... Here some data observed on the 6m telescope with IFP installed in the OLD focal reducer are presented. ... Mkn 3: velocity field . ... NGC 5252: [OIII] image . ... NGC 5252 was observed 23 Feb. 1998 in the [OIII]5007 emission line with CCD TK1024 as detector. ... We observed the ionized gas velocity fields of the spiral galaxies with two purpose. ... Restored velocity field of NGC 157 in the reference frame rotating with the pattern speed overlaid on the Ha image of the galaxy . ... NGC 4100 . ...

... Science Users Information > Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: Planetary Nebulae and HII regions in the Elliptical Galaxy NGC 5128 . ... NGC 5128 is the closest example of a giant early type (elliptical or S0) galaxy. Although often dubbed as a peculiar elliptical galaxy since it has a dust lane with recent star formation and an active galactic nucleus, the majority of early type galaxies have similar structures as revealed by recent surveys. ...

... About ATNF overview . ... Australia Telescope Steering Committee . ... LMC H II Region Luminosities versus . Observed Ionizing Stars . ... These values are compared to the observed H II region luminosities, yielding an estimate for the mean fraction of H-ionizing photons that escape the local nebulae in this sample. We formally estimate that, overall, 0-51% of the ionizing radiation escapes the local H II regions and is available to ionize the warm, ionized medium in the LMC. ...

Although I am interested in the nebular physics of PNs, my main interest is the dust in and around PNs. We normally observe the dust either from the mid-infrared spectra of PNs (see below) or by direct imaging. ... Image credit: NASA, ESA, and R. Ciardullo. I study the dust in and around PNs to see how it compares to the dust in evolved stars and proto-planetary nebulae . ... This spectrum was taken with the slit oriented along the bright bar of the nebula (see the PN images page ). ...

... Height from the galactic plane 65- 75 A11 --- IRAS IRAS name 81 A1 --- l_F12 limit flag on F12 (upper limit ) 83- 90 E8.2 Jy F12 IRAS flux density at 12 micron 92 A1 --- l_F25 limit flag on F25 (upper limit ) 94-101 E8.2 Jy F25 IRAS flux density at 25 micron 103 A1 --- l_F60 limit flag on F60 (upper limit ) 105-112 E8.2 Jy F60 IRAS flux density at 60 micron 114 A1 --- l_F100 limit ...

... Young super-Jupiter found wandering without a parent . ... Astronomy for Kids . ... Tune into the Asteroid Day press conference . ... Astronomy 101 . ... How can six Trojan asteroids reside in Neptune's L4 region without colliding? ... The gravity of a planet, its star, and the centrifugal force associated with the planetary orbit nearly balance in five regions near the planetт??s path where an asteroid (or spacecraft) could orbit safely. ... Get instant access to subscriber content on Astronomy.com...

... An ionospheric trough is a region of decreased F layer plasma density. ... It is quite typical to make a distinction between the sub-auroral troughs at mid-latitudes, and high-latitude troughs within the auroral region or polar cap . ... working for mid-latitude trough and some types of high-latitude troughs, like the polar hole . ... Collis, P. N., and I. HДggstrЖm, Plasma convection and auroral precipitation processes associated with the main ionospheric trough at high latitudes, J. atmos. terr. ...

... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

SAS home . ... This thread contains a step-by-step recipe to extract PN spectra of a point-like source observed in Imaging mode and to create associated response matrices, starting from a calibrated, concatenated event list (either produced with epproc or available as PPS product; here it has the assumed file name PN.fits ). ... The users should note that the SAS metatask xmmselect allows them to interactively define source and background regions (via ds9) and to run backscale on the fly. ...

I-GALFA View of a Galactic Tangent Region . ... Image featured in NAIC Newsletter #46 . I-GALFA image of hydrogen gas in a tangent region outside the Sagittarius arm. ... Because we are viewing this gas in a direction closely aligned with (tangent to) its orbital motion, it appears to be moving away from us (we are orbiting the Galactic center with a similar speed, but our own motion in a different direction). ... The gas near 60 degrees longitude is being viewed tangent to its orbital motion. ...

... The TRACE images may be used without restrictions in publications of any kind. ... These two images, taken on 18 November 2000 at 15:54UT and 16:11UT, respectively, show such an event: the red circle in the image to the left shows a region where many loops are cooling, with bright loop tops (the intensity scales with the square root of the image to reduce the dynamic range). ... See also a collection of images related to the Sun, other cool stars, and solar-terrestrial effects . ... Images | ...

... A detailed study of two consecutive bright points observed simultaneously with CDS, EIT and MDI is presented. The analysis of the evolution of the photospheric magnetic features and their coronal counterpart shows that there is a linear dependence between the EIT Fe XII 195? flux and the total magnetic flux of the photospheric bipolarity. ... In a follow-up study, we used wide slit (90arcsec240arcsec) movies of four EIT coronal bright points (BPs) obtained with CDS. ...

... 2008 September 24 . Active Region 1002 on an Unusually Quiet Sun . ... Explanation: Why has the Sun been so quiet recently? ... Our Sun has shown few active regions -- that house even fewer associated sunspots -- for over a year now, and such a period of relative calm is quite unusual. ... Visible above, this region, dubbed Active Region 1002 (AR 1002), was imaged in ultraviolet light yesterday by the SOHO spacecraft , which co-orbits the Sun near the Earth. ... About APOD | ...

GJ 205 Other Names HD 36395 / Wolf 1453 (RA, Dec) 2000 (05:31:24.85, ­03:38:53.4) (l II b II ) (206.93, ­19.45) Spectral Type dM1.5 Distance 5.7 pc m V 7 m :98 B \Gamma V 1.5 [m=H] 0.5 ROSAT/PSPC 0.19 cts s \Gamma1 EUVE /DS 0.02 cts s \Gamma1 EUVE Observation Jan/Feb 1997 [394.1 ks] GJ 411 Other Names HD 95735 / SAO 62377 (RA, Dec) 2000 (11:03:22.58, +36:02:09.6) (l II b II ... The line strengths were computed using a solar­type Active Region DEM and a Quiet Sun DEM (Brosius et al. ...

To a special Solar Physics issue on the Bastille Day Event: . ... Multi-scale temporal features of the 14 July 2000 meter-wavelength dynamic radio spectrum compared with TRACE data . ... Figure 1 (100 KB). SOHO/EIT (a) and LASCO/C2 (b) images show the region of the eruptive flare event of 14 July 2000 and related halo CME. ... Figure 2 (47 KB). ... Figure 3 (115 KB). Medium-scale dynamic spectrum (a), 204 MHz metric (b) and 3000 MHz microwave (c) profiles of the "Bastille Day" event. ...

... Colorful Star Clouds in Cygnus . ... Featured here is a star forming region rich in glowing gas and dark dust toward the constellation of the Swan (Cygnus), near the bright star Sadr. This region, which spans about 50 light years, is part of the Gamma Cygni nebula which lies about 1,800 light years distant. ... The rim of the blue galaxy pictured on the right is an immense ring-like structure 150,000 light years in diameter composed of newly formed, extremely bright, massive stars. ...

... Transitions between these levels gives line at 1.25 cm. ... 1.0 L/M=0.998 0.8 1.0 i=30 0.8 o Flux (arbitrary) 0.6 Flux (arbitrary) 0.6 0.4 0.4 0.2 0.2 D E 0.6 F 0.8 / 1.0 1.2 1.4 1.6 0.0 0.6 0.7 0.8 0.9 / 1.0 1.1 1.2 0.0 0.2 0.4 (a) Two wings 1.5 1.0 L/M=0.998 0.8 1.0 (b) Var ying rotation Flux (arbitrary) 0.6 Flux (arbitrary) C B 1.0 / 1.2 1.4 A 1.6 0.4 0.6 0.8 0.5 0.4 0.0 0.2 0.0 0.2 -0.5 0.4 0.6 0.8 / 1.0 1.2 (c) Var ying inclination (d) Data Figure 1: Fe line from accretion disk round black hole...

... Sun images . ... Sun flares . ... Active areas . September : 2009 . ... No sunspots and sunspot groups can be currently observed on the Sun's surface . The following H-alpha plages without spots can be currently observed on the Sun's surface . ... Coordinates . ... Coordinates and other characteristics of active regions are issued for September 09, 2009 00:31 UT . Last updated: September 10, 2009 00:00 UT . ... 7(499)132-65-96, Fax: +7(499)132-65-97 . ...

... We report on our ongoing project ``Infrared Study of HII Regions Associated with Small Clouds.' ... These IR data, combined with optical imaging (which will be obtained from the IAC-80 telescope), IRAS survey maps, and existing CO observations of the associated clouds, will allow us to undertake a detailed investigation of the gas-to-dust mass ratio, initial mass function and the star-formation efficiency in these complexes. ... CHECKPSF: check the PSF (Point Spread Function) model, . ...

. Statistics of sunspot activity . The sunspot indices . My observations . NGDC's observations . The solar regions . Links . About authors . Russian pages . The solar regions . NOAA 11300's . NOAA 11200's . NOAA 11100's . NOAA 11000's . NOAA 10900's . NOAA 10800's . NOAA 10700's . NOAA 10600's . NOAA 10500's . NOAA 10400's . NOAA 10300's . NOAA 10200's . NOAA 10100's . NOAA 10000's . NOAA 09900's . NOAA 09800's . NOAA 09700's . NOAA 09600's . NOAA 09500's . NOAA 09400's . NOAA 09300's .