... Particularly interesting sources include a bright open cluster of stars and several energetic star-forming regions. ... Amazingly detailed, this false-color x-ray image is centered on the galaxy Cygnus A. Recorded by the orbiting Chandra Observatory, Cygnus A is seen here as a spectacular high energy x-ray source. ... The big beautiful spiral galaxy is located just 10 million light-years away, behind a veil of foreground stars in the high and far-off constellation of Cepheus. ...

... 2000 October 31 . The Perseus Cluster's X-Ray Skull . ... Explanation: This haunting image from the orbiting Chandra Observatory reveals the Perseus Cluster of Galaxies in x-rays , photons with a thousand or more times the energy of visible light. ... From this angle, voids and bright knots in the x-ray hot gas cloud lend it a very suggestive appearance . ... Over a hundred thousand light-years across, the Perseus Cluster's x-ray skull is a bit larger than skulls you may see tonight . ...

... October 18, 1999 . NGC 3603: An Active Star Cluster . ... Explanation: NGC 3603 is home to a massive star cluster, thick dust pillars, and a star about to explode . The central open cluster contains about 2000 bright stars, each of which is much brighter and more massive than our Sun . ... These stars are less massive than our Sun, demonstrating that great numbers of low-mass stars also form in active starburst regions . ... About APOD > . ...

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 . ...

... Abstract . ... An Efficient ACS Coronagraphic Survey for Debris Disks around Nearby Stars . ... The Dynamic State of the Dwarf Galaxy Rich Canes Venatici I Region . ... High-resolution HST image of the face-on debris disk in the G2 dwarf, HD 107146 . ... Simulations of a nearby dwarf galaxy, a nearby giant galaxy and a distant giant galaxy; note that the last is similar in angular size to the dwarf, but has a much smoother brightness distribution (simulations from Ned Wright's ABC of distances . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Our Galaxy . ... Other Galaxies . ... Space Flight . ... Posted on October 4, 2010 | 1 Comment Gorgeous! ... Continue Reading.. ... Posted on September 24, 2010 | ... 1 Comment That amazing instrument, the Hubble Space Telescope (HST), has just celebrated its twentieth anniversary since it was placed in orbit. ... No Comments Dark matter and its part in the evolution of the Universe is revealed by new data collected by the Hubble Space Telescope. ...

XMM-Newton observation of the core of the massive cluster Cyg OB2 located in the constellation Cygnus, 4,700 light-years from Earth. The cluster contains massive O-type stars that shine brightly in X-rays. Cyg OB2 #9 is seen as the bright star just below the central star, and in 2008 was determined to be a binary system. ... Hundreds of lower mass stars also fill the field of view, which spans nearly 22 x 16 arcminutes. ...

... The ball of stars at the centre of this photograph is unbelievably old. ... This group of stars, called a globular cluster, is actually 10 billion years old that's almost as old as the universe itself! Globular clusters contain tens of thousands of ancient stars that all formed around the same time, from the same material. But strangely, these clusters sometimes contain stars that look suspiciously young, raising the question: are these clusters really the ancient relics that we believe? ...

... The Pleiades star cluster, also known as the Seven Sisters and Messier 45, is a conspicuous object in the night sky with a prominent place in ancient mythology . ... The stars in the Pleiades are thought to have formed together around 100 million years ago, making them 1/50th the age of our sun, and they lie some 130 parsecs (425 light years ) away. ... Data for these stars are listed in a table below. ... Yes . ... WEBDA Pleiades cluster data . ... M45: The Pleiades Star Cluster (2007 November 18) ...

... The R , I photometric observations of SBS 0335-052W were obtained occasionally during the study of SBS 0335-052 with the 3.5m telescope in Calar Alto on 1991 October 6. ... Aperture photometry was performed on the standard star observations using MAGNITUDE/CIRCLE task with the same aperture for all stars. ... For photometry of extended objects, we used the package SURFPHOT as well as dedicated software for adaptive filtering developed at the Astrophysical Institute of Potsdam (Lorenz et al. ...

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. ...

... This gives us another handle on how distant the stars are. ... Stars differ not only in distance, but also in apparent brightness. ... Ranking stars by brightness . ... The brightness of the star decreases as the square of the distance. ... At what distance would a 100-watt light bulb have the same brightness as the brighter stars? ... So if the distance of the 100-watt light bulb was 5 kilometers, the distance of the brighter stars would be 10,000,000,000,000 kilometers, or about a light-year. ...

Four spacecraft: INTERBALL Tail probe (IB_TAIL), CLUSTER II (ESA/NASA), POLAR(NASA/ISAS), GEOTAIL (NASA) are considered. ... four spacecraft . ... INTERBALL . ... IB_TAIL) . ... NASA) . GEOTAIL . NASA, ISAS) . The four spacecraft . ... Modified 28 August 2000 . ... INTERBALL mission | ...

Collins School Star Party - Oct. 5, 1999 Presented by the North Shore Amateur Astronomy Club (NSAAC) For more information: NSAAC: http://www.star.net/people/~nsaac 1.0 Using a telescope Close one eye (use your hand if it's easier) and look straight down into the eyepiece. ... Massive stars use up their fuel much faster - in some cases less than 100 million years. ... Jupiter _____. ... With the chart at left and using the brightest stars as a guide, see if you can find Uranus with binoculars. ...

... Armagh Observatory received many telephone and internet reports from members of the public regarding sightings of a bright meteor or fireball which crossed over Northern Ireland in the early morning of Sunday, 10th October. ... Account: I was driving on the main Armagh/Portadown Road travelling towards Richhill when the sky in front of me was lit up by a couple of very bright flashes of light which were followed by a trail of white light. ... The trail faded over approximately 20 seconds. ...

... ST-ECF . ABOUT ST-ECF . ... After an initial agreement between NASA and ESA in 1977 and following Hubble's more than twenty years in space and 110,000 orbits of the Earth, the aim of this conference is to celebrate the huge contributions made by the Hubble observatory to our knowledge and understanding of the Universe. ... David Southwood . ... Robert O'Connell . ... Robert O'Dell . ... Questions and information: HST3@stecf.org . ... Maintained by HST 3 Webmaster <HST3@stecf.org> . ...

... In typical nightly use, the wide field and planetary telescope and cameras record images of favorably placed objects in the sky, including constellations, bright variable stars, nebulae through narrow-band filters, comets, the Moon, and planets. ... Shared Skies telescopes are available for use by students at the University of Louisville and the University of Southern Queensland, and by teachers and students in middle and high schools mentored by faculty at the universities. ...

... V838 Mon is a member of a new class of eruptive variables which appear as a peculiar novae having late K-M type spectra in their outburst. Before its outburst, it was a wide binary system of B3V type stars. ... The B3V companion was seen in the outburst in the UV spectrum taken with HST (Rauch et al., ... In the latest spectra, the light of B3V companion was predominating in the short-wave photometric bands. ... CCD blue frames of V838 Mon before the eclipse (left) and in the eclipse (right). ...

... S-6.The X-ray Sun . S-7.The Sun's Energy . S-7A. The Black Hole at . our Galactic Center . ... Our Sun is part of a huge wheel-shaped collection of stars. ... However, unless that object happens to be headed directly at the black hole (a relatively small target) it will just swing around and fly away again, like a comet making a pass at the Sun. ... Far from being a voracious devourer of stars and of interstellar gas, "our own" black hole is rather benign. ... What holds galaxies together? ...

Finding Himalia, The Fifth Brightest Moon Of Jupiter . Articles | ... Himalia is the only moon other than the Galilean moons of Jupiter that is visible in an amateur size telescope. ... I normally use “The Sky” from Software Bisque for planning my observing sessions and in helping me find objects, but it only has the Galilean moons for Jupiter so I used Red Shift (version 3 at the time) which I also had on my computer. ... www.astronomy.net . ... dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...