syzygy
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in this thread i will put up some of my special favorites mainly from the NASA - Astronomy Picture Of the Day collection and space.com-IoD.
READ TOPIC THREADED!
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hey! the most beautiful, scaled picture of the solar system i have ever seen! i had to share..
high res version from APOD page
g
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Edited by syzygy (01/08/08 03:08 AM)
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masterlink78
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pluto is not a planet
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syzygy
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wow! are you serious?!
according to the APOD picture it is a "Dwarf Planet".
actually this is a solar system object, member of the Kuiper-belt as far as i know, but let's see some trustable info from wikipedia:
Pluto is a dwarf planet in the solar system, orbiting 29 - 49 AU from the Sun. About a fifth the mass of the Moon, Pluto is primarily composed of rock and water ice. It has an eccentric orbit that is highly inclined with respect to the planets and takes it closer to the Sun than Neptune during a portion of its orbit. Pluto and its largest satellite Charon have often been considered a binary system because they are more nearly equal in size than any of the planet/moon combinations in the solar system, and because the barycentre of their orbits does not lie within either body. Two smaller moons named Nix and Hydra were discovered in 2005. Pluto is smaller than several of the natural satellites or moons in our solar system.
From its discovery by Clyde Tombaugh in 1930, Pluto was considered the ninth planet from the Sun. In the late 20th and early 21st century, many similar objects were discovered in the outer solar system, notably 2003 UB313 (nicknamed "Xena") which is slightly larger than Pluto. In August of 2006 the International Astronomical Union (IAU) redefined the term "planet", and classified Pluto (along with several other trans-Neptunian objects and the asteroid Ceres) as a dwarf planet. Pluto is also classified as the prototype of a family of trans-Neptunian objects. more...
regards,
g
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Edited by syzygy (09/06/06 12:05 AM)
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Villaman
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Thank You syzygy (együttállás)!
I always forget the order of the planets! Now I just have to click here for a reminder.
Here is a nice picture from astroscience.org:
The sun is appearing that small from the Pluto, leaving the other stars
up night and day.
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>>>.>>>>>>>>Angyalos>>>>>>>>>>>>>>>1956>>>>>>Vasarhely>>>>Keresztur>>>>>Szatmar>>>>>>.Szantod
Edited by Villaman (09/06/06 02:44 AM)
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Aulo
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I think the Sun itself should be larger, its kind of "out of scale", too small compared to the rest of the planets. In the illustrated size, it wont make up 99,5% of the total mass of the solar system (i did the radius verification). Otherwise very nice find and thanks for sharing!
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syzygy
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hi aulo!
thanks for radius verification! 
it means the size of sun even smaller than it should be on the picture.
as far as i know sun gives the 99,87% of the mass of sol sys.
regards,
g
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Edited by syzygy (10/05/06 10:39 AM)
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syzygy
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In the Shadow of Saturn
Explanation: In the shadow of Saturn, unexpected wonders appear. The robotic Cassini spacecraft now orbiting Saturn recently drifted in giant planet's shadow for about 12 hours and looked back toward the eclipsed Sun. Cassini saw a view unlike any other. First, the night side of Saturn is seen to be partly lit by light reflected from its own majestic ring system. Next, the rings themselves appear dark when silhouetted against Saturn, but quite bright when viewed away from Saturn and slightly scattering sunlight, in the above exaggerated color image. Saturn's rings light up so much that new rings were discovered, although they are hard to see in the above image. Visible in spectacular detail, however, is Saturn's E ring, the ring created by the newly discovered ice-fountains of the moon Enceladus, and the outermost ring visible above. Far in the distance, visible on the image left just above the bright main rings, is the almost ignorable pale blue dot of Earth. APOD
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Edited by syzygy (10/16/06 02:07 PM)
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syzygy
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Help Search for Interstellar Dust!
Credit & Copyright: Stardust@Home , Project, Space Science Lab. , U.C. Berkeley , NASA
Explanation: What caused that hole? The hole in question appears as a small dark circle on the far right. If the above image of aerogel seems dull and uninteresting, then welcome to one aspect of real world science. The interesting part is that something created that dark hole, and it might well be one of the first pieces of matter ever captured from outside our Solar System. Whatever created that hole was captured by the aerogel of the robotic Stardust spacecraft that flew across our Solar System for years and then returned a capsule to Earth. Scientists are now poring over the aerogel, looking to see what particles have become trapped. Many particles are surely from local Comet Wild 2, which Stardust flew past in 2004. Just a few particles, though, perhaps 10 or less, are expected to be from outside our Solar System. It is so difficult to find them that the Stardust team has created a ***downloadable interactive program*** to allow anyone with a standard computer to help inspect aerogel slices and look for interstellar dust tracks. Good candidate tracks will later be inspected in great detail by members of the Stardust team. APOD page
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syzygy
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as part of my APOD selection let me introduce a great hungarian astrophotographer Éder Iván .
Crescent Venus and Moon
Credit & Copyright: Iván Éder
Explanation: There's something behind these clouds. Those faint graceful arcs, upon inspection, are actually far, far in the distance. They are the Earth's Moon and the planet Venus. Both the Moon and Venus are bright enough to be seen during the day, and both are quite capable of showing a crescent phase. To see Venus, which appears quite small, in a crescent phase requires binoculars or a telescope. In the above dramatic daytime image taken from Budapest, Hungary, the Moon and Venus shared a similar crescent phase a few minutes before the Moon eclipsed the larger but more distant world. About an hour later, Venus reappeared. APOD page
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syzygy
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IC 2118: The Witch Head Nebula
hi-res
Explanation: Double, double toil and trouble; Fire burn, and cauldron bubble -- maybe Macbeth should have consulted the Witch Head Nebula. This suggestively shaped reflection nebula is associated with the bright star Rigel in the constellation Orion. More formally known as IC 2118, the Witch Head Nebula glows primarily by light reflected from bright star Rigel, located just off the upper right edge of the full image. Fine dust in the nebula reflects the light. The blue color is caused not only by Rigel's blue color but because the dust grains reflect blue light more efficiently than red. The same physical process causes Earth's daytime sky to appear blue, although the scatterers in Earth's atmosphere are molecules of nitrogen and oxygen. The nebula lies about 1000 light-years away. nasa - APOD page
GSky overlay from APOOD
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Edited by syzygy (01/08/08 03:12 AM)
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