... 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 . ... Sculptor Galaxy NGC 134 . ...

... 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 | ...

This source is hiding behind our Galaxy at a distance of ~18 Mpc, located at a galactic latitide of 0 degrees. ... As we look towards longer wavelengths, 60 micron, to try and penetrate the Galactic Plane, we still see confusion from galactic sources. ... If the image seems some what confusing that is because the MOST is a continuum radio telescope and when it looks in the direction of our Galaxy it detects radiation from sources within our Galaxy and from sources that may lie behind our Galaxy. ...

Next: Discussion Up: The Second EGRET Catalog Previous: First Catalog Sources . In the first EGRET catalog, upper limits were given for selected objects not detected during the Phase 1 all-sky survey. These upper limits are determined using the likelihood calculation and depend on the EGRET exposure to a given direction, the contribution of the diffuse gamma radiation, and the proximity and strength of detected sources. ...

... NASA's Hubble Space Telescope has detected a long-sought population of comets dwelling at the icy fringe of the solar system . The observation, which is the astronomical equivalent to finding the proverbial needle-in-a-haystack, bolsters proof for a primordial comet reservoir just beyond Neptune , currently the farthest planet from the Sun . ... The comet-disk lies just beyond Neptune and might stretch 500 times farther from the Sun than Earth . ... Comet Introduction Kuiper Belt Objects . ...

Astronomy Discussion Forums . ... God and Science ћ SETI ћ Software ћ UFO ћ XEphem . ... SETI Assumes ET Doesnot Care About Can Being Detected What If . ... Post Message | ... My search on how to go undetected in space and SETI Search for Extraterrestrial Intelligence SETI. ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... Data Handling and Products > Data Reduction FAQ > Why do I get the message that "no slits could be detected", even though in the raw frames I can clearly see the slits? ... Observing with ESO Telescopes . ... ESO-MIDAS . ... 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: 04.04.14 ESO . ...

Target Acquisition Reference Information . Figure 7.1 on page 88 shows mean predicted count rates as a function of (B - V) 0 color for the four acquisition mirrors. Also shown are the fits to the predicted count rates for different amounts of reddening. ... You can estimate target acquisition count rates using the plots instead of Table 7.1 on page 92 : . ... Read from the Figures (depending on the mirror used) the predicted count rate. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Camera 1 . ... At 0230 in the morning of 23rd of April, a bright fireball was detected by the Armagh Observatory video meteor station. ... The fireball was also detected by Robert Cobain's meteor station in Bangor where its brightness was estimated to be -11. From Armagh, its brightness was comparable to, if slightly less than, that of the Full moon. ... Video Meteor Station . Meteor Log NI . ...

... ChaMP internal optical source ID . ... Then for each detected filter (g,r,i) we list the SExtractor outputs (see Bertin, E., & Arnouts, S. 1996 A 117, 393 ). ... FLAGS . ... SExtractor flags: . ... The object has neighbors, bright and close enough to significantly bias the photometry, or bad pixels (more than 10% of the integrated area affected). ... At least one pixel of the object is saturated (or very close to). ... Object's aperture data are incomplete or corrupted. ... Images & Data | ...

... Meta Index / Home Page This section documents warnings and errors generated by this task (if any). ... error . ... The exact error is reported. corrective action: Move on to the next set of tests. ... odfcheck has detected that the attitude is more than allowedbadattitudefraction% of the time more than nrms r.m.s. away from the median. corrective action: Continue. ... odfcheck detected an error while running hkgtigen . The exact error is reported. corrective action: Continue with the current test. ...

... Gravitational wave search provides insights into galaxy evolution and mergers . ... milky way . ... Astronomy for Kids . ... Has dark matter ever been detected in or around the Milky Way Galaxy? ... While some scientists claim theyт??ve seen evidence of a т??windт?? of dark-matter particles, most members of the astronomy community believe this was a false detection and direct observation of this mysterious material hasnт??t happened yet. ... Get instant access to subscriber content on Astronomy.com!...

Impact ­ Produced Exosphere of Europa A.A. Berezhnoy Sternberg Astronomical Institute, Moscow, Russia Equilibrium chemical composition of the impact-induced cloud 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 3000 3500 4000 T, K 4500 OH H2 5000 O 5500 H H2O Q 0.0045 0.004 0.0035 0.003 0.0025 0.002 0.0015 0.001 0.0005 0 2000 Na NaO H NaO 3000 T, K 4000 5000 1.E-01 2000 Q 1.E-02 1.E-03 1.E-04 T, K 2500 CO 3000 ... Previous detection of cometary impacts on Europa is very tentative. ...

... During the analysis of the surveys carried out on RATAN-600, it was found that almost one fifth of the detected sources shows significant radio flux variations. ... We used the data from "Cold" radio surveys carried out with RATAN-600 in 1980-1994 to search for radio sources with significant flux variability. ... On possibility of detection of variable sources using the data of Cold surveys carried out on RATAN-600. ... Detection of Variable Sources Using the Data of "Cold" Surveys. ...

... 2015 . ... Observations using the Arecibo S-band (2380 MHz, 12.6 cm) planetary radar system started in 1976 and its power and sensitivity were greatly improved with the telescope upgrade and Gregorian-dome installation in the mid-1990s. Below, we show the number of near-Earth asteroids attempted and detected since the radar program resumed in 1998. ... The number of NHATS objects detected with Arecibo similarly jumped in 2012, and 2015 was again a record year, where we detected 23 of these objects. ...

Next: Gamma-Ray Bursts Up: Detection rate of binary Previous: Detection rate of binary . Figure: A schematic dependence of the detection rate ratio on the detector sensitivity (the upper scale) and the limiting distance from which binary NS (1.4+1.4M , the middle scale) and binary BH (8.5+8.5M , the bottom scale) mergings can be detected. ... At the end of this segment evolutionary effects can affect the detection ratio (the dashed line). ...

THE CHEMICAL COMPOSITION OF REGOLITH AT THE MOON'S SOUTH POLE, ACCORDING TO DATA OF LUNAR PROSPECTOR AND LUNAR RECONNAISSANCE ORBITER MISSIONS. ... Introduction: The article tells about the results of integrated study of the craters at the Moon's South Pole with permanently shadowed region of craters. ... We have compared the ultimate composition of the soil matters in the craters with "cold traps" in the Moon's South Pole with regard to thorium, ferric oxide and hydrogen contents (Fig. ...

... Using multifrequency radio data obtained with the GMRT, VLA and RT, we are defining a sample of young radio AGN in the Spitzer FLS field which are associated with midinfrared sources. ... GMRT Observations The Spitzer extragalactic First Look Survey (FLS) field was observed with the Giant Metrewave Radio Telescope (GMRT, Figure 1), Pune, India, at 610 MHz in March 2004. ... Figure 1: Three of the antennas in the inner square kilometre of the Giant Metrewave Radio Telescope (GMRT). ...

... The standard science quicklook processing produces over a dozen sky maps at each downlink, and these maps are automatically searched for potential transient point sources. ... We have found that a heuristic modification of a formula derived by Li & Ma (1983) provides reasonably accurate estimates of p -values for point source detections even for very low p -value detections. ... Case 1u. The most straightforward approach uses the signal , where . ... To get a p -value, use . ...

Optical Spectroscopy of the Eastern Filament of W50 O. Maryeva, P. Abolmasov, A. Burenkov and A. Moiseev Abstract: We present the results of long-slit and FPI spectroscopy of the Eastern optical filament of the radionebula W50, associated with the well-known peculiar binary SS433. ... Our results are consistent w ith the optical filaments being powered by the EUV/X-ray radiation from high-velocity shock waves in the Eastern lobe of W50 or from SS433. ...