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Today's APOD | ... Editor's choices for the most educational Astronomy Pictures of the Day about Comet Hale-Bopp: . ... Comet Hale-Bopp 's blue ion tail was created when fast moving particles from the solar wind struck expelled ions from the comet's nucleus . ... APOD: 2005 May 22 - The Dust and Ion Tails of Comet Hale-Bopp . ... Visible above are the two tails shed by Comet Hale-Bopp . ... Explanation: Comet Hale-Bopp 's 1997 encounter with the inner Solar System allowed many breath-taking pictures . ...

... Here Comet Hale-Bopp was photographed above Val Parola Pass in the Dolomite mountains surrounding Cortina d'Ampezzo , Italy . Comet Hale-Bopp 's blue ion tail was created when fast moving particles from the solar wind struck expelled ions from the comet's nucleus . ... Publications with keywords: comet nucleus - Comet Hale-Bopp . Publications with words: comet nucleus - Comet Hale-Bopp . ... Comet Hale Bopp Over the Superstition Mountains . ... The Dust and Ion Tales of Comet Hale-Bopp . ...

... ESO is building what will be the World's largest optical telescope array, The Very Large Telescope (VLT). The VLT Project organisation is responsible for the design and construction of the Unit Telescopes, including enclosures, optics, adapter-rotators and coating unit. ... Unit Telescopes Overview - This page is outdated, an update is in process. ... Secondary mirror (M2 Unit) - This page is outdated, an update is in process. ... Coating Unit - This page is outdated, an update is in process. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Saturn as you haven't seen it (Image credit: NASA/ESA) . This false colour image from the Hubble Space Telescope not only shows Saturn in an unfamiliar light, but displays some of the giant planet?s features. ... Viewing Saturn at this time not only allows us to see the famous rings almost edge on but also to observe both polar regions at once. There we see Saturn?s aurorae, analogous to Earth?s Northern lights and Southern Lights. ...

... Comet Animation . ... Comet structures are diverse and very dynamic, but they all develop a surrounding cloud of diffuse material, called a coma, that usually grows in size and brightness as the comet approaches the Sun. ... As comets approach the Sun they develop enormous tails of luminous material that extend for millions of kilometers from the head, away from the Sun. ... The evaporated molecules boil off and carry small solid particles with them, forming the comet's coma of gas and dust. ...

Astroimager John Chumack from Dayton, Ohio, took this image of Comet ISON (C/2012 S1) on October 18, while it was near reddish Mars and blue-white Regulus (Alpha Leonis). ... He set the camera's speed to ISO 400, placed it on a tracking mount, and, at 6:27 a.m., started a 366-second exposure. He reported, "ISON had cleared the trees around 6 a.m., but dawn started to flood the image with light, not to mention the city lights over D.C. and strong light from a nearly Full Moon. ... John Chumack ...

... Bad Astronomy . Misconceptions . ... Bad Astronomy : The sky is blue because it reflects light from the oceans. Good astronomy : The sky is blue because it is scattering blue light from the sun. ... So everywhere you look you see blue photons, except directly from the Sun, where you'll see all colors. ... The sky does not look blue near the horizon because more yellow photons (and even orange ones right at sunset) are coming from that direction as they get scattered away from the Sun. ...

... June 28, 1998 . Comet Hale-Bopp Over Val Parola Pass . ... Explanation: In 1997, Comet Hale-Bopp became much brighter than any surrounding stars. ... Here Comet Hale-Bopp was photographed last March above Val Parola Pass in the Dolomite mountains surrounding Cortina d'Ampezzo , Italy. Comet Hale-Bopp 's blue ion tail was created when fast moving particles from the solar wind strike ions expelled from the comet's nucleus. ... About APOD > . ...

Classroom Activity: Making a Rainbow . ... When white light from the Sun or a light bulb passes through a prism, the light splits into its component wavelengths. ... Red, blue, green colored filters - if possible, cut 1x4-inch pieces of the filters for each student . ... Many students have the misconception that filters somehow dye the light a certain color. ... Younger students can draw the rainbow and make up a mnemonic for remembering the order of the colors (such as, ROY G. BIV). ...

... Набор Pasabahce Workshop "Light Blue" состоит из трех стаканов, выполненных из прочного натрий-кальций-силикатного стекла. ... Набор предназначен для подачи воды, сока и других напитков. ... Благодаря такому набору пить напитки будет еще вкуснее. Набор стаканов Pasabahce Workshop "Light Blue" прекрасно оформит праздничный стол и создаст приятную атмосферу за романтическим ужином. Такой набор также станет хорошим подарком к любому случаю. ...

... Conjunction Over Armagh . ... Comet and Pleiades . ... Pleiades . ... Antares Region . Helix and Cat's Eye Nebulae . Orion Nebula . Lagoon and Eagle Nebulae . Crab Nebula . ... Our Galaxy Core . Andromeda Galaxy . Wide-field and Zoomed-in Galaxies . Interacting Typhoons and Galaxies . Spiral Galaxy M106 . Sombrero Galaxy . Whirlpool Galaxy . Colliding Galaxies . ... й Miruna Popescu, Armagh Observatory ...

... We have measured this "redshift" for the pink black holes, and allowed for it in our calculations. ... We see this effect in the emission from gas around these pink black holes, but it is far too small an effect to account for the pinkness. Thus the swirling motions of gas around or into the black holes cannot produc the colour. ... At first we thought that these things were normal blue black holes hidden behind clouds of interstellar dust, that absorbed the blue light and made them appear pink. ...

... This is a false color image of HR 4796A composed of visible and near-IR light (blue=STIS, green=1.71 micron, red=2.22 micron). It's red color is caused by dust grains that scatter light poorly in the visible and very efficiently in the near-IR. This images shows the debris disk around HD 61005, and a model of debris disk dust grains being blown by and interstellar wind. This work was a Goddard web feature (look there for a cool movie showing one of the models). ...

... The ancient chronical said about the colour rings around the Sun and the Moon, about three suns in the sky, light columns, bright lightning, different "comets" rushing to the Earth, moving among the stars or round the Earth with the sky. All these occurrences may be divided into three categories: one that occur in the near or far space, processes going on in the Earth atmosphere under the influence of cosmic factors and at last the occurrences connected with the Earth atmosphere. ... Rainbow . ...

In the 20 July 2000 issue of Nature, Wang, Kuzmich & Dogariu talk about faster than light transmission. ... When all of the waves are delayed, but the longer wavelengths [red] are delayed more and the shorter wavelengths [blue] are delayed less, then the overall pulse appears to be advanced in time! ... Normal dispersion in glass delays the blue light more than the red light, while in anomalous dispersion the red light is delayed more than the blue. ... Tutorial: Part 1 | Part 2 | ...

... Her X­1 is one the first X­ray binary pulsar discovered by the eminent UHURU satellite in 1972 (Tananbaum et al. 1972, Giacconi et al. 1973) and since then remains one of the most studied accretion­driven X­ray stellar bi­ naries. ... 1972). The amplitude of the reflection effect strongly increases in ultraviolet and according to many optical UBV­photometrical data is \Deltam V = 1:45; \Deltam B = 1:6; \Deltam U = 2:55. ... 1982), HEAO­1 (Gorecki et al. ... 1984, Ohashi et al. ...

... Astronomy news . ... NASA's Spitzer Images Out-of-This-World Galaxy . ... It is spiral-shaped like our Milky Way, with long, spindly arms of stars. The "eye" at the center of the galaxy is actually a monstrous black hole surrounded by a ring of stars. In this color-coded infrared view from Spitzer, the area around the invisible black hole is blue and the ring of stars, white. ... The ring around the black hole is bursting with new star formation. ...

Phases of the Moon Phases of the Moon are not caused by the Earth's shadow. They are due to a change in our viewing perspective as the Moon orbits around us as it is lit by the Sun. ... The Earth spins in the light, so that the entire Earth gets to be lit at some point each day. Even though the Moon is always half-lit like the Earth is, sometimes we on the Earth see only a tiny bit lit, other times completely lit, depending on where the Moon is in its orbit around the Earth. ... Look at Day 7. ...

Astronomy Terms - To Help You Study The Universe . Articles | ... Learning about the universe, or the study of astronomy, can be fun for the individual or for the whole family. ... Learning a few simple terms will help you with this fascinating study. ... You will use a telescope or binoculars for your observation of the sky at night. ... Celestial Terms . ... Meteor or a shooting star – the light caused when a meteoroid burns up in Earth's . ... www.astronomy.net . About Astronomy Net | ...