Astronomija i sve o Svemiru

[Astora]

Got an experiment you want to fly suborbital then apply to NASA's flight opportunities program

The NASA Office of the Chief Technologist (OCT) Flight Opportunities Program intends to mature towards flight readiness status new crosscutting technologies that advance or enable multiple future space missions. To facilitate this goal, NASA is providing access to certain flight opportunities available to the Agency, on a no-exchange-of funds basis, to entities that have technology payloads meeting specified criteria.

Proposal Schedule for Virgin Galactic Flight Opportunity:

AFO #6 Proposals Due Dec 21, 2012

AFO #6 Selections (tentative) Feb 28, 2013

All details can be found here -

http://nspires.nasaprs.com/external/solicitations/summary.do?method=init&solId=%7B0A6C5D60-20F3-E7FE-D4A3-710AE8AA43B6%7D&path=open

By NASA !

[Astora]

Dawn Sees "Young" Surface on Giant Asteroid

Like a Hollywood starlet constantly retouching her makeup, the giant asteroid Vesta is constantly stirring its outermost layer to present a young face. Data from NASA's Dawn mission show that a form of weathering that occurs on the moon and other airless bodies we've visited in the inner solar system does not alter Vesta's outermost layer in the same way. Carbon-rich asteroids have also been splattering dark material on Vesta's surface over a long span of the body's history. The results are described in two papers released today in the journal Nature.

"Dawn's data allow us to decipher how Vesta records fundamental processes that have also affected Earth and other solar system bodies," said Carol Raymond, Dawn deputy principal investigator at NASA's Jet Propulsion Laboratory, Pasadena, Calif. "No object in our solar system is an island. Throughout solar system history, materials have exchanged and interacted."

Over time, soils on Earth's moon and asteroids such as Itokawa have undergone extensive weathering in the space environment. Scientists see this in the accumulation of tiny metallic particles containing iron, which dulls the fluffy outer layer. Dawn's visible and infrared mapping spectrometer (VIR) and framing camera detected no accumulation of such tiny particles on Vesta, and this particular protoplanet, or almost-planet, remains bright and pristine.

Nevertheless, the bright rays of the youngest features on Vesta are seen to degrade rapidly and disappear into background soil. Scientists know frequent, small impacts continually mix the fluffy outer layer of broken debris. Vesta also has unusually steep topography relative to other large bodies in the inner solar system, which leads to landslides that further mix surface material.

"Getting up close and familiar with Vesta has reset our thinking about the character of the uppermost soils of airless bodies," said Carle Pieters, one of the lead authors and a Dawn team member based at Brown University, Providence, R.I. "Vesta 'dirt' is very clean, well mixed and highly mobile."

Early pictures of Vesta showed a variety of dramatic light and dark splotches on Vesta's surface. These light and dark materials were unexpected and now show the brightness range of Vesta is among the largest observed on rocky bodies in our solar system.

Dawn scientists suspected early on that bright material is native to Vesta. One of their first hypotheses for the dark material suggested it might come from the shock of high-speed impacts melting and darkening the underlying rocks or from recent volcanic activity. An analysis of data from VIR and the framing camera has revealed, however, that the distribution of dark material is widespread and occurs both in small spots and in diffuse deposits, without correlation to any particular underlying geology. The likely source of the dark material is now shown to be the carbon-rich material in meteoroids, which are also believed to have deposited hydrated minerals from other asteroids on Vesta.

To get the amount of darkening we now see on Vesta, scientists on the Dawn team estimate about 300 dark asteroids with diameters between 0.6 to 6 miles (1 and 10 kilometers) likely hit Vesta during the last 3.5 billion years. This would have been enough to wrap Vesta in a blanket of mixed material about 3 to 7 feet (1 to 2 meters) thick.

"This perpetual contamination of Vesta with material native to elsewhere in the solar system is a dramatic example of an apparently common process that changes many solar system objects," said Tom McCord, the other lead author and a Dawn team member based at the Bear Fight Institute, Winthrop, Wash. "Earth likely got the ingredients for life - organics and water - this way."

Launched in 2007, Dawn spent more than a year investigating Vesta. It departed in September 2012 and is currently on its way to the dwarf planet Ceres.

JPL manages the Dawn mission for NASA's Science Mission Directorate in Washington. Dawn is a project of the directorate's Discovery Program, managed by NASA's Marshall Space Flight Center in Huntsville, Ala. The University of California at Los Angeles (UCLA) is responsible for overall Dawn mission science. Orbital Sciences Corp. in Dulles, Va., designed and built the spacecraft. The German Aerospace Center, the Max Planck Institute for Solar System Research, the Italian Space Agency and the Italian National Astrophysical Institute are international partners on the mission team. The California Institute of Technology in Pasadena manages JPL for NASA.

For more information about Dawn, visit: http://www.nasa.gov/dawn and http://dawn.jpl.nasa.gov .

Jia-Rui Cook

Jet Propulsion Laboratory, Pasadena, Calif.

818-354-0850

jccook@jpl.nasa.gov

2012-342

Izvinjavam se sto je na Engleskom, ne bih da prevodim jer bi bilo previse smesno..

Continuing Work With Scoops at 'Rocknest'

The Mars Hand Lens Imager (MAHLI) on the arm of NASA's Mars rover Curiosity took this image of a rock called "Et-Then" during the mission's 82nd sol, or Martian day (Oct. 29, 2012.) Image Credit: NASA/JPL-Caltech/MSSS

› Full image and caption › Latest images › Curiosity gallery › Curiosity videos

NASA's Mars Rover Curiosity on Sol 82 (Oct. 29, 2012) used its Mars Hand Lens Imager (MAHLI) to photograph the diverse rocks in the "Rocknest" area and prepared for an overnight analysis of a soil sample by the Chemistry and Mineralogy (CheMin) instrument.

On the preceding sol, the rover completed its third round of using vibration of scooped Martian soil to scrub the interior surfaces of the sample-processing mechanisms on the rover's arm. Also on Sol 81, the rover's Sample Analysis at Mars (SAM) instrument completed an analysis of a sample of Martian atmosphere.

The rover continues regular monitoring of the surrounding environment using the other instruments of its science payload.

Sol 82, in Mars local mean solar time at Gale Crater, ended at 1:35 p.m. Oct. 29, PDT (4:35 p.m., EDT).

Guy Webster 818-354-6278

Jet Propulsion Laboratory, Pasadena, Calif.

guy.webster@jpl.nasa.gov

2012-339

Edited October 31, 2012 by edit_

[Astora]

True colour of exoplanet measured for the first time!

Astronomers using the NASA/ESA Hubble Space Telescope have, for the first time, determined the true colour of a planet orbiting another star. If seen up close this planet, known as HD 189733b, would be a deep azure blue, reminiscent of Earth's colour as seen from space.

But that's where the similarities end. This "deep blue dot" is a huge gas giant orbiting very close to its host star. The planet's atmosphere is scorching with a temperature of over 1000 degrees Celsius, and it rains glass, sideways, in howling 7000 kilometre-per-hour winds.

At a distance of 63 light-years from us, this turbulent alien world is one of the nearest exoplanets to Earth that can be seen crossing the face of its star. It has been intensively studied by Hubble and other telescopes, and its atmosphere has been found to be dramatically changeable and exotic, with hazes and violent flares. Now, this planet is the subject of an important first: the first measurement of an exoplanet's visible colour.

"This planet has been studied well in the past, both by ourselves and other teams," says Frédéric Pont of the University of Exeter, UK, leader of the Hubble observing programme and an author of this new paper. "But measuring its colour is a real first—we can actually imagine what this planet would look like if we were able to look at it directly."

 

[Rejz]

Pre par dana uzeo da gledam How the Universe Works i vidim u nekim epizodama dr. Alexa Filipenka i setih se kako sam pre koju godinu gledao njegov kurs od 96 lekcija koji je maestralan, bolji uvod u astronomiju i nacin prezentacije u zivotu nisam video.

Ime kursa je TTC Understanding the Universe, ima da se skine na zalivu, obavezno pogledajte.

[Thunderstorm]

Od uvek me je interesovala astronomija, stavio sam da skidam pa javljam utiske kad odgledam :).

Edited August 2, 2013 by Thunderstorm

[Rejz]

Iskoristicu ovaj topic za eventualnu diskusiju oko amaterskog posmatranja svemira i da dam neke svoje preporuke.

 

Naime, porucio sam dvogled koji je odlican za posmatranje nocnog neba, nalazi se u nizem cenovnom rangu, odlican za pocetnike i za iskusne, a koji je najbolja kupovina za dati novac i napomenuo bih da je to preporuka nasih amatera astronoma. Takodje, kod nas se moze naci dvogled slicnih specifikacija (drugog proizvodjaca) za duplo vise para, a pride je losijeg kvaliteta.

 

Dakle, u pitanju je dvogled TS 10x50 LE. Proizvodjac je Nemacka firma Telescope Service, nema da se kupi kod nas ali moze da se poruci preko njihovog web shop-a, kao i preko jedne od najvecih online prodavnica za teleskope i sve sto ide uz ovaj hobi.

 

Kao sto se vidi iz imena u pitanju je dvogled sa uvecanjem od 10x (koliko puta ce posmatrani objekat biti uvelican, tj. ako je udaljenog posmatranog objekta 1000m, izgledace kao da je udaljen 100m) i precnikom sociva od 50mm (sto je veci precnik to je slika svetlija i izostrenija). Dvogledi dimenzija 10x50 su na samoj granici dvogleda koji se mogu uspesno koristiti drzanjem u ruci bez koriscenja tronozca ili slicnog pomagala, tako da se ne treba zaletati i odmah juriti vece, samim tim i teze dvoglede, primera radi 15x70, 20x80, 25x100, itd.

 

Jos jedna bitna stavka je izlazna pupila (velicina svetlosnog kruga koji izlazi iz okulara) koji se dobija kada se podeli precnik sociva sa uvecanjem, u ovom slucaju je to 5mm. Ako je izlazna pupila prevelika, oko ce morati da "seta" kako bi videlo ceo prizor, a ako je premala, povrsina oka zaduzena za skupljanje svetlosti nece biti u potpunosti iskoriscena. Kako je ljudska zenica maksimalno otvorena izmedju 5-7mm (pricamo o otvoru zenice oka prilagodjenog na mrak) onda treba uzeti i dvogled sa najpribliznijom izlaznom pupilom. Napomena, ovo samo vazi za uredjaje sa malim uvecanjem, za teleskope je vec druga prica.

 

Ono sto je jos bitno je eye relief, tj. maksimalna udaljenost sa koje se moze gledati kroz okular bez gubitaka prikaza. Za nas corave je ovo bitno jer omogucava koriscenje adekvatnih dvogleda bez skidanja naocara. Ovaj dvogled koji sam ja uzeo u oznaci ima LE sto znaci long eye relief.

 

Dolazimo do prizmi. Dvogledi se uvek prave sa jednom od dve vrste prizama, roof ili porro. Ukratko, namena im je ista, da isporuce pravilnu sliku i da skrate put izmedju ulaznog sociva (objektiva) i okulara, tako sto reflektuju svetlost duz savijene putanje. Dobri dvogledi sa roof prizmama kostaju boga oca, tako da su standardni dvogledi namenjeni za astronomiju opremljeni porro prizmama. Takodje, tu su i dva tipa stakala koja se koriste za pravljenje prizama, BK-7 i BAK-4. Dovoljno je reci da su BAK-4 prizme bolje.

 

Ima tu jos dosta toga ali cu zatvoriti pricu sa premazima sociva. Premazi se rade sa specijalnim hemikalijama koje smanjuju unutrasnju refleksiju svetlosti, cime se omogucava veci protok svetlosti do oka i takodje smanjuje efekat "ghostinga" koji se javlja posmatranjem svetlijih objekata. Premazi se dele na nekoliko vrsta, a dovoljno je reci da su najbolji dvogledi oni sa celokupnim mnogostrukim premazom (broadband multicoating).

 

To je to sto se tice neke uvodne price o dvogledima, kako funkcionisu i na sta je bitno obratiti paznju pri kupovini. Dalje, preporucio bih nabavku nekog Star Atlasa (atlasi sa mapama zvezda, tj. konstelacija i pripadajucih objekata), npr. Pocket Star Atlas je odlican i kompaktan za koriscenje napolju. Naravno, moze se i bez knjiga, postoji mnostvo softvera kako za PC tako i za mobilne telefone. Za PC tu je neprevazidjeni Stellarium, a za mobilne Mobile Observatory, SkEye, Star Chart, itd.

 

Nadam se da ce ovo nekome pomoci, a ja cu dodatno pisati na temu kako budem sticao vise iskustva. Do sada sam se iskljucivo bavio knjigama na ovu temu, a vreme je davno doslo da se nesto preduzme na prakticnom nivou :)

 

Jos jedna stvar, ne treba ni dvogled, a kamoli i teleskop za uzivanje u posmatranju nocnog neba. U manje svetlosno zagadjenim podrucjima mnogo toga se moze videti na nebu sa golim okom. Koga interesuje moze svaki dan da posmatra prelet medjunarodne svemirske stanice, uglavnom traje izmedju 1-4 minuta. Ja sam npr. gledao sa Kalemegdana i fenomenalno se videlo, te na bilo kom drugom mestu se moze videti jos bolje. Na NASA-inom sajtu se moze pratiti vreme preleta i polozaj na nebu.

 

Uzivajte :)

[Dule_smor]

ja imam meade reflektorski teleskop od 102mm...odlican je za posmatranje meseca, a nije los ni za mars, jupiter, satrurn i njihove satelite...mada u poslednje vreme ga jako retko koristim:(

[Doca]

ti jedva vidiš na oči a kamoli da se cimaš sa teleskopom.

 

AJDE BRE

 

Edited August 21, 2013 by Doca.

[Rejz]

Ja cu poneti rakiju, ti ponesi teleskop, pa cemo videti vise od jednog meseca :P

Salu na stranu, ako budes u fazonu da neki put organizujemo bleju, reci, pa cemo okupiti i ostale zainteresovane drugare.

[peja_]

ja cekam da se pojavi monolit

[Dule_smor]

peja drug...elem, mogli bi nekad da organizujemo neku bleju sa pivom/rakijom i teleskopom, pozeljno bi bilo negde van grada gde je manje svetlosno zagadjenje...pogledacu ovih dana bas u kakvom je stanju teleskop, valjda mu nije prasina sjebala ogledalo

[Rejz]

Moze, ti kad stignes javi kakvo je stanje pa da mozemo da planiramo neki dan kada ce se planete najbolje videti.

[Lucky]

Američka svemirska agencija NASA lansirala je noćas sondu za ispitivanje atmosfere Meseca i mesečeve prašine.

 

Sonda je lansirana iz mesta Valops, u državi Virdžiniji, na jugoistočnoj obali SAD, nešto pre ponoći po lokalnom vremenu, (oko šest sati ujutro u subotu po centralnoevropskom vremenu). Sonda treba da stigne u mesečevu orbitu za mesec dana.

NASA je promenila svoje uobičajeno mesto lansiranja Kejp Kanaveral na Floridi i lansirala sondu sa istočne obale u Virdžiniji.

Letelica koja se zove LADEE (engleska skraćeniza za Istraživač lunarne atmosfere i prašine) ide zaobilaznim putem do Meseca, prethodno će tri puta okružiti Zemlju pre nego što stigne dovoljno blizu da uđe u mesečevu orbitu.

 

Zrnca prašina mogla bi da objasne misteriju svetlosti koju su astronauti Apola između 1969. i 1972. primetili na horizontu neposredno pred izlazak Sunca, navela je NASA.

[Astora]

Bon voyage, Voyager

[Dule_smor]

Voyager 1 i 2 su najjace sonde koje su ikada napravljene, suza mi krene svaki put kad vidim sliku:')

[Astora]

Part of the history Dule. Evo i detaljne price.

 

NASA Spacecraft Embarks on Historic Journey Into Interstellar Space

 

 

PASADENA, Calif. -- NASA's Voyager 1 spacecraft officially is the first human-made object to venture into interstellar space. The 36-year-old probe is about 12 billion miles (19 billion kilometers) from our sun.

New and unexpected data indicate Voyager 1 has been traveling for about one year through plasma, or ionized gas, present in the space between stars. Voyager is in a transitional region immediately outside the solar bubble, where some effects from our sun are still evident. A report on the analysis of this new data, an effort led by Don Gurnett and the plasma wave science team at the University of Iowa, Iowa City, is published in Thursday's edition of the journal Science.

"Now that we have new, key data, we believe this is mankind's historic leap into interstellar space," said Ed Stone, Voyager project scientist based at the California Institute of Technology, Pasadena. "The Voyager team needed time to analyze those observations and make sense of them. But we can now answer the question we've all been asking -- 'Are we there yet?' Yes, we are."

Voyager 1 first detected the increased pressure of interstellar space on the heliosphere, the bubble of charged particles surrounding the sun that reaches far beyond the outer planets, in 2004. Scientists then ramped up their search for evidence of the spacecraft's interstellar arrival, knowing the data analysis and interpretation could take months or years.

Voyager 1 does not have a working plasma sensor, so scientists needed a different way to measure the spacecraft's plasma environment to make a definitive determination of its location. A coronal mass ejection, or a massive burst of solar wind and magnetic fields, that erupted from the sun in March 2012 provided scientists the data they needed. When this unexpected gift from the sun eventually arrived at Voyager 1's location 13 months later, in April 2013, the plasma around the spacecraft began to vibrate like a violin string. On April 9, Voyager 1's plasma wave instrument detected the movement. The pitch of the oscillations helped scientists determine the density of the plasma. The particular oscillations meant the spacecraft was bathed in plasma more than 40 times denser than what they had encountered in the outer layer of the heliosphere. Density of this sort is to be expected in interstellar space.

The plasma wave science team reviewed its data and found an earlier, fainter set of oscillations in October and November 2012. Through extrapolation of measured plasma densities from both events, the team determined Voyager 1 first entered interstellar space in August 2012.

"We literally jumped out of our seats when we saw these oscillations in our data -- they showed us the spacecraft was in an entirely new region, comparable to what was expected in interstellar space, and totally different than in the solar bubble," Gurnett said. "Clearly we had passed through the heliopause, which is the long-hypothesized boundary between the solar plasma and the interstellar plasma."

The new plasma data suggested a timeframe consistent with abrupt, durable changes in the density of energetic particles that were first detected on Aug. 25, 2012. The Voyager team generally accepts this date as the date of interstellar arrival. The charged particle and plasma changes were what would have been expected during a crossing of the heliopause.

 "The team’s hard work to build durable spacecraft and carefully manage the Voyager spacecraft's limited resources paid off in another first for NASA and humanity," said Suzanne Dodd, Voyager project manager, based at NASA's Jet Propulsion Laboratory, Pasadena, Calif. "We expect the fields and particles science instruments on Voyager will continue to send back data through at least 2020. We can't wait to see what the Voyager instruments show us next about deep space."

Voyager 1 and its twin, Voyager 2, were launched 16 days apart in 1977. Both spacecraft flew by Jupiter and Saturn. Voyager 2 also flew by Uranus and Neptune. Voyager 2, launched before Voyager 1, is the longest continuously operated spacecraft. It is about 9.5 billion miles (15 billion kilometers) away from our sun.

Voyager mission controllers still talk to or receive data from Voyager 1 and Voyager 2 every day, though the emitted signals are currently very dim, at about 23 watts -- the power of a refrigerator light bulb. By the time the signals get to Earth, they are a fraction of a billion-billionth of a watt. Data from Voyager 1's instruments are transmitted to Earth typically at 160 bits per second, and captured by 34- and 70-meter NASA Deep Space Network stations. Traveling at the speed of light, a signal from Voyager 1 takes about 17 hours to travel to Earth. After the data are transmitted to JPL and processed by the science teams, Voyager data are made publicly available.

“Voyager has boldly gone where no probe has gone before, marking one of the most significant technological achievements in the annals of the history of science, and adding a new chapter in human scientific dreams and endeavors,” said John Grunsfeld, NASA’s associate administrator for science in Washington. “Perhaps some future deep space explorers will catch up with Voyager, our first interstellar envoy, and reflect on how this intrepid spacecraft helped enable their journey.”

Scientists do not know when Voyager 1 will reach the undisturbed part of interstellar space where there is no influence from our sun. They also are not certain when Voyager 2 is expected to cross into interstellar space, but they believe it is not very far behind.

JPL built and operates the twin Voyager spacecraft. The Voyagers Interstellar Mission is a part of NASA's Heliophysics System Observatory, sponsored by the Heliophysics Division of NASA's Science Mission Directorate in Washington. NASA's Deep Space Network, managed by JPL, is an international network of antennas that supports interplanetary spacecraft missions and radio and radar astronomy observations for the exploration of the solar system and the universe. The network also supports selected Earth-orbiting missions.

The cost of the Voyager 1 and Voyager 2 missions -- including launch, mission operations and the spacecraft’s nuclear batteries, which were provided by the Department of Energy -- is about $988 million through September.

For a sound file of the oscillations detected by Voyager in interstellar space, animations and other information, visit: http://www.nasa.gov/voyager .

For an image of the radio signal from Voyager 1 on Feb. 21 by the National Radio Astronomy Observatory's Very Long Baseline Array, which links telescopes from Hawaii to St. Croix, visit:

http://www.nrao.edu .

Jia-Rui C. Cook/D.C. Agle 818-354-0850/818-393-9011
Jet Propulsion Laboratory, Pasadena, Calif.
jccook@jpl.nasa.gov

Dwayne Brown 202-358-1726
Headquarters, Washington
dwayne.c.brown@nasa.gov

2013-277       

[Dule_smor]

http://www.slate.com/blogs/bad_astronomy/2013/09/13/voyager_1_space_probe_is_in_now_in_interstellar_space.html

[Guest]

koliko smaraju, već su jedno pet puta objavljivali da je neki od vojadžera napustio sunčev sistem :(

[Muerte]

Meni se "posebno dopalo" što šalju Voyager-ima "našu adresu" gde mogu da nas nađu, ako im padne na pamet da "nas" "naguze"

 

Ima dovoljno primera iz istorije kako prolazi susret "naprednih civilizacija" sa "zaostalima"

 

Možda "nas" baš neće ali imaju ~5 milijardi godina vremena dok Sunce ne postane crveni div i pretvori sve belce u "indijance"

[Guest]

ako mi već na ovom nivou razvoja pronalazimo planete nalik zemlji izvan sunčevog sistema, nekoj civilizaciji koja može da nas naguzi je sigurno trivijalno da nas pronađe. zaboravljaš četvrtu dimenziju, sva je prilika da su druge civilizacije postojale i da će postojati, ali su male šanse da postoje baš paralelno sa našom.

[Dule_smor]

drejk otac, stanislav lem car

 

http://en.wikipedia.org/wiki/Drake_equation

[Muerte]

ako mi već na ovom nivou razvoja pronalazimo planete nalik zemlji izvan sunčevog sistema, nekoj civilizaciji koja može da nas naguzi je sigurno trivijalno da nas pronađe. zaboravljaš četvrtu dimenziju, sva je prilika da su druge civilizacije postojale i da će postojati, ali su male šanse da postoje baš paralelno sa našom.

 

Eh dobro nisam baš mislio u paranoičnom smislu, (uzevši u obzir da je veličina našeg sunca i celog sistema "smešna" u resursima u poredjenju sa ostalima) ali moje subjektivno mišljenje je: Nikad se ne treba "mazati vazelinom" unapred.

Predugo sam SF fan da bih bilo kakvu "sitnicu" primao olako.

[Dule_smor]

Odredjena escape velocity za nasu galaksiju Mlecni put. Kada bi svemirski brod krenuo iz Suncevog sistema i hteo da napusti nasu galaksiju morao bi da razvije brzinu od 537 km/s, oko 0.2% brzine svetlosti. Brzina potrebna da bi se napustila zemljina orbita iznosi oko 11km/s, a da bi se napustio suncev sistem oko 42km/s. Poredjenja radi najbrze svemirske sonde su se kretale brzinom od oko 70km/s, bile su to sonde blizanci Helios 1 i 2. Ali one su koristile tehniku gravitacione pracke, gde ih je sunceva gracitacija ubzala do tih brzina. Slicnu tehniku je koristila i Galileo sonda koju je Jupiter svojom gravitacijom ubrzao do 48km/s.  2018. Nasa planira Solar plus misiju u kojoj ce sonda prici veoma blizu Suncu, na svega 6 miliona km i biti ubrzana do brzine ok 200km/s. To je preko 720.000km/h, tom brzinom bi od Zemlje do Meseca stigli za pola sata:). Ali uz pomoc samo raketnih ili jonskih motora brzine preko 20km/s za sada ostaju nedostizne, a sa njima i svako putovanje van naseg suncevog sistema.

 

http://www.newscientist.com/article/dn24249-stars-escape-velocity-shows-how-to-exit-the-milky-way.html#.UkHjSH9EZSM

[Loopy]

To je onda u suprotnosti sa onim sto pise Wikipedia za Voyagera:

 

On September 12, 2013, NASA announced that Voyager 1 had crossed the heliopause and entered interstellar space on August 25, 2012, making it the first manmade object to do so. As of 2013, the probe was moving with a relative velocity to the Sun of about 17 km/s (38,000 mph; 61,000 km/h).

[Dule_smor]

da, ali to je ralativna brzina sonde u odnosu na sunce u tom trenutku...ova brzina od 42km/s je potrebna kada bi neko probao da napusti suncev sistem iz orbite zemlje, ona se smanjuje sto se vise udaljava od sunca...evo i tabele dole

 

http://en.wikipedia.org/wiki/Escape_velocity