighboring the Local Group
• RCJ0311+0507
• Galaxy sector, archive 2002

... Radio emission at around 90 GHz from star-forming galaxies is expected to be strongly dominated by the free-free component due to ionising radiation from massive, short-lived, stars. We present high surface-brightness sensitivity observations at 90 GHz of the nearby star-forming galaxy Messier 66 with resolution of about 9 arcsec (corresponding to a physical scale of about 500 pc) and analyse these observations in combination with archival lower frequency radio and mid-infrared measurements. ...

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• The history of star formation and mass assembly in early-type galaxies Bojan
• The history of star formation and mass assembly in early-type galaxies
• amaze

... Bad Astronomy . ... Bitesize Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... I had to lean backwards a little to make sure we didn't topple over, and as I spun her in a big circle around me I made a little circle on the floor too. ... The Earth, for example, has a mass about 81 times that of the Moon. ... It is mathematically correct to say that it is the barycenter that orbits the Sun, while the Earth and Moon circle the barycenter. ... 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Misconceptions: James McCanney's Nonsense

Large sunspots were occasionally seen far in the past without any instruments, when the sun was dimmed by thick haze, but not much was remembered of those observations. ... Sunspot Cycle (1850 - 1975) . One who was greatly influenced by Schwabe's discovery was an English gentleman of independent means, Richard Christopher Carrington , who devoted himself to the study of sunspots. ... Carrington had seen a flare, of the rare variety that is visible in white light (only about 50 are known). ...

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• Neptune
• Jupiter's Moon Thebe
• The Sun

Twilight observations with MASS/DIMM B. Safonov Sternberg Astronomical Institute Moscow State University Comprehensive Characterization of Astronomical Sites, 2010 B. Safonov (Moscow State University) Twilight observations with MASS/DIMM SITE 2010 1 / 17 Why observe in twilight with MASS/DIMM? ... ASM includes 3 devices sensitive to background: guider, DIMM and MASS. B. Safonov (Moscow State University) Twilight observations with MASS/DIMM SITE 2010 2 / 17 Background in guider. ...

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... Not only can the Sun turn night to day, it can transform obscure 1950s jingles into 1990s alternative-rock hits. ... The sun is a mass of incandescent gas, . ... Studying the Sun can tie together subjects across the curriculum. ... Sunspots and prominences--the tongues of hot plasma which shoot off the Sun's surface and arch gracefully back, following the invisible tethers of magnetic field lines--are just two examples of solar volatility. ... The black dots will be easy to see. ...

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• ASP: Black Holes to Blackboards: Science for the Masses
• ASP: Black Holes: An Introductory Resource List
• ASP: Black Holes

... 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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• (S-7a) The Black Hole at the Center of our Galaxy
• The Sun -- History
• Events on January 10-11, 1997 - INTERBALL observations

Proposal Identi cation No.: A1761 Date Received: 2003-Feb-02 15:48:07 Technical Page Proposal Type: Regular General Category: Astronomy Sub-Category: Spectroscopy Observation Category: Extragalactic Total Time Requested: 200 Hours Proposal Title: A Search for Low Mass HI Clouds in Three Nearby Density Enhancements ABSTRACT: We propose to use an on-the- y mapping technique to search three 50 square degree regions around nearby groups of galaxies for low mass HI clouds with log MH about 6.0. ...

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• http://www.naic.edu/vscience/schedule/tpfiles/vantagP2534tp.pdf
• http://www.naic.edu/vscience/schedule/2013Spring/GehatagA2751.pdf
• http://www.naic.edu/vscience/schedule/2014Spring/BradfordtagA2850.pdf

Next: PULSATION PROPERTIES Up: EXTREME HELIUM STARS: PULSATION Previous: EVOLUTION MODELS . ... These include a detailed comparison between models which predict evolution tracks and surface composition for a given stellar mass and accurate observations of stellar compositions and dimensions. ... Stellar pulsations provide much more powerful tools for determining stellar masses. ... Next: PULSATION PROPERTIES Up: EXTREME HELIUM STARS: PULSATION Previous: EVOLUTION MODELS Simon Jeffery . ...

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• Homepage of Gavin Ramsay
• Stars Beyond Maturity
• Terry Mosely's Bulletins

... Observing . ... Spacecraft capture an Earth-directed coronal mass ejection . ... On August 20, 2013, at 4:24 a.m. EDT, the Sun erupted with an Earth-directed coronal mass ejection (CME), a solar phenomenon which can send billions of tons of particles into space that can reach Earth one to three days later. ... Only registered members of Astronomy.com are allowed to comment on this article. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

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• NASA's Dawn spacecraft enters orbit around asteroid Vesta | Astronomy.com
• New observations of the giant planet orbiting Beta Pictoris | Astronomy.com
• SOFIA observations reveal a surprise in massive star formation | Astronomy.com

This animation shows a galaxy cluster with two mass concentrations (the pink shading indicates the projected mass density) lensing a background field of faint blue galaxies. ... Inside the Einstein ring radius one has radial arcs, and right in the center of the cluster there are demagnified images. The highest magnifications occur at the Einstein ring radius, giving the large tangential arcs. ... Abell 2218 and CL2244-02 are clusters with tangential arcs. ... Tutorial : Part 1 | Part 2 | ...

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• X-ray binaries with relativistic jets -- microquasars
• HI observations
• A General Catalog of HI Observations of Galaxies

Large-Scale Structure of the local Universe with INTEGRAL observatory >200-300 , . ... It is now widely accepted, that practically every galaxy in the local Universe has supermassive black hole and some of these black holes are AGNs. ... 136 ( ) 49- . ... The map of the survey is shown on the left. ... Using Hard X-ray all-sky survey such important properties of nearby Universe as energetics of accretion to the supermassive black holes and large-scale mass distribution of matter were studied. ...

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• http://hea.iki.rssi.ru/conf/hea2007/presentations/26.12.2007/02-cherepashchuk.pdf
• Second Spectrum-RG/eROSITA Conference