... DENSITY BOUNDING OF GIANT H II REGIONS AND THE IONIZATION OF THE DIFFUSE INTERSTELLAR MEDIUM . ... Three different types of evidence are presented in favour of the hypothesis that the H II regions in disc galaxies with H luminosities greater than a critical value: 10 erg s , are density bounded, and that the escaping Lyman continuum photons from these are the principal ionizing agents for the diffuse ISM in disc galaxies. ... Evidence for density bounding in the most luminous regions . ...

Describes how spatial region boundaries are handled. The golden rule for spatial region filtering was first enunciated by Leon VanSpeybroeck in 1986: . ... With this in mind, the rules for determining whether a boundary image pixel or table row are assigned to a region are defined below. For image filtering, pixels whose center is inside the boundary are included. ... That is, an row is inside the boundary without regard to its integerized pixel value. ...

... 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 NGC 3582 , also known as NGC 3584 and NGC 3576 , uncovered at least 33 massive stars in the end stages of formation, and the clear presence of the complex carbon molecules known as polycyclic aromatic hydrocarbons (PAHs). PAHs are thought to be created in the cooling gas of star forming region s, and their development in the Sun's formation nebula five billion years ago may have been an important step in the development of life on Earth. ... Star Forming Region S106 . ...

... SMIS ] . PROJECT "FOREST FIRES 96" . ... Moscow . ... Vologda (east part) . ... Komi (north part) . ... Komi (south part) . ... Ural (north part) . ... Ural (south part) . ... Tyumen (north part) . ... Tyumen (south part) . ... Irkutsk . ... Krasnoyarsk (north part) . ... Krasnoyarsk (south part) . ... Irkutsk region (north part) . ... Irkutsk region (west part) . ... Irkutsk region (east part) . ... Chita (north part) . ... Khabarovsk (north part) . ... Sakhalin (north part) . ...

. 1. Move the cursor to the start of the text block you want to define. 2. Type M-space (the META character followed by a space). This sets a 'mark' at the start of the 'region'. 3. Move the cursor to the end of the text block you want to define as the 'region'. This sets the 'point' at the end of the 'region'. You do not have to type anything to set this 'point', the 'point' is the location of the cursor.

... Research objects and scientific purposes . Space scientific program includes development and launch of two supersmall spacecrafts "Universitetskiy" and "Kompas-2" intended for monitoring of radiation conditions near the Earth. ... All the studies conducted in the near-Earth space are characterised by strong radiation fields. ... The circular polar orbits, which cover all the near-Earth space, are the most favorable for comprehensive studies of the radiation conditions near the Earth. ...

... 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, . ...

This diagram illustrates two block boxes, one above the other, with rectangular clipping regions of different dimensions. ... Both axes depict increments of 5px. The clipping region of the first P box lies entirely within it, offset 5px from the top and left edges of the P box, and 10px from the right and bottom edges. ... The clipping region of the second P box resembles that of the first in style and position, except that the right edge is 5px to the right of the P box's right edge. ...

. 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] .

. 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 .

... Sea Surface Temperature, restored from NOAA satellite data . You may use Java applet to view temperature maps in more detail. Using the applet, you can build "accumulated" temperature maps from selected data, get temperature values in any point and save the resulting image to your local disk. Date and time of the data . ... 14:25 (GMT) . 3.04.2016 . ... For information send a mail to: info@sputnik.infospace.ru . ...

IBEX (NASA) Voyagers (NASA) .. 2005-2012 1 2, Interstellar Boundary Explorer (IBEX) , . ... 3 Voyger 1 ( 1977, 122 .. Voyager 2 ( 1977, 99.74 .. Interstellar Boundary Explorer (IBEX, 2009, ) + / : SOHO/SWAN, HST, Ulysses/GAS, Cassini : 4 2007 . ... 2: 2007, 84 .. ... Rev., 2009) . ... 6 Interstellar Boundary Explorer ( 19 2008) IBEX ­ ( ) (, 1980-e , ): => () => , 7 IBEX ­ NASA SMEX mission (, , ) ~0.2 to ~6 . ... 1 «stagnation region/layer» ; 12 IBEX: IBEX-Lo - IBEX ( 1997 ) (!! ...

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 ...

. This image from the joint NASA-Japan Aerospace Exploration AgencyтАЩs Hinode mission shows the lower regions of the SunтАЩs atmosphere, the interface region, which a new mission called the Interface Region Imaging Spectrograph (IRIS) will study in exquisite detail. // NASA JAXA/Hinode

. Small black points show all QSOs known previously before the start of this survey. | Front page | . | << - Survey description objectives | . Robert J. Smith, ">rsmith@mso.anu.edu.au Last modified: Fri Sep 24 11:39:02 EST 1999 .

... The project assumes creation of an international space observatory - the interferometer "Earth - Space - Space" in order to perform of astronomical investigations in millimeter, submillimeter and infrared regions with extremely high sensitivity (to a few nanoJanskies units of flux density in continuum spectrum) and extremely high angular resolution (to a parts of microsecond of arc or, possibly, nanosecond). ... radio-interferometric channels of the system "Space - Space", region 0.2 - 3 mm; . ...

... Home Education Astro Answers Astro Answers ? New Horizons: Exploring Pluto . ... Astro Answers . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . Observing Resources for Amateur Astronomers - Part 2: Intermediate Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... Amateur Astronomers Medal . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

. home . product . gallery . contact .

Astronotes Armagh Planetarium's Stellar Blog! ... Planets . ... Of the worlds in our Solar System (gas giants excluded) only Venus has a completely ice-free surface. ... The continued melting of polar ice and consequent freshening of the waters of the Arctic Ocean might stop some ocean currents €аaffecting the lives of hundreds of millions of people.€а Studying the ice worlds of space helps us understand the part that ice has played in the history of our own planet and our present day existence on it. ...