The Solar spots - are the dark formations on the Sun's disk. ... The greatest observed spot is 100 thousand kilomiters. The spots are the places of the magnetic fields' getting out to the solar atmosphere. ... That's why they look so dark . ... The Solar convection zone is the layer with the thickness of 150 - 200 thousand kilomiters, situated under the photosphere; the substance of this layer being in convectional movement transformes the energy from inside the Sun's to its surface. ...

Astronomy Picture of the Day . Orion Nebula in Surrounding Dust . ... Credit Copyright: Robert Fields Explanation: What surrounds a hotbed of star formation? In the case of the Orion Nebula -- dust. ... Over the next few million years much of Orion's dust will be slowly destroyed by the very stars now being formed, or dispersed into the Galaxy. ... 2013 2014 . ... Publications with keywords: Orion Nebula - dust . Publications with words: Orion Nebula - dust . ... Dust of the Orion Nebula . ...

Triton . Neptune I . ... Voyager 2 images showed active geyser-like eruptions spewing nitrogen gas and dark dust particles several kilometers into the atmosphere. ... Voyager 2 obtained this color image of Neptune's large satellite Triton during its close flyby on Aug. ... The polar frosts were sublimating because Triton's orbital and rotational motion causes the sun to shine directly on the polar cap for a period of several decades during Neptune's and Triton's long austral summer. ...

... 2008 July 23 . High Cliffs Surrounding Echus Chasma on Mars . ... Mars Express , DLR , ESA . Explanation: What created this great cliff on Mars? ... With a four-kilometer drop, this high cliff surrounding Echus Chasma , near an impressive impact crater, was carved by either water or lava . A leading hypothesis is that Echus Chasma, at 100-kilometers long and 10-kilometers wide, was once one of the largest water sources on Mars . ... About APOD | ...

... I t was long thought that Titan was the largest satellite in the solar system but recent observations have shown that Titan's atmosphere is so thick that its solid surface is slightly smaller than Ganymede's . ... R ecent observations with the Hubble Space Telescope show remarkable near infrared views of Titan's surface (right and top). ... T he observations by HST also indicate that Titan's rotation is in fact synchronous like most of Saturn's other moons. more images . ... Saturn .. ...

... Tonight's Sky . ... Photos . ... Sky this Month . ... Behemoth black hole found in an unlikely place . ... black holes . space flight . ... space physics . ... The Sky This Week: April 1 - 10 . ... Sky this Week . ... The Real Reality Show: Would aliens be anything like us? ... How is it that in space, despite the Sun's presence, the surroundings look black? Apollo photos show a black sky, even with strong sunlight on the surface. ... Get instant access to subscriber content on Astronomy.com! ...

What will happen when the fragments hit Jupiter? ... All the fragments will enter Jupiter's atmosphere at an angle of 42 degrees from the vertical and impact near a latitude of 44 degrees south, but on the back side of the planet as seen from Earth (about 10 degrees in longitude behind the edge of Jupiter, as seen from Earth). ... Any body moving through an atmosphere is slowed by atmospheric drag, by having to push the molecules of that atmosphere out of the way. ...

The coordinates, diameters, altitudes and morphological features of all the craters of Mars exceeding 10 km in diameter, totaling 19 308, are compiled. ... The catalogue is intended for use by investigators of Mars, students, in comparative planetology and in the selection of craters for naming. ... 1 one terrace . 2 many terraces . ... 6 many hills and one ridge . 7 one hill and many ridges . ... 1 one crater . 2 many craters . ... Sample craters of different morphological categories . ...

... White Dwarf Spectra . ... My conception of a white dwarf with a dusty disk. The dust must sublimate and will accrete onto the surface of the white dwarf, possibly through streamers of gas that follow the white dwarf's magnetic field lines. As in Saturn's rings, there might be streaks in the dust due to material that is darker than the surrounding dust, or perhaps caused by shadows of rocky bodies with sizes larger than the scale height of the disk. ...

... A significant amount of effort was devoted to the question of the properties and observability of meteors in the atmospheres of Venus and Mars. ... The work on meteors in the atmosphere of Venus complements earlier work by Christou (Planetary & Space Science, 47, 1475, 1999) which investigated the possibility of meteor showers on Mars. ... Figure 4: Comparison of Mutual Events Data obtained from Armagh Observatory (red dots) and Nyr?l? Observatory, Finland (green dots), on 15 March 2003. ...

... Gallery . ... The 9" Oddie refractor, 188?- ... The Oddie surrounded by snow . Sidebar Left . Sidebar Top . No Sidebar . Sidebar Bottom . ... Title: The Oddie surrounded by snow . Description: NOTE: All images are copyright and must not be reproduced or mirrored in any form without written permission. File name: Snow_Oddie.jpg . ... The Oddie surrounded by snow NOTE: All images are copyright and must not be reproduced or mirrored in any form without written permission. ...

Stellarium 0.12.3 . ... Classes . ... FileљStructure . ... Atmosphere Class Reference . ... More... #include < Atmosphere.hpp > . voidљ . computeColor (double JD, Vec3d _sunPos, Vec3d moonPos, float moonPhase, StelCore *core, float eclipseFac, float latitude=45.f, float altitude=200.f, float temperature=15.f, float relativeHumidity=40.f) . ... Get fade in/out duration in seconds. ... getFlagShow () const . ... getFadeIntensity (void) const . ... Definition at line 40 of file Atmosphere.hpp . ...

... Neutral hydrogen observations with the Effelsberg 100-m telescope have disclosed an HI bubble surrounding the WN6-7 star WR 149, located in the far side of the Perseus spiral arm. With a radius of 57 pc and an expansion velocity of about 10 km/s, this new bubble appears similar to those previously found around other Wolf-Rayet stars. ... ISM: bubbles -- stars: individual: WR 149 -- stars: Wolf-Rayet . ...

... A more detailed (but qualitative) discussion of heat flow in the atmosphere and related weather processes, including the roles of buoyancy, convection and humidity. ... Heat makes it expand, it becomes less dense than the surrounding air and buoyant, and it rises like a hot-air balloon (or like a drop of oil in a bottle of water). ... The important thing to remember when dealing with convective flows, is that the higher one is in the atmosphere, the lower are the pressure and density of the air. ...

. Album : asv-album :: Travels to distant places and countries :: 1997/08 Kyoto, Nara (Japan) :: 25/08 Kyoto Botanical Garden . Up . << Prev . Small waterfall, surrounded by bushes. Next >> . Album created by album tool a MarginalHack written by David Ljung on Tue Jun 23 14:46:27 2015 .

This section of the main exhibit depicts some of the tools and techniques used by scientists to study the earth's atmosphere and our surrounding universe. It includes an interactive model of the Arecibo radio telescope . ... light and color, the electromagnetic spectrum, and spectroscopy. The operation of the telescope, the optical laboratory and the HF facility . are also described in this section. photos by: tony acevedo 1997 ...

Deep Time: Earth's history and future By Colin Johnston, Armagh Planetarium Earth 4.54 billion years ago Forms in Sun's protoplanetary disc S un Elsewhere in Solar System Other planets form. ... Hot and airless Sun a subgiant, diameter 1.5 its current value, 2 6.4 billion years from no w ? ... Earth cools 20 million years later? ... Core temperature about 55 million°C, helium flash, followed by the Sun shrinking Sun is 10 times its current diameter, luminosity 20-50% current value. ...

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