... Sun images . ... Sun flares . ... Active areas . September : 2015 . ... The following regions with sunspots can be now observed on the Sun's surface . Group number . ... Group length (in degrees) . ... Coordinates and other characteristics of active regions are issued for September 09, 2015 00:31 UT The following H-alpha plages without spots can be currently observed on the Sun's surface . ... Coordinates and other characteristics of active regions are issued for September 09, 2015 00:31 UT . ...

... Now rotating behind the Sun's visible edge, these groups followed close on the heels of another enormous sunspot group which appeared in mid July. ... While individual sunspots are not numbered or cataloged, groups of sunspots, designated solar active regions, are given consecutive numbers as they appear on the visible solar disk . ... Publications with keywords: Sun - sunspot - active region . Publications with words: Sun - sunspot - active region . ... An X Class Flare Region on the Sun . ...

... 2002 August 1 . Sunspots and Solar Active Regions . ... Explanation: July was a good month for sunspots ... really big sunspots. ... While individual sunspots are not numbered or cataloged, groups of sunspots, designated solar active regions, are given consecutive numbers as they appear on the visible solar disk . That numbering began on January 5, 1972 and on June 14, 2002, reached active region number 10,000. ... About APOD | ...

. Home . News . Gallery . Events . Twitter . Press Releases . Links . Contact Us . Calendar . Press & Web Coverage . Previous . Next . List . Deirdre Kelleghan kept observing the Sun and she sent us a new wonderful drawing: "Active Region 10999, June 20th 2008 13:45 UT; PST 40/8mmTVP eyepiece/50X upscaled by eye; soft pastels and graphite on black paper". Thank you, Deirdre! . Tuesday, 24 June 2008 01:52 . International Year of Astronomy, Ireland National Node . [Back To Top] .

One of the first light images taken on April 22, 1998 in 195 Angstroms . Loops viewed on April 25, 1998, seen in 171 Angstroms. ... Active Region seen on April 26, 1998 in 171 Angstroms . ... Flare observed in 1216 Angstroms on May 19, 1998 . ... Post flare loop observations on August 16, 1998 observed in 171 Angstroms . Post flare loop observations on August 16, 1998 observed in 195 Angstroms . ... Active regions observed on August 19, 1998 in 171 Angstroms . ...

Active Region, Feldman et al. abundances, Arnaud & Rothenflug ion balances . Figure 1: Emission Measures (EM) [cm -5 ] derived from combining all lines for particular ions, for the Active and Quiet Sun regions observed by SERTS. Error bars have been shown when multiple lines from the same ion have been combined to produce a single ion-averaged EM. ... Following Brosius et al. (1996), we have assumed solar coronal abundances derived by Feldman et al. ...

Target names are used to provide unique designations for the targets that will be used throughout the proposal. These names will generally also be used in Phase II, and ultimately to designate targets in the HST data archive. ... This facility will be most useful if consistent naming conventions are used. ... If a target is not contained in these catalogs, other catalog designations may be used (e.g., 4U X-ray catalog designation, Villanova white-dwarf catalog number, etc.) ... Target Type . ...

... Tonight's Sky . ... The Magazine . ... Observing . ... Magazine . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Astronomy for Kids . ... active galactic nuclei . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

... Pre-university education . ... Samara region . SSAU History . SSAU roadmap . ... Samara State Aerospace University (SSAU) will take an active part in the work of space activities of the United Nations organization (UNO). ... The road map shape on inclusion of Samara University into implementation of the UN Program on Space Applications was outlined at the roundtable discussion with the University teachers and specialists and at the meeting with SSAU Rector Yevgeniy Shakhmatov. ...

... 1994: . As a result of comparing the spectra of active solar regions from the observations with high spatial resolution in the microwave range at the RATAN-600 (the S-component) with a flare component observed at meter wavelengths on the VLA (USA) we revealed the presence of a strong and prolonged noise storm exactly where a weak decaying active region (with the presence of powerful active regions in the disk) is located. ... Archive . ...

Galaxies are diffuse objects which are imaged against a background of finite brightness and noise. Galaxies which have the maximum contrast with respect to this background are the ones that are first discovered. ... These galaxies have been missed to date but active surveys for them are underway. ... In this page we present several examples of these newly discovered Low Surface Brightness galaxies as well as examples of high surface brightness galaxies. ...

... A database on solar active regions has been implemented in IDL (Interactive Data Language). ... Full-disk 17 GHz radio maps produced by the Nobeyama Radioheliograph provide the basis for the database. Researchers of solar activity often need to access solar active region data. ... So far, we have created an IDL-based database on daily active region data from 1992 July 1 to 1994 December 31 (NOAA 7213 thru NOAA 7821) 2 . ... number of active regions visible on the disk; . ... IDL 1 . ...

... ESO Science Newsletter December 2015 . 17 Dec 2015 . ... This newsletter is a summary of recent ESO Science Announcement items. Follow the links or visit ESO Science Announcements to read more. ... Read more . ... The allocation of ESO telescope time for Period 97 (1 April БЂ“ 30 September 2016) is expected to be emailed in the week beginning 21 December 2015. ... ESO Workshop, ESO Headquarters, Garching, Germany, 27 June БЂ“ 1 July, 2016 . ... Joint ESO, ALMA, NAOJ, NRAO Workshop. ...

Data Archive . Video-records archive . ... 1997 | ... Time (UT) Counter Remarks _______________________________________________________________________________ 05.01. 10:29:17 2:06:42 scan disk 11:58:23 2:11:19 active regions 06.01. 09:49:51 2:12:17 scan disk 10:56:24 2:19:10 active regions 12.01. 09:39:12 2:19:59 scan disk 10:03:41 2:27:51 active region 10:05:09 2:28:34 filament 10:07:17 2:29:10 ...

LARGE-SCALE PHENOMENA AT THE SUN ASSOCIATED . WITH FILAMENT ERUPTIONS OUTSIDE ACTIVE . ... Considering the 12.09.1999 event as an example, we analyze manifestations of large-scale disturbances associated with coronal mass ejections (CMEs) caused by filament eruptions outside of active regions. ... The filament eruption occurred in relatively weak magnetic fields, but it was accompanied by larger-scale phenomena than flare events do. ...

... Basic Research results General information Main characteristics of the Radio telescope Observing programs General view of the antenna array Main research areas Principle of generation of radio images Radio telescope's beam Receiving systems Main characteristics of the base receiving-recording complex Calibrations Data archive and databases Publication of data Possibilities of observing the structure and dynamics of microwave activity SSRT - Research results . ...

... The new emission line galaxies are listed in Table 2 containing the following information: . column 1: The object's IAU-type name with the prefix HS. ... This was not corrected in the figure shown in Appendix A. HS1214+3801 : This is seemingly a supergiant H II -region at the very rim of the nearby edge-on disc galaxy (SA(s)cd) NGC 4244 (V hel = 224 kms -1 and B T =10.88). ... To check this option one needs a detailed map of the NGC 4244 velocity field including HS 1214+3801. ...

... VLBI Schedule . ... Observers Wiki . Schedules . ... Main / . Locate VNC session "pksvnc1", to be found on (usually) the left-most screen of the 4-headed control room machine. ... On the leftmost desktop in this session find the "oprin" window and type; . ... To start a new observing schedule type the following; . ... The second of the four connected displays (on "bourbon") is displaying the VNC session "vlbi's PkMk5B ", which is running on pictor:2 using the vlbi VNC password. ...

... The active time at each angular bin is the sum over frames of the active time contributions from all CCD pixels, within the node-specific telemetry window, which overlap the surface of the bin. ... The active time, per frame, of a normal pixel is the full frame integration time multiplied by the node-specific fractional exposure; bad pixels contribute no active time. ... If an event is rejected for this reason only, then its pixels remain normal in the exposure map. ...

... Radio astronomers at Arecibo Observatory observe a wide variety of phenomena in the Milky Way and in other galaxies. ... Some REU projects are carried out on pre-existing data, and others rely on obtaining new data. ... Deriving a new shape model from existing radar images has been a popular student project in past years, and there are data sets that could be used for this. We are collecting thermal infrared emission data for many of the near-Earth asteroids that are also observed with radar. ...