... The Southern Cross ( Crux ) itself is at the right of the 20 degree wide field of view, topped by bright, yellowish star Gamma Crucis. A line from Gamma Crucis through the blue star at the bottom of the cross, Alpha Crucis, points toward the south celestial pole. Against faint Milky Way starlight, the dark expanse of the Coal Sack Nebula lies just left of the cross, while farther left along the Milky Way are the bright stars Hadar and Rigil Kentaurus , also known as Beta and Alpha Centauri . ...

... 2014 September 5 . A Sagittarius Starscape . ... Explanation: This rich starscape spans nearly 7 degrees on the sky, toward the Sagittarius spiral arm and the center of our Milky Way galaxy. ... With wingspans of 100 light-years or so, they shine with the telltale reddish glow of hydrogen atoms from over 5,000 light-years away. Colorful open star cluster M25 near the upper left edge of the scene is closer, a mere 2,000 light-years distant and about 20 light-years across. ... About APOD | ...

Astronotes Armagh Planetarium's Stellar Blog! ... Milky Way . Stars . ... This dramatic image depicts Omega Centauri, one of 200 or so globular clusters orbiting our Milky Way galaxy. ... Swarms of tightly packed stars, numbering in the thousands to low millions, globular clusters are cosmic fossils, relics of the early times of our galaxy. Omega Centauri may actually be the core of a smaller galaxy ripped apart and assimilated by our own Milky Way in the distant past. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

... SEARCH ASP SITE: Match ALL words Match ANY word . ... Lapping up the Milky Way . ... The Milky Way is an average-sized spiral galaxy, one of about 100 billion islands of stars in the universe. ... Thomas Wright in 1750 and Immanuel Kant in 1755 suggested that the band of light we see is a flattened disc of stars. ... This really depends on your location and sky conditions, but generally you'll see the Milky Way stretched as a band between the northeastern and southwestern horizons. ...

... STScI-PRC99-30 HUBBLE SPIES GIANT STAR CLUSTERS NEAR GALACTIC CENTER Penetrating 25,000 light-years of obscuring dust and myriad stars, NASA’s Hubble Space Telescope has provided the clearest view yet of a pair of the largest young clusters of stars inside our Milky Way galaxy, located less than 100 light-years from the very center of the Galaxy. ... But in the brief time they are around, they shine more brightly than any other star cluster in the Galaxy. ...

T he Siding Spring Survey (SSS) is a Near-Earth Object search program that utilises the 0.5-m Uppsala Schmidt Telescope at Siding Spring Observatory, N.S.W., Australia. ... The mission of the Siding Spring Survey is to contribute to the inventory of near-earth objects (NEOs), or more specifically, the potentially hazardous asteroids (PHAs) and comets (PHOs) that may pose a threat of impact and thus harm to civilization. ... Based on the CSS Mission page . ... Siding Spring Survey Main Page . ...

I was wondering what conditions should be met to have the "darkest" sky .. ... Upon the above publication of the Southern Galactic hemisphere, TunГ Tezel started seeking opportunities to create the Northern counterpart image. ... So, the initial quest of having the darkest possible sky have delivered us these two all-sky images of the two galactic hemispheres as seen from Planet Earth. Zoomable and 'full-screenable' fisheye view of the "darkest sky" Southern Galactic Hemisphere image. ...

... Embedded within this view are 2,753 star clusters. The view is 61,600 light-years across and contains images of 117 million stars in the galaxy's disk. Bottom-Left] An enlargement of the boxed field in the top image reveals myriad stars and numerous open star clusters as bright blue knots. Hubble's bird's-eye view of M31 allowed astronomers to conduct a larger-than-ever sampling of star clusters that are all at the same distance from Earth, 2.5 million light-years. ...

... Asteroid . ... In case you didn't hear about it, which you probably didn't: On Jan. 7, an asteroid 1,000 feet across -- nearly three times the current diameter of Marlon Brando -- barely missed the Earth, which is most likely your planet of residence. ... What if this asteroid had hit the Earth? ... As it happens, the American Astronomical Society was holding a conference in Washington AT THE VERY SAME TIME as the asteroid nearly hit the Earth. ...

... Bad Astronomy . Misconceptions . ... Bad Astronomy : "We're light years more advanced than our competition!" ... Even the closest astronomical object, the Moon, is 400,000 kilometers away! ... A beam of light will travel 9,500,000,000,000 kilometers in one year. This distance is defined as a light year ; the distance light travels in a year. ... This is another example of Bad Astronomy; like a light year, a parsec is a unit of distance, not time (to be specific, it equals 3.26 light years) . ...

Our publications in 2005 year S.A. Pustilnik (SAO), A.Y. Kniazev (ESO, SAO), A.G. Pramskij (SAO) . Astronomy and Astrophysics, Volume 443, Issue 1, November III 2005, pp.91-102 (11/2005) . ... Kniazev, Alexei Y.; Grebel, Eva K.; Pustilnik, Simon A.; Pramskij, A.G.; Zucker, D.B. The Astronomical Journal, Volume 130, Issue 4, pp. ... 10/2005) . Pustilnik, S. A. Astron. ... Kniazev, A.Y.; Pustilnik, S.A.; Grebel, E.K.; Lee, H.; Pramskij, A.G. VizieR On-line Data Catalog: J/ApJS/153/429. ...

... Primary Mirror after being stripped and recoated in 3-layer protected silver (NiCr-Ag-NiCr) on 12 September 2009. image: CIMG7901.jpg . ... Primary Mirror held by (yellow) handling tool being lifted off transport container (note the tennis balls it rested on), to be put on wash cart during unpacking at VISTA on 29 March 2008. image: P1060207.jpg (taken 29/03/08) . ... VISTA Mirror Blank: Shape of 4m primary mirror blank being tested at Schott Glas in Germany. image: M1_shape_checking-300dpi.jpg . ...

The near-IR data from 2MASS (Two Micron All Sky Survey) and DENIS (Deep Near-Infrared Southern Sky Survey) are ideally suited for studies of the structure of the LMC, because of the large statistics and insensitivity to dust absorption. ... Wide-angle view of the Large and the Small Magellanic Cloud (SMC) on the sky. ... Another wide-angle view of the LMC (bottom left) and the SMC (top left) on the sky, with part of the luminous band of the Milky Way visible as well (right). ...

NMW survey overview . Access image archive . ... The New Milky Way survey aims to detect bright (V<13.5) optical transients near the Galactic plane using an automated wide-field (8x6 deg.) system capable of surveying the whole Milky Way area visible from the observing site in one night. ... All images obtained during the transient search survey are available online (please use the image archive access form ). ... Images per field: . ... Images per night: . ... Milky Way imaging time: . ...

... Neptune is smaller in diameter but larger in mass than Uranus . ... N eptune has been visited by only one spacecraft, Voyager 2 on Aug 25 1989. ... A t the time of the Voyager encounter, Neptune's most prominent feature was the Great Dark Spot (left) in the southern hemisphere. ... Neptune's winds blew the Great Dark Spot westward at 300 meters/second (700 mph). ... L ike Uranus and Jupiter, Neptune's rings are very dark but their composition is unknown. ... Neptune's Ring System . ... Uranus .. ...

Amy Kimball . Publications . Radio Catalog . ... High Radio Frequency Sample of Bright Planetary Nebulae in the Southern Hemisphere Detected in the AT20G Survey (2015) MNRAS , 451, 3228 . ... Active Galactic Nucleus and Starburst Radio Emission from Optically Selected Quasi-Stellar Objects (2013) ApJ , 768, 37 . ... Kimball et al. ... A Closer View of the Radio-FIR Correlation: Disentangling the Contributions of Star Formation and Active Galactic Nucleus Activity (2010) ApJ , 24, 779 . ...

... Our Sun is part of a huge wheel-shaped collection of stars. ... Astronomers have long suspected it was a very massive black hole, and that every galaxy had such a central mass, created early in the history of the universe. ... 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. The velocity acquired in falling towards the black hole also helps it escape. ...

... Hikers: Ben, Dan, Dakota, Connor, Marisol, myself, Richard, Alfredo, Ting-Hui, Jeroen, and Simon . Left to right: myself, Ting-Hui, and Jeroen . ... Hikers: Ben, Dan, Dakota, Marisol, Nobuko, myself, Richard, Andrew, Giampiero, Wayne, Alfredo, Ting-Hui, Jeroen, Mike . Left to right: Ting-Hui, Mike, Richard, Nobuko, Ben, Giampiero, Andrew, Jeroen, myself, Wayne, Dan, and Dakota . ... Hikers: Ben, Marisol, myself, Richard, Giampiero, Wayne, Ting-Hui, Brenda, Jeroen, Simon, and Steph . ...

... Circumstellar disc of beta Pictoris: constraints on grain properties from polarization. To appear in the Astronomy & Astrophysics . abs , src , ps ] . ... Dust influx to Titan from Hyperion . ... abs ] . ... Characteristics of bulges and disks in interacting galaxies . ... Dust grains around Herbig Ae/Be stars: porous, cometary-like grains? ... To appear in the Astronomy & Astrophysics Supplement . ... Finally, Links may lead you to more options (e.g. via the LANL preprint system). ...