spacepron - Daphnis
 

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NASA's Cassini spacecraft has captured the closest images of Saturn's moon Daphnis to date. In these raw images obtained on July 5, 2010, the moon can be seen orbiting in a rift known as the Keeler Gap in one of Saturn's rings.

This tiny little fellow is Daphnis, a moon that's just five miles wide and located inside a small gap in Saturn's rings. This image is the clearest shot yet of Daphnis and the warping effects it's having on the rings.

Daphnis was first discovered in 2005. It slots into the Keeler Gap, a 26-mile wide rift in one of Saturn's outer rings. Saturn's rings are 175,000 miles in diameter, which is about 3/4 the distance from the Earth to the Moon. Although the rings appear continuous in most images of Saturn, they are actually composed of countless pieces of ice and dirt that can be anywhere from a few particles to the size of a small town. Daphnis is the second moon found within a gap between the rings, with the 16-mile wide Pan the first to be discovered.

Both Daphnis and Pan are "shepherd moons", and indeed they take their names from mythological figures associated with shepherds. Shepherd moons are so named because they control the borders of the rings and maintain clearly defined edges in the same way that a shepherd herds his flock into an orderly shape. The gravity of these moons keeps most of the pieces of the ring in place, and anything wanders into their wake either gets deflected back, ejected into space, or merged with the moon.

That said, this image taken by the Cassini spacecraft also shows another side to Daphnis's gravitational control. Much as it works to keep the overall ring borders smooth, you can also see the disturbances it causes to the areas of the ring directly around it. These gravity ripples extend both horizontally and vertically, although obviously the horizontal components are far more easily visible in the image.

Wow chil.

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These swirling hydrogen clouds are given their stunning colors by the intense ultraviolet radiation emanating from the newborn stars within. And that massive star right in the middle is so radiant that it's changing the shape of this nebula.

This is the nebula NGC 2467, located some 13,000 light-years from Earth. First discovered in the nineteenth century, the nebula lies within the constellation Puppis in the southern hemisphere. The image you see up top (click on it to see the ultra high-res version) was assembled from images taken by the Hubble Telescope back in 2004. Three different color filters were used to bring out the full majesty of the nebula.

Still, NGC 2467 isn't just beautiful - it's also a working lesson in astrophysics. The new stars shine more brightly than they ever will again, emitting so much radiation that the surrounding clouds of hydrogen gas begin to erode. In particular, the huge, bright star in the upper center of the image is responsible for most of the radiation emanating from the nebula. It's clearing away massive amounts of the surrounding cloud, and this processes pushes the denser regions of the nebula elsewhere. Although some of the new stars are shining through, many more are still hidden behind the clouds, just waiting to make their first appearance to Earth astronomers.

http://spacetelescope.org/videos/heic1012a/

Dat gaat hier ook nog een keer gebeuren :o

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It's the final hours for the Hourglass Nebula, as the central star runs out of nuclear fuel and becomes a white dwarf. And wow, don't those dying embers look like an unblinking gaze of evil?

This new Hubble Space Telescope image shows the rings of flowing gases outlining the fading walls of the nebula's "hourglass." Nitrogen is shown in red, hydrogen in green, and oxygen in blue. Image by AFP/Getty/NASA

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Explanation: This ominous, dark shape sprawling across the face of the Sun is a coronal hole -- a low density region extending above the surface where the solar magnetic field opens freely into interplanetary space. Studied extensively from space since the 1960s in ultraviolet and x-ray light, coronal holes are known to be the source of the high-speed solar wind, atoms and electrons which flow outward along the open magnetic field lines. During periods of low activity, coronal holes typically cover regions just above the Sun's poles. But this extensive coronal hole dominated the Sun's northern hemisphere earlier this week, captured here in extreme ultraviolet light by cameras onboard the Solar Dynamics Observatory. The solar wind streaming from this coronal hole triggered auroral displays on planet Earth.

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This is the clearest, most detailed image of a sunspot ever taken in visible light. These ultra-magnetic structures are thought to be crucial to potentially Earth-threatening space weather, and it's photos like these that will help us better understand the risk.

Sunspots are solar regions that appear much darker than the surrounding area because of extreme magnetic activity. The sudden increase in magnetism blocks convection in the area, which causes a drop in surface temperature. Because they're anywhere from 1,000 to 3,000 degrees cooler than the surrounding parts of the Sun, they become what's known as a black body, which accounts for their apparent darkness. Of course, if you took a sun spot and isolated it from the rest of the Sun, it would still be brighter than pretty much anything on Earth.

Because they're so magnetic, sunspots cause other phenomena such as solar flares, which can disrupt satellites and even expose people in airplanes to radiation. Space weather can, at its most extreme, have even more destructive consequence on Earth, so the more we understand about how these systems form, the better. This particular image gives us our best look yet at a sunspot, and it was taken by the New Solar Telescope at the Big Bear Solar Observatory, which is owned and operated by the New Jersey Institute of Technology.

well hi thurrr

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Imagine a magnetically-bound tube of hot gas, 12,000-miles long and a hundred miles wide, moving at 30,000 miles per hour: That’s what you’re looking at in the picture above, in the highest-resolution image to date of solar phenomena known as spicules.

Tens of thousands of spicules are active at any given moment, created through a complex interaction of sound waves and magnetic fields, shooting upwards and outwards before falling back into the sun minutes later. They compose the chronosphere, an atmospheric layer that surrounds the sun and is as thick as the Earth’s diameter. Most of our own atmosphere is compressed into a layer about seven miles deep.

It’s sometimes easy — for me, anyways — to forget that the sun is 93 million miles away, and that Earthly life exists through the coincidental good fortune of our planetary rock’s location, neither too far nor too close to that ball of gas. This photograph, taken by the Swedish 1-m Solar Telescope, a good reminder.

Spicules: Jets on the Sun [NASA Astronomy Picture of the Day]


Read More http://www.wired.com/wiredscience/20...#ixzz0z5I59dEF

WHERE IS YOUR GOD NOWWWWW sorry science-fapfapfapfapfap.

Hoi. Even zwaaien naar Voyager 1! (lichtpuntje=aarde)


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Dit soort dingen zitten ook in mijn studie :cool: jammer genoeg wel erg weinig ;x

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7500 light-years from Earth, the radiation of nearby stars is carving the cold molecular clouds of the Carina nebula into these strange, fantastical shapes. It's a bit like carving ice figures here on Earth...except these sculptures are one light-year tall.

These figures are composed of cold hydrogen atoms and dust molecules. A mix of extreme stellar winds and strong radiation bursts from nearby stars is shaping the nebula, creating these weird structures. Inside these figures, new stars are hopefully forming.

Not for Sale space pron naamzoek

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The universe has so many dazzling sights that it seems silly to waste time on optical illusions. But some are just too amazing to ignore, like this shot of Saturn's moons Dione and Rhea seemingly morphing together into one mega-moon.

The two moons are actually separated by about a half-million kilometers in this photo, but an amazing combination of factors makes them look like one continuous object. Dione, the top moon in the image, was 1.1 million kilometers from the Cassini spacecraft, which took the photo, and Rhea was 1.6 million kilometers away. Because Dione has a diameter of 1,123 kilometers and Rhea is a bit bigger at 1,528 kilometers across, the two look to be the exact same size from Cassini's perspective.

The two also have a very similar albedo, or reflectivity, which means they appear to have the same amount of brightness. That helps them look like a single object, as does a crater on Dione's south pole. The large, faint crater Evander smooths over what would otherwise be a fairly obvious dividing line between the two moons, making it very difficult to tell where one ends and the other begins.

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Majestic, ringed Saturn little resembles the relatively tiny blue marble that is Earth, but the massive gas giant planet is home to at least one phenomenon that would be familiar to high-latitude dwellers here on Earth. Although the underlying mechanisms may differ somewhat, Saturn has northern and southern lights at its poles, just as Earth does.

Auroras arise when charged particles are funneled along converging magnetic field lines and into the upper atmosphere at the poles. At Earth, the effect is dominated by the solar wind; at Saturn a complex mixture of other geomagnetic phenomena appear to contribute as well. Charged particles striking Saturn's upper atmosphere ionize hydrogen atoms and produce infrared radiation, whereas related processes also give off Saturnian auroras at ultraviolet and radio wavelengths.

The infrared auroras show up in green in this false-color composite from NASA's Cassini spacecraft, stitched together from 65 individual observations taken by the probe's Visual and Infrared Mapping Spectrometer in 2008. According to a NASA news release, the auroral light appears in the near infrared at wavelengths of three to four microns. Blue designates reflected sunlight at two microns, and red represents thermal emissions at five microns.

Dat wil ik!

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This marvelous panoramic view was created by combining a total of 165 images taken by the Cassini wide-angle camera over nearly three hours on Sept. 15, 2006. The full mosaic consists of three rows of nine wide-angle camera footprints; only a portion of the full mosaic is shown here. Color in the view was created by digitally compositing ultraviolet, infrared and clear filter images and was then adjusted to resemble natural color.

The mosaic images were acquired as the spacecraft drifted in the darkness of Saturn’s shadow for about 12 hours, allowing a multitude of unique observations of the microscopic particles that comprise Saturn’s faint rings.

Ring structures containing these tiny particles brighten substantially at high phase angles: i.e., viewing angles where the Sun is almost directly behind the objects being imaged.

During this period of observation Cassini detected two new faint rings: one coincident with the shared orbit of the moons Janus and Epimetheus and another coincident with Pallene’s orbit. (See PIA08322 and PIA08328 for more on the two new rings.)

The narrowly confined G ring is easily seen here, outside the bright main rings. Encircling the entire system is the much more extended E ring. The icy plumes of Enceladus, whose eruptions supply the E ring particles, betray the moon’s position in the E ring’s left side edge.

Interior to the G ring and above the brighter main rings is the pale blue dot of Earth. Cassini views its point of origin from over a billion kilometers (and close to a billion miles) away in the icy depths of the outer solar system. See PIA08324 for a similar view of Earth taken during this observation.

Small grains are pushed about by sunlight and electromagnetic forces. Hence their distribution tells much about the local space environment.

A second version of the mosaic view is presented here in which the color contrast is greatly exaggerated. In such views, imaging scientists have noticed color variations across the diffuse rings that imply active processes sort the particles in the ring according to their sizes.

Looking at the E ring in this color-exaggerated view, the distribution of color across and along the ring appears to be different between the right side and the left. Scientists are not sure yet how to explain these differences, though the difference in phase angle between right and left may be part of the explanation. The phase angle is about 179 degrees on Saturn.

The main rings are overexposed in a few places. Reddish lens flares are visible in both versions of the view. These radially extending artifacts result from light being scattered within the camera optics.

This view looks toward the unlit side of the rings from about 15 degrees above the ringplane.

Cassini was approximately 2.2 million kilometers (1.3 million miles) from Saturn when the images in this mosaic were taken. Image scale on Saturn is about 260 kilometers (162 miles) per pixel.

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Image of the solar transit of the International Space Station (ISS) and Space Shuttle Atlantis (50 minutes after undocking from the ISS, before return to Earth), taken from the area of Mamers (Normandie, France) on september 17th 2006 at 13h 38min 50s UT.

Transit duration: 0,6s. Transit band width on Earth: 7.4 km. ISS distance to observer: 550 km. Speed: 7.4km/s. ISS size: 73m. Distance between ISS and Atlantis: 200m.

Kut, beat me to it :P

:)

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The shape of early 21st century civilization stands out in bright golden lights, in new images from the International Space Station. You can make out the shape of Europe and Africa. Below, see the cities and highways in the desert.

Check out the lights of Cairo and Alexandria in Egypt, as photographed from the ISS:
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And here's the Gulf Coast, the city of Mobile and Mobile Bay, as photographed from 220 miles up:
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All images by NASA.

Seemingly also visible in these photographs is the edge of the impenetrable Ur-Quan Slave Shield that encases our planet.

fapfapfap

?

Not for sale Egel oehoe!

Ja ik dacht old shit is old :o

Maar deze foto's zijn wel heel gaaf (Y)

Heb mn moeder vandaag even een filmpje over de Ultra Deep Field foto's van Hubble laten zien, ze was onder de indruk (y)

gaaaaaaaaaaf

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;)

Spaceboobies.

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grote versie:

In this zoom sequence we start with the spectacular vista of the central regions of the Milky Way galaxy. We then close in on a fuzzy ball of stars, the globular cluster Messier 107, also known as NGC 6171. It lies about 21,000 light-years away in the constellation of Ophiuchus. The final close up view was created from exposures taken through blue, green and near-infrared filters, using the Wide Field Imager (WFI) on the MPG/ESO 2.2-meter telescope at La Silla Observatory, Chile.

Watch an entire hemisphere of the sun explode

In this ultraviolet light video taken by NASA, you can watch a phenomenon that scientists didn't believe could exist until a few months ago. An entire hemisphere of the sun explodes, one region igniting another. What does this discovery mean?

It turns out that the sun doesn't just spurt out gouts of gas in isolated spots. In fact, our star's magnetic field brings many regions of Sol's surface into direct relationships with each other, so areas separated by millions of miles can literally spark each other up. The results are called "sympathetic flares."

lowresfilmpie:


hiresfilmpie:
http://science.nasa.gov/media/medial...disruption.mov

http://science.nasa.gov/science-news...lobaleruption/

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The 51st entry in Charles Messier's famous catalog is perhaps the original spiral nebula--a large galaxy with a well defined spiral structure also cataloged as NGC 5194. Over 60,000 light-years across, M51's spiral arms and dust lanes clearly sweep in front of its companion galaxy, NGC 5195. Image data from the Hubble's Advanced Camera for Surveys was reprocessed to produce this alternative portrait of the well-known interacting galaxy pair. The processing sharpened details and enhanced color and contrast in otherwise faint areas, bringing out dust lanes and extended streams that cross the small companion, along with features in the surroundings and core of M51 itself. The pair are about 31 million light-years distant. Not far on the sky from the handle of the Big Dipper, they officially lie within the boundaries of the small constellation Canes Venatici.

zo awesome.. (y)

rapestick *O*

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The star Zeta Ophiuchi is twenty times the size of our Sun and flying blind through space. Its runaway path has taken it through a huge clump of space dust, creating this beautiful bow-shaped "wake" of gas and dust.

Zeta Ophiuchi was once the companion of another, even bigger star, but its partner went supernova. This ejected Zeta Ophiuchi from its orbit, shooting it off into open space like a humongous bullet. It is now hurtling through space at 54,000 miles per hour, and the latest part of its cosmic odyssey has taken it through this dust cloud. WISE, NASA's infrared telescope, snapped this amazing image of Zeta Ophiuchi and its "bow shock."

NASA experts explain what's going on here:

As the star tears through space, its powerful winds push gas and dust out of its way and into what is called a bow shock. The material in the bow shock is so compressed that it glows with infrared light that WISE can see. The effect is similar to what happens when a boat speeds through water, pushing a wave in front of it. This bow shock is completely hidden in visible light. Infrared images like this one from WISE are therefore important for shedding new light on the region.

nou vooruit, dan hier maar...

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goede bijdrage (y)

bam!

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nouja, even laden, en dan bam.

waar blijft de info? hier kunnen we niets mee, mooie plaatjes zijn niet bijzonder!

dat mag je zelf opzoeken , maar ik post het er voortaan wel even bij.

Cool, ik wil ook uv-ogen