... 2012 September 24 . NGC 2736: The Pencil Nebula . ... Explanation: This shock wave plows through space at over 500,000 kilometers per hour. ... Cataloged as NGC 2736 , its narrow appearance suggests its popular name, the Pencil Nebula . About 5 light-years long and a mere 800 light-years away, the Pencil Nebula is only a small part of the Vela supernova remnant . ... Follow APOD on: Facebook ( Daily ) ( Sky ) ( Spanish ) or Google Plus ( Daily ) ( River ) . ... About APOD | ...

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• APOD: 2009 January 8 - NGC 2736: The Pencil Nebula
• APOD: October 24, 1997 - Moving Echoes Around SN 1987A
• APOD: November 22, 1996 - Fliers Around the Blue Snowball Nebula

... Cataloged as NGC 2736 , its narrow appearance suggests its popular name, the Pencil Nebula . About 5 light-years long and a mere 800 light-years away, the Pencil Nebula is only a small part of the Vela supernova remnant . The Vela remnant itself is around 100 light-years in diameter and is the expanding debris cloud of a star that was seen to explode about 11,000 years ago. ... Publications with keywords: supernova remnant . Publications with words: supernova remnant . ...

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• Journal "Peremennye Zvezdy"
• Moving Echoes Around SN 1987A

... An international team of astronomers has discovered a new magnificent example of a planetary nebula showing fast moving jets. ... Finally, the envelope is ejected as a planetary nebula and the two stars are now orbiting around each other in a frenetic cosmic waltz. ... The paper, just accepted by Monthly Notices of the Royal Astronomical Society, is available on astro-ph (ETHOS 1: A high latitude planetary nebula with jets forged by a post common envelope binary central star, by B. Miszalski et al.)...

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Astronotes Armagh Planetarium's Stellar Blog! ... Solar System . ... Moon . ... Comets and Asteroids . ... What changed our view of Chariklo is the discovery of a ring system around it, the first such feature found around a Solar System body smaller than a gas giant planet. ... Almost certainly the rings were born when a collision with a smaller asteroid blasted millions of tonnes of debris off CharikloтАЩs surface. ... A ring system detected around the Centaur (10199) Chariklo (Braga-Rigas et al.) ...

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• Stargazing in June | Astronotes
• Why is this nebula so shocking pink? | Astronotes

. There are a range of easy to use commands that provide a great degree of flexibility in how you move around the contents of the file you are editing. Many of these commands can be combined with a numerical value to extend their functionality. Move the cursor along a line . Move the cursor between lines . Move between text blocks . Move over the file .

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• Moving around the screen
• Move around the screen
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... Главная . ... Новости . ... Проекты . Любителям астрономии . Проект ISON . ... Подробнее . ... Категория: Новости проекта ISON . ... Метки: Космический мусор ,љ Астероиды ,љ Гамма-всплески ,љ Любителям астрономии ,љ Кометы љ . ... Метки: Космический мусор ,љ Астероиды ,љ Любителям астрономии љ . ... Новости обсерваторий проекта] - Обсерватория Кубанского государственного университета от Иванов А - 09.04.2016 11:08:49 . ... 1999-2013 Copyright "Астрономия и Телескопостроение" . ...

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... 2001 January 23 . Spherical Planetary Nebula Abell 39 . ... Planetary nebula Abell 39 , now six light-years across, was once a sun-like star's outer atmosphere expelled thousands of years ago. The nearly perfect spherical nature of Abell 39 allows astronomers to accurately estimate how much relative material is actually absorbing and emitting light. ... Abell 39 lies about 7000 light years away, although several galaxies millions of light years away can be seen through and around the nebula. ...

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• APOD: 2000 January 11 - The Rosette Nebula in Hydrogen, Oxygen, and Sulfur
• APOD: February 5, 1996 - COBE Dipole: Speeding Through the Universe
• APOD: 2000 December 20 - Sgr A: Fast Stars Near the Galactic Center

... self-absorption - the absorption of light shining on an object by a process similar to that which produced the light originally; if a cloud emits less light than it absorbs from other clouds behind it, this net loss of light, termed self-absorption , causes the foreground cloud to appear darker than the background field (the term is from spectroscopy, where small absorption dips sometimes occur in larger emission lines, making the latter look as if it is absorbing part of itself) . ... HISA Main ...

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• td8 stops moving apr08
• td12_16jan08
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http://hubblesite.org/newscenter/archive/releases/1996/22/text/ Probing the mysterious heart of the Crab Nebula, the tattered remains of a stellar cataclysm witnessed more than 900 years ago, astronomers using NASA's Hubble Space Telescope have found that the Crab is even more dynamic than previously understood, based on a cosmic "movie" assembled from a series of Hubble observations. ... Because of this flickering, the neutron star is also called a "pulsar." ...

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Photon Scattering: Basic Principle of Photon Scattering . Audio Narration is available . No Scattering: Photon Source and Detector . ... For optical photons, scattering goes as wavelength to the -4 power. In the case of blue photons compared to red photons, this means that blue photons are about 10 times more likely to get scattered than red photons. ... Watch the blue photons scatter away from the detector . ... Interstellar dust make stars appear redder than they really are . ...

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• Moving Towards Life
• The Galaxy Gallery: Messier Objects

A full explanation of the motion of trapped particles would be too abstract and mathematical for this level, but some basic ideas may be described on an intuitive level. The magnetic force on a moving particle is always perpendicular to the motion, as well as to the magnetic field lines. That is why the basic pattern is motion in a circle, around a magnetic field line. ... The best-known periodic motion is the back-and-forth swing of a pendulum, say of a weight suspended by a string (drawing). ...

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• Discovery of the Solar System
• Frames of Reference: The Basics
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... Contact . ... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . Development of the 20 March 2015 partial solar eclipse as seen from Northern Ireland from first contact at 08:26 to eclipse maximum at around 09:30. ... Armagh Observatory reports that the largest partial solar eclipse visible from Northern Ireland since 1927, when 97 percent of the SunтАЩs disc was obscured, occurs between 08:26 and 10:38 on the morning of Friday 20 March 2015. ...

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• Spinning Star Formation
• Why this is interesting: reasons for which astronomers get very excited around
• Sakurai?s Object (V4334 Sagittarii)

EMBARGOED UNTIL: 9:20 AM CST, January 6, 1999 CONTACT: John Biretta Space Telecsope Science Institute, Baltimore, MD (Phone: (410) 338-4917; Internet: biretta@stsci.edu) HUBBLE DETECTS FASTER-THAN-LIGHT MOTION IN GALAXY M87 Astronomers reported today discovering clouds which appear to move many times faster than the speed of light, shooting out from the region of a black hole at the center of the M87 galaxy. ... It's an illusion created by the finite speed of light and rapid motion," Biretta said. ...

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• The Ever-changing Circumstellar Nebula around UW Centauri
• Local astronomers find gigantic halo around neighboring galaxy - By MEGHA
• Moving Target Observations in Two Gyro Mode

... Bad Astronomy . ... Mad Science . ... Site Info . ... Public Talks . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Who is this guy who calls himself "The Bad Astronomer?" ... First, yes, I am a real live astronomer (when people ask me what astronomers do, I tell them "They astronom !" ... These are emitted by powerful objects like black holes, exploding stars, and super-dense neutrons stars. ... Finally, am I really a bad astronomer? ... 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Misconceptions
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• Phil Plait's Bad Astronomy: SPOILER Review: Austin Powers: The Spy Who Shagged

... With the Moon's terminator moving almost 10 mph (16 km/h) across its equator, how long would it take for an observer using binoculars to notice a change in lunar features? ... The lunar terminator, the sunset/sunrise line that sweeps across the Moon s surface as the Moon orbits Earth, travels at a rate of 9.6 mph (15.4 km/h) along our satellite s equator. ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ...

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• Astronomers create movie of M87's jet | Astronomy.com
• Venus transit and lunar mirror help astronomers find worlds around other stars
• Hubble maps 3-D structure of ejected material around erupting star |

Turning the Camera Skyward . A reconfigured camera can take wide-field exposures of astronomical objects (constellations, the Milky Way, zodiacal light, moving artificial satellites, meteor showers, variable stars, etc.) to reveal much fainter objects and structures than seen by naked eye. ... This picture reveals objects more than 2.5 times fainter than can be seen by the naked eye, including not only stars but also the Orion nebula (M42), where new stars are being born. ...

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• ASP: Taking a Grand Virtual Voyage in the Milky Way
• ASP: Star Science in the Autumn Sky
• ASP: Introductory Astronomy Glossary

Astronomy suffers from the `Static Illusion' - because astronomical changes usually occur over intervals much longer than a human lifetime they appear static. This illusion affects our understanding of how astronomical objects work. ... Observations at the 1/10th arcsecond level with HST and near-infrared adaptive optics on ground based telescopes are beginning to create movies of `astronomy in motion'. ... Proto-star HH-30 expanding jet HST.. Young binary, XZ Tau, expanding `bubbles' HST.. ...

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• Apple Scrolling - Which Way is Up?
• Select a circle around the central point source

GTK+ 2.0 Tutorial . Prev . Next . ... The gint, gchar, etc. that you see are typedefs to int and char, respectively, that are part of the GLib system. ... A good example is "gint32" which will be typedef'd to a 32 bit integer for any given platform, whether it be the 64 bit alpha, or the 32 bit i386. ... You'll also notice GTK's ability to use GtkWidget when the function calls for a GtkObject. GTK is an object oriented design, and a widget is an object. ...

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• Moving objects
• Solar System Cosmology

... A discussion of retrograde motion of planets helps the students understand the logic underlying the ideas of both Ptolemy and Copernicus. ... This lesson plan supplements: "The Discovery of the Solar System," section #9c: on disk Ssolsys.htm , on the web . ... Learn about the system proposed by Copernicus, and the way it explained retrograde motion: all planets moved in circles around the Sun, but the ones closer to the Sun always moved faster. ... Did this predict correct planetary motions? ...

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• Frames of Reference: The Basics
• Estimating the Moon's Distance
• Lesson 23--Frames of Reference: The Basics

... Your main research interests concern neutral hydrogen. ... That means that there must be enormous quantities of gas lying around, waiting for the chance to collapse under its own weight into lumps and form stars and galaxies. If we could actually observe this gas, as it moves around and assembles itself into lumps, we would be directly observing the process of galaxy formation. ... Optical astronomers seem to think that they can observe galaxy formation by taking optical images. ... In galaxies. ...

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• The High-Z SN Search Description
• Pink Black Holes: Frequently Asked Questions
• C/2006 P1 (McNaught)