Asteroidi,komete,meteori

4

Asteroidi,komete,meteori

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Pa kako smo prosli...


P.s: mrzi me da citam engleski.......Smile



Registruj se da bi učestvovao u diskusiji. Registrovanim korisnicima se NE prikazuju reklame unutar poruka.
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a jel ovo nesto ozbiljno ili se samo vi zezate , misilim ako je ozbiljno da idem ja de se ispozdravljam sa rodbinom Smile !



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werther ::a jel ovo nesto ozbiljno ili se samo vi zezate , misilim ako je ozbiljno da idem ja de se ispozdravljam sa rodbinom Smile !

brate proslo je to

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"Deep Impact" makes better impact than planned: mission scientists
www.chinaview.cn 2005-07-05 15:28:47

LOS ANGELES, July 4 (Xinhuanet)-- The hyper-speed bombardment of NASA's Deep Impact probe on the comet Tempel 1 has yielded better effect and more information than planned, mission scientists said on Monday.

A NASA space probe struck the comet Tempel 1 as planned early Monday morning, by which scientists hope to have a peek at the comet's heart to expand understanding of the formation of the solar system. The collision occurred about 24 hours after the copper projectile was released from its mothership Deep Impact. (Photo: Xinhua/AFP)

The spacecraft's "impactor" smashed into the potato-shaped Tempel 1 comet 130 million kilometers from earth at about 22:52 PDT (05:52 GMT Monday) Sunday night.

The Impact generated an immense flash of light that provided anexcellent light source for the two cameras on the Deep Impact mothership, the so-called flyby craft, mission members at NASA's Jet Propulsion Laboratory (JPL) said.

Deep Impact scientists theorized that the impactor had vaporized deep below the comet's surface in the collision.

"You cannot help but get a big flash when objects meet at 23,000 miles per hour," said Deep Impact co-investigator Pete Schultz.

"The heat produced by impact was at least several thousand degrees Kelvin, and at that extreme temperature just about any material begins to glow. Essentially, we generated our own incandescent photo flash for less than a second," he told a press conference at JPL based in Pasadena, California.

Dalje

NASA probe leaves crater, debris trail on comet

By Gina Keating
Mon Jul 4, 6:53 PM ET

PASADENA, Calif. (Reuters) - A spectacular collision between a spacecraft and a comet has freed a huge plume of primordial material from the comet's nucleus that could unlock the secret of how life arrived on Earth,
NASAscientists said on Monday.

The first images returned from the Deep Impact fly-by spacecraft showed a small fireball followed by a much larger, incandescent flash that engulfed one end of the comet Tempel 1 as the impactor smashed into its surface at 1:52 a.m. EDT (0552 GMT) on Monday.

The impactor was vaporized upon slamming into the comet at 23,000 mph (37,000 kph) -- the speed it would take to fly from New York to Los Angeles in about six minutes.

The collision, which occurred 83 million miles from Earth, marks the first time a spacecraft has come in contact with a comet.

Observatories on the ground reported that the explosion brightened the comet by a factor of 5 within 15 minutes of impact, scientists at NASA's Jet Propulsion Laboratory in Pasadena said.

Scientists could not immediately determine the size of the crater produced by the impact because of the large plume of ice, dust and gases streaming out and obscuring one end of the comet, which is half the size of Manhattan.

"We are waiting for the outgassing to stop. It's clear it's was still coming out for several hours ... and could go on for weeks," principal scientist Mike A'Hearn told reporters at a Monday news conference.

Dalje

Comet crash clues for Europe
By Paul Rincon
BBC News science reporter

Read all about Deep Impact
As Nasa controllers whooped and cheered in California at news of Deep Impact's success, their efforts were being watched intently by scientists in far-off London.

Through a live link to a news conference in London, UK space scientists were sharing in some of the delight and fascination of Deep Impact's American team.

This was due in part to the enormous amount of information scientists are certain to glean from the collision.

And British researchers have been observing the collision from telescopes around the world, including the Faulkes Telescope and United Kingdom Infra-Red Telescope (UKIRT) in Hawaii, The INT telescope in Spain and the UK Schmidt telescope in Australia.

Dalje

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Gama ::Pa kako smo prosli...

1:0 za Amere Mr. Green

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"To lutko"....Rusi imaju kontru....


ps.kad ce da pocnju ispitivanja...
moze li neko da mi definise jedinicu kilotona...ali da je ne uporedjuje sa onim a-bombama u japanu...

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@Gama

Kakva kontra? Shocked

Sto se kilotona tice, to si mogao i Google da pitas... Jedan kiloton odgovara hiljadu tona eksploziva...
Evo ti primer:
http://www.atomicarchive.com/Example/Example1.shtml

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The brighter-than-expected white flash of light climaxed a daring mission "that's something to be proud of on America's birthday," said Rick Grammier, the mission's project manager at NASA's Jet Propulsion Laboratory.

About 12 hours after the barrel-sized Deep Impact space probe smashed into a comet half the size of Manhattan, scientists showed off dramatic, sci-fi-like images. Photos shot by the impactor probe as it awaited its suicidal collision revealed for the first time the surface of the comet Tempel 1 as it closed in at 23,000 mph.

The close-ups revealed not so much the pickle-shaped comet that scientists originally thought, but one that looked more like a potato, lumpy and pocked. Michael A'Hearn, an astronomer at the University of Maryland and Deep Impact principal investigator, likened it to a muffin or loaf of bread.

The impact released a bright flash followed by a larger one as a plume of trapped gas and debris spewed from the comet's belly into space, backlit by the sun. The cloud blocked scientists' view of the excavated crater and it could be weeks before the dust disappears. Still, scientists were confident they accomplished their mission because they were able to see the crater's shadow in the photos.

"Our experiment went very, very well," said co-investigator Pete Schultz of Brown University, who seemed to be brimming with enthusiasm. "We touched a comet and we touched it hard."

The mission seemed to spark enthusiasm of skywatchers too. Officials at JPL said the Deep Impact web site had 1 billion hits, compared to some 400 million hits for the Mars mission.

Scientists said the comet appears to have a soft, dusty surface with crater-like features. Trapped ice seems to be below the surface, possibly containing the primordial ingredients of the solar system, Schultz said. Scientists are hoping to get to the core of this rocky, ice-filled structure to learn about the origins of the sun and planets.

A giant cloud of gas and dust collapsed to create Earth's solar system about 4.5 billion years ago, and comets formed from the leftover building blocks of the solar system.

The mission also gives scientists some information about how they might one day stop a comet if one threatens Earth — but they would need a far larger strike to make a significant dent in turning a comet off-course, A'Hearn said.

Launched on its mission Jan. 12 from Cape Canaveral, Fla., the Deep Impact spacecraft traveled 268 million miles to get the comet in its sights. Late Saturday, it released its copper "impactor" probe and pointed it toward Tempel 1, 83 million miles from Earth. The probe made a 24-hour solo flight toward the comet, heading for a smash-up.

The camera of the probe temporarily blacked out twice, probably from being sandblasted by comet debris, NASA scientists said. Still, on battery power and tumbling toward the comet, using thrusters to get a perfect aim, it took pictures right up to the final moments. The last image was taken three seconds before impact.

Soon after it crashed on the comet's sunlit side, the mothership came within 310 miles of the comet and took pictures of the receding comet as it flew away. More images will be produced by an arsenal of space observatories in the coming days.

The energy produced from the impact was equivalent to exploding five tons of dynamite and it caused the comet to shine six times brighter than normal.

The crash was not visible from Earth except through a telescope in western parts of the Western Hemisphere. But the impact late Sunday was cause for celebration, not only to scientists in mission control, but for the more than 10,000 people camped out at Hawaii's Waikiki Beach to watch it on a giant movie screen.

Brian Spears, a 19-year-old anthropology student and Star Trek fan from San Bernardino, Calif., called the event "really a key point in our whole lives. We might find out the origins of how we came along."

"It's almost like one of those science fiction movies," said Steve Lin, a Honolulu physician.

The cosmic crash did not significantly alter the comet's orbit around the sun and NASA said the experiment never posed any danger to Earth — unlike the scary comet in the 1998 movie, "Deep Impact."

Scientists at mission control erupted in applause and exchanged hugs as a voice on a speaker proclaimed, "Team, we got a confirmation."

It was a milestone for the U.S. space agency, because no other space mission has flown this close to a comet. In 2004, NASA's Stardust craft flew within 147 miles of Comet Wild 2 en route back to Earth carrying interstellar dust samples.

In Darmstadt, Germany, controllers at the European Space Agency erupted into applause when the collision occurred. "The Deep Impact mission brought the world together in an excellent opportunity to make a new step into the advancement of cometary science," said the ESA's David Southwood.

The European agency was photographing the event with its Rosetta spacecraft, which will attempt to rendezvous with a comet in 2014.

"I had some doubts, quite frankly, but it was quite spectacular and a deserved success," said Manfred Warhaut, who heads the Rosetta mission. "The whole thing was so flawlessly put in place and executed it deserves some respect."

http://news.yahoo.com/s/ap/20050705/ap_on_sc/comet.....NlYwM3NTM-

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Šta ako na toj kometi postoje neki oblici života .. ili je vlasništvo nekih drugih bića iz kosmosa ?
Znači li u tom slučaju da smo objavili rat ?

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SVITAC ::Šta ako na toj kometi postoje neki oblici života .. ili je vlasništvo nekih drugih bića iz kosmosa ?
Znači li u tom slučaju da smo objavili rat ?


Mislim da moramo da oformimo tim za pregovore Mr. Green

Postoji teorija da je sav organski materijal od koga smo mi nastali dosao sa neke komete koja je udarila u zemlju...
Mozda smo gadjali rodjake Wink

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