... 26.08.2013 . ... Credit Copyright: Hubble Legacy Archive , ESA , NASA ; Processing: Delio Tolivia Cadrecha Explanation: It is one of the brightest planetary nebulae on the sky -- what should it be named? First discovered in 1878, nebula NGC 7027 can be seen toward the constellation of the Swan (Cygnus) with a standard backyard telescope . ... August 2013 . ... Publications with keywords: NGC 7027 - planetary nebula - HST . Publications with words: NGC 7027 - planetary nebula - HST . ...

... 2013 August 26 . Bright Planetary Nebula NGC 7027 from Hubble . Image Credit: Hubble Legacy Archive , ESA , NASA ; Processing: Delio Tolivia Cadrecha . ... Studying Hubble images of NGC 7027 have led to the understanding that it is a planetary nebula that began expanding about 600 years ago , and that the cloud of gas and dust is unusually massive as it appears to contain about three times the mass of our Sun. ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ...

Making HST Pictures: Examples and Illustrations . ... These illustrations represent some of the steps and techniques used to produce “pretty pictures” from HST images. ... TIFFs (ftp) . ... Separate images are exposed through different color filters. ... An alternate way to make color images . ... Eight bit (one byte) images contain 256 different values that may be represented by 256 shades of gray or 256 arbitrary colors from a color map (or palette) of all possible colors. ...

... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

In this gallery are many images of Low Surface Brightness Galaxies which have recently been discovered and analyzed. ... The central surface brightness of this galaxy is 24.28 . Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a. The high surface brightness knot in one of its spiral arms actually has the same color, luminosity and H-alpha equivalent width as the entire Large Magellanic Cloud . ... Truly it is a Low Surface Brightness Galaxy. ...

the atoms includes descriptions of the telescope, its components and instruments, as well as detailed measurements. the reports are indexed as shown below. as there is often overlap between categories, a memo may appear under more than one category. the memos are referenced by year-number (i.e. 99-01), the number assigned in the order the memo is received. please note the date of the memos; information contained in the memos may have evolved over time. atoms directory: . ...

... Satellites of the planets are assigned a provisional designation (indicating year of discovery) by the Central Bureau for Astronomical Telegrams ( CBAT ) upon satisfactory demonstration of the existence of a new object. ... In the past, Comets were first given a provisional designation, consisting of the year and a lowercase letter indicating the order of discovery in the year (e.g., 1994a was the first comet discovered or recovered in 1994, 1994b the second, etc.) ... Names .. ...

Supernova 2009js in NGC 918 . This page is devoted to information on Supernova 2009js in NGC 918 . Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the updates and links web pages. Discovered independently by Lick Observatory Supernova Search (USA) and Koichi Itagaki (Japan). ... 2009/10/11.44 . 17.2 . ... Joseph Brimacombe . ...

... Planets . ... Earth Satellites . ... Looking in the direction of the constellation Cygnus the Swan and launched by NASA in 2009 is the Kepler Space Observatory.Many previous missions searching for exoplanets mainly detected large giant planets, like large hot Jupiters (it is easier to detect larger planets).However KeplerтАЩs main objective is to search for much smaller planets located in a habitable zone which is not too close nor too far from their star; planets which may be just like our Earth. ...

... The choice of which type of electricity is called "positive" and which "negative" was made around 1750 by Ben Franklin, early American scientist and man of many talents (the stamp on the left commemorates his role as first US postmaster--and colonial postmaster before that). ... Franklin knew of two types of electric charge, depending on the material one rubbed. ... Later, when electric batteries were discovered, scientists naturally assigned the direction of the flow of current to be from (+) to (-...

The run progress pages document the execution of Service Mode and Visitor Mode observing runs carried out at the Paranal Observatory. A summary of the run's characteristics is given, as well as a time-stamped list of all Observation Blocks (OB) that were executed until now. ... If reduced data for the given run exist, those are also reported in both the OB Summary table and in the details. ... Reduced : information shown only if pipeline-processed reduced data exist for the OB . ... OB ID . ...

Next: Basic Properties Up: R Coronae Borealis Stars Previous: Introduction . RCB stars are named after a star just visible to the naked eye in the constellation of Corona Borealis. RCrB was discovered by Edward Pigott, an English amateur astronomer, who had been observing a star in the `Northern Crown' for over a decade. ... Since 1795, other RCB stars have been discovered and their properties have been carefully observed. ...

... STScI-PRC95-02 HUBBLE VIEWS A STARRY RING WORLD BORN IN A HEAD-ON COLLISION [Right] - A rare and spectacular head-on collision between two galaxies appears in this NASA Hubble Space Telescope true-color image of the Cartwheel Galaxy, located 500 million light-years away in the constellation Sculptor. The new details of star birth resolved by Hubble provide an opportunity to study how extremely massive stars are born in large fragmented gas clouds. ...

In autumn 1994, two groups of astronomers announced that they had discovered Cepheid variable stars in a distant cluster of galaxies. ... As the term suggests, variable stars change in brightness over time. ... Variable stars are an ideal way to get high-school students doing real science, with real data, from the real sky. ... a sky chart to find the stars . ... Students can use the nearby stars to estimate the magnitude of Delta. ... Locate the star Delta in Cepheus and estimate its brightness . ...

Databases (NSDC) of the Natural Planetary Satellites. ... NSDC: Database of astrometric observations of Natural Planetary Satellites . ... They are thoroughly looking for observations in different sources, creating their owndatabases which are then mostly inaccessible to other researchers. ... In the file "content" with explications, the reference is given to the data source as well as the bibliographic reference. ... Data sources. ... Why a specific bibliographic database for Natural satellites? ...

... This page is intended for those with a technical background who want more detail than was available in the press releases. 23) 5% of the sources. ... Radio quiet quasars have essentially uniform B-K colours (around 2.5) while these Parkes sources had B-K ranging from 2.5 out to 8! ... Dust: these actually are typical blue quasars obscured by dust somewhere along the line of sight. ... They appear pink to the human eye (I combined out BVR imaging weighted such that a sun-like star would appear white)...

... 1100 FTT/NAS . ... 1120 Camera . ... 1140 Camera Mount & Enclosure . ... 1170 Test Equipment . ... 1200 FLC . ... MRO-PLA-CAM-0000-0106 FTT/NAS & FLC Development Plan . ... MRO-ICD-CAM-1000-0109 "FTT/NAS,FLC-UTE" FTT/NAS & FLC to Enclosure ICD . MRO-ICD-CAM-1000-0110 "FTT/NAS,FLC-NOT" FTT/NAS & FLC to optical table ICD . MRO-ICD-CAM-1000-0111 "FTT/NAS,FLC-UT" FTT/NAS & FLC to UT optical ICD . ... Printable View of http://www.mrao.cam.ac.uk/projects/OAS/pmwiki/pmwiki.php/MROIFastTipTilt/DocMan) ...

... The extension LEDTEMPLATE of the OM CCF component PixToPixSens contains the normalized inverse illumination amplitude of each detector position. The array has a size of 2048x2048 elements. Bright areas in the internal flatfield data have assigned a value less than 1.0 and faint areas have a value of larger than 1.0. ... The function accesses the CCF LEDTEMPLATE map and returns an image with the requested size and resolution at the requested detector position. ...

... See Environment File. ... An SM expression is something that can appear on the right hand side of a SET command. ... A filecap file is a database used to describe the byte-by-byte format of binary files, to allow SM to read them (using the IMAGE command). ... The word list is used in a few places in the manual in the specific sense defined by the YACC grammar in `control.y' . ... Their peculiarities are described by a termcap file, allowing SM's command editor to run on (almost) any terminal. ...

... 2004: . ... An increase in star brightness is followed by a decrease in asphericity and wind velocity to the point where stationary and even accreting fraction of the wind appears in extremely bright objects together with a flowing out fraction. ... Based on an analysis of observations obtained with BTA and on the published data it was found that degree of abnormality of energy distribution in continuum of magnetic chemically peculiar stars increases with an increase of their rotation period. ...