... Four types of galaxy environments are considered: clusters, centers of groups, other places in groups, and the field. ... In order to check whether the mean ages of the stellar populations depend on environment density monotonically, as the hierarchical par­ adigm predicts, in this work I consider four types of environment separately: the cluster galaxies, the brightest (central ) galaxies of groups, the second­ranked group members, and the field galaxies. ... Group center SB(rs)0# 204 637 1996 Oct ...

Еще в разделе: (Показать все результаты (>39) - sn.sai.msu.ru/ )

• http://sn.sai.msu.ru/~sil/preprints/mnr21990.pdf
• http://sn.sai.msu.ru/~sil/preprints/aspb121.pdf
• http://sn.sai.msu.ru/~sil/preprints/ic3653.pdf

Dynamic Shack-Hartmann System RAPID V. G. Orlov, V. V. Voitsekhovich Instituto de AstronomМa, UNAM, MИxico CONACYT project E9507-1020P UNAM PAPIIT IN104910 Telescopes OAN OAN- SPM 2.1m telescope 1.5m telescope 0.84m telescope 2.1m telescope OAN-Tonanzintla 1m telescope Astronomical site SPM Observing statistics 1982-2002 (Tapia+ 2007 ) Photometric nights : 64.1% Spectroscopic ... Rapid - Dynamic Shack-Hartmann All modern telescopes demand installation of adaptive system. ...

Еще в разделе: (Показать все результаты (>6) - site2010.sai.msu.ru/ )

• http://site2010.sai.msu.ru/static/doc/WHongshuai_site2010.pdf
• http://site2010.sai.msu.ru/static/doc/VKornilov_site2010.pdf

... Planets . ... Stars . Exoplanets . ... Most exoplanets so far discovered fall into the category of тАШhot JupitersтАЩ, these are giant planets orbiting very close to their parent star. ... Note that we have discovered so many hot Jupiters because they are the easiest type of planet to find, they are not necessarily particularly common in the galaxy. ... Subsequently several similar hot and€а fuzzy worlds have been discovered the same way, proving this that this planet is not a one-off oddball. ...

Еще в разделе: (Показать все результаты (>393) - www.armaghplanet.com/ )

• Vulcan: ghost planet | Astronotes
• Sky Wonders for January 2013 | Astronotes
• Leo, Virgo, Bootes and the May Night Sky Wonders | Astronotes

... Tonight's Sky . ... Star Atlas . ... stars . ... APEX turns its eye to dark clouds in Taurus . Behind these clouds lie rich areas of star formation. ... APEX image of a star-forming filament in Taurus. ... In it, newborn stars are hidden, and dense clouds of gas are on the verge of collapsing to form yet more stars. ... The Taurus Molecular Cloud is particularly dark at visible wavelengths as it lacks the massive stars that illuminate the nebulae in other star-formation regions such as Orion. ...

Еще в разделе: (Показать все результаты (>28) - www.astronomy.com/ )

• Dark energy update | Astronomy.com
• Ground-based detection of super-Earth transit paves way to remote sensing of
• Monitoring Mars' dust storm | Astronomy.com

... Bad Astronomy . ... Bitesize Astronomy . ... The Nine Planets . ... Hey, it's either this or one of those really irritating PayPal donation buttons here. ... I have a snack from April 1998 that gives a brief intro to these peculiar objects , but briefly, brown dwarfs (or BDs for short) are objects that are a little less massive than "normal" stars, but bigger than any planets we currently know about. ... A star forms from a collapsing gas cloud. ... One more point: is a BD a star? ... 2008 Phil...

Еще в разделе: (Показать все результаты (>5) - www.badastronomy.com/ )

• Phil Plait's Bad Astronomy: --SPOILERS!-- Review: Armageddon

... AstroImageJ (AIJ) .. ... Reads and writes FITS images with standard headers . ... Provides a time and coordinate converter tool with capability to update/enhance FITS header content (AIRMASS, BJD, etc.) ... Creates color images and with native ImageJ processing power . ... AstroImageJ_Updater . Update operation now updates AIJ version number in Info.plist CFBundleVersion and CFBundleShortVersionString (MacOSX only) . ... AstroImageJ is ImageJ with astronomy plugins and macros installed. ...

Еще в разделе: (Показать все результаты (>37) - www.astro.louisville.edu/ )

• EDM (ImageJ API)
• Moore Observatory Current Weather

... The spectrum of the brightest star, our Sun, shows several dark gaps perpendicular to the flow of it’s colours (figure 1). These so called spectral absorption lines where discovered in 1802 by the English scientist William Wollaston. ... Some stars as Pollux show a spectrum similar to that of our sun with strong Ca II and Fe II lines, others as Sirius or Vega show strong absorption lines of hydrogen, others, as Mira show very complicated spectra due to molecular absorption lines (see figure 5). ...

188. Re:Can Someone Tell Me The Name Of This Star? - an Astronomy Net Education

189. http://kcor.sai.msu.ru/arXiv1002.2360.pdf

190. http://www.2dfquasar.org/Papers/mnr7619_1397-1418.pdf

191. Кавказ, август 2010