... Bad Astronomy . ... Bitesize Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... How many times have you heard the phrases "escape from Earth's gravity" and "zero gravity"? ... Gravity goes on forever, and there is no place in the Universe where there isn't some gravitational force. Anything with mass has gravity. ... So there really is no place in the Universe where there is zero gravity, except in the annals of Bad Astronomy. 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Misconceptions
• Phil Plait's Bad Astronomy: Mad Science
• Phil Plait's Bad Astronomy: Misconceptions: Does the Venus Transit Cause...

... Jupiter is our Solar System?s very own superhero. The giant planet is two and a half times more massive than all the rest of the planets in our Solar System combined. And with great mass, comes great gravity. With the power of super-strong gravity, Jupiter plays a heroic role in our Solar System, protecting life on Earth. ... Unfortunately, we have found lots of solar systems with massive planets that lie close to their star, but not so many that lie far away, like Jupiter. ...

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• http://www.eso.org/public/news/eso1319/kids/
• http://www.eso.org/public/news/eso1426/kids/
• Panning across the giant elliptical galaxy Centaurus A (NGC 5128) and its

... Black holes are found at the centres of galaxies which are similar in size to our own Milky Way Galaxy or larger. When black holes collide and merge they form supermassive black holes which are events among the most powerful in the universe. ... 55, No. 1, pages 1-5, 'Observational Effects of Strong Gravity in Vicinity of Supermassive Black Holes' . ... International Year of Astronomy, Ireland National Node . ...

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• Terry Mosely's Bulletins
• St Patrick's Parades across Ireland - the largest IYA social event on the
• Stealth Comets

Eros From Orbit . ... Credit Copyright: NEAR Project , JHU APL , NASA Explanation: On February 14th, the NEAR spacecraft became the first artificial moon of an asteroid . Captured by the gentle gravity of a 20 mile long slipper-shaped mountain of rock, NEAR recorded this premier image while orbiting asteroid 433 Eros at a distance of about 200 miles. The image shows features as small as 100 feet across in a view dominated by a 3 mile wide crater near Eros' narrow waist. ...

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• Eros From Orbit
• XWare > APOD

The ultimate force in the universe: Some thoughts about gravity. ... Gravity through the ages Aristotle: Earth, water, fire, air. Earth and water fall `down' to the center of the cosmos (geocentric or earth centered universe). The more earth or water in the object, the faster it is attracted to the center. ... Determines the fate of the universe (expand forever, or contract back in a `"big crunch"). ... Determines the fate of stars when they die (white dwarfs, neutron star, or black hole). ...

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From Herschel's catalog, the first accurate stellar parallax measurement of 0.32 seconds of arc for the star 61 Cygni was published by the F.W. Bessel in 1838. ... This distance is equivalent to 3.26 light years. ... The Universe was now a large place and the intrinsic energy output of the stars had to be huge in order that their light could reach us. ... An Orbit in Curved Space This is a prediction made by General Relativity and confirmed by direct observation of Mercury. ...

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... 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. ...

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• The Motion of Magnetically Trapped Particles -- History
• Electrons, Ions and Plasma
• Distance to the Horizon

... In the 1800s it was already evident that the Earth's magnetic field was involved: auroral rays seemed to follow the Earth's magnetic field lines, and the frequency with which aurora was observed depended on the distance from the magnetic pole, not from the geographic one. ... That is the beginning of the ionosphere , a layer with enough free electrons (and ions) to play an important role in radio communications. ... The simplest atom is the one of hydrogen, with just one electron. ...

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• The Motion of Magnetically Trapped Particles -- History
• Distance to the Horizon
• Newton's theory of "Universal Gravitation"

Hubble Observations Shed New Light on Jupiter Collision . Was it a comet or an asteroid? ... Their initial findings, combined with results from other space-borne and ground-based telescopes, shed new light on Jupiter's atmospheric winds, its immense magnetic field, the mysterious dark debris from the impacts, and the composition of the doomed comet itself. ... Hubble's ultraviolet observations show the motion of very fine impact debris particles now suspended high in Jupiter's atmosphere. ...

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• Educator's Guide to The Inverse Square Law
• Virgo Group - Gravitational Wave basics
• Dust evolution across the CO snowline in a protoplanetary disk

. A snapshot of the electric field strength across the UK during the geomagnetic storm of March 17, 2013. The blue areas are where the field was most strongly negative and the red areas are where it was most strongly positive. This electric field causes currents to flow in any conducting structures, including the power grid. // British Geological Survey б©NERC

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• With the Moon's terminator moving almost 10 mph (16 km/h) across its equator,

... 2003 July 23 . GRACE Maps the Gravity of Earth . Credit: GeoForschungsZentrum Potsdam , CSR U. Texas , JPL , NASA . ... To help better understand the Earth's surface , slight distance changes between a pair of identically orbiting satellites named GRACE have been used to create the best ever map of Earth's gravitational field . ... Maps like this also help calibrate changes in the Earth's surface including variable ocean currents and the melting of glaciers . ... About APOD | ...

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• APOD: 2008 March 28 - Across the Universe
• APOD: 2014 July 5 - M106 Across the Spectrum
• APOD: 2015 April 30 - Across the Sun

We estimate the conversion factor relating CO emission to H2 mass, ЮБCO, in five Local Group galaxies that span approximately an order of magnitude in metallicityт?? ... We model the dust mass along the line of sight from infrared (IR) emission and then solve for the ЮБCO that best allows a single gas-to-dust ratio (ЮДGDR) to describe each system. ... These results are consistent with the conversion factor becoming a strong function of metallicity around 12 + log (O/H) ~ 8.4-8.2. ...

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• Gauging the impact of executing science program across different COS/FUV
• STScI Hosts "Habitable Worlds Across Time and Space" Symposium April 28-May 1
• Habitable Worlds Across Time and Space

Science Opportunities and Future Radio Telescopes: II. ... How is the Dark Matter halo distributed? ... Measure 3-D locations and motions; Model dark matter halos N-body integrations yield history/ future Dark Matter in Local Group full DM halos 50% DM halo N-body calculations: sensitive to dark matter halos Science with Current and Future National Radio Telescopes Constraints on radio observations Science with Current and Future Radio ...

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• http://www.naic.edu/vscience/schedule/tpfiles/BuschtagR2295tp.pdf
• http://www.naic.edu/vscience/schedule/tpfiles/BuschtagR2295tp.ps
• Cosmology / Relativity / Gravity Wave Astronomy

Next: Other Galaxies with HI Up: Galaxies with Broad HI Previous: NGC 7582 . Table 4 lists a few strongly interacting or merging galaxies which also show broad H I absorption lines. ... Table: Strongly interacting pairs of spirals . ... But in these galaxies the cold gas which feeds the starburst is driven inwards by strong tidal interaction or merging between galaxies (see e.g., Rieke et al. 1985), whereas in the nearby galaxies, bars and/or weak galaxy interactions may be responsible. ...

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• Research - Compact high-velocity clouds around the Milky Way
• Powerful AGN and Their Host Galaxies Across Cosmic Time
• ATNF Colloquium

As the Universe expands, gravity pulls on the Universe, and slows the expansion down over time. As we look to great distances, we are looking back in time. If we can measure how fast the Universe is expanding in the past, and compare it to how fast it is expanding now, we can see the total gravitational effect of all matter in the Universe. Here we plot the distance between two galaxies as a function of time. ... Universes with lots of material . ...

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• Untitled1
• Orbits

... Today this year's largest group of sunspots will cross the Sun's central meridian. ... The next day, the number of spots in the group reached five, and the day after, on June 2nd, it was possible to count thirteen sunspots on solar disk, which had been clear prior to this. ... This year's two most powerful active areas, which passed across the solar disk at the beginning of May, 2009, are set to appear in the Sun's eastern sector in two days, on June 6th. ...

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• The Russian TESIS Observatory will observe two solar eclipses from space
• The culmination of the solar eclipse coincided with the strongest magnetic

... Planets . ... Earth Satellites . ... The newly discovered ?mega-Earth? ... Its sibling, the lava world Kepler-10b, is in the background (the two planets? proximity is grossly exaggerated) .€а Kepler-10c has a diameter of about 29 000 km, 2.3 times as large as Earth, and weighs 17 times as much. ... The first mega-earth to be discovered is Kepler-10c which orbits a star lying about 560 light years from the Sun in the constellation Draco. ... Astronomers Find a New Type of Planet: The ?Mega-Earth? ...

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• Astronotes | Armagh Planetarium's astronomy news from across the Universe -
• Astronotes | Armagh Planetarium's astronomy news from across the Universe
• Vesta: Asteroid seen by Dawn spacecraft | Astronotes

... Home Observing Solar Bridge Across New York Harbor . ... Clear Sky Chart . This Month's Sky . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... Amateur Astronomers Medal . ... Get on board with the Amateurs Astronomers Association, Sunday, September 20th, 2015 . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

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Blackholes Forum Message . Forums: . ... Discussion Forums | Blackholes I | Post . ... Gravity Always Attracts . Forum List | ... Post Message | ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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• Black Holes And RedShift - an Astronomy Net Blackholes Forum Message
• Black Holes Easy Reader. - an Astronomy Net Blackholes2 Forum Message
• New Model: How Do The Sun And Moon Appear To Move Across The Sky - an Astronomy

... CHORUS I hear you calling Marian Across the water, across the wave I hear you calling Marian Can you hear me calling you to Save me, save me, save me from the Grave.. ... Ich bin hier allien (I am here alone) Ich hore dich rufen Marian (I hear you calling Marian) Ohne diene hilfe verliere ich mich in diessem ort(Without your help I am lost in this place) CHORUS(repeat Marian til end) ...

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• http://crydee.sai.msu.ru/ftproot/pub/rec/music/lyrics/cs-uwp/d/doors/521
• http://crydee.sai.msu.ru/ftproot/pub/rec/music/lyrics/cs-uwp/b/baez.joan/asimbonanga
• Tuesday, 14 September. Across the Arno