Que pasara el 14 de enero?, que me tienes intrigado
saludos
Quark1/1/2005, 23:54
jajjajajajajaj, :D me explico, una de mis aficiones es la astronomia y el dia 14 de este mes la sonda huygens llega a titan :P
Peperebe2/1/2005, 00:45
Vaya, pues no iba yo muy mal encaminado, al ver la luna(a mi me parecia que era la luna)pensava que el dia 14 habria un eclipse , :D
Saludos
BUBU ;-)2/1/2005, 01:20
Quark, a mí también me encanta la Astronomía. Estudié Física por lo que me gustaba, y me enganché a la revista Tribuna de Astronomía. Últimamente he estado pensando en pillarme un telescopio. ¿Tú tienes uno?
Peperebe2/1/2005, 01:20
Por cierto ¿titan es un satelite/luna de saturno? ¿cual es la finalidad de esa mision?
A mi lo que me gusta mucho es ver documentales de astronomia ,a tener un telescopio ya no llego
Saludos
DarthMober2/1/2005, 01:29
Titán es el principal satélite de Saturno y a su vez la luna más ¨misteriosa¨. La finalidad de la misión es explorar Saturno, ya que es el planeta que más se asemeja a la Tierra por su composición química. Esperemos que todo salga bien porque si no 7 años de viaje apra nada :o:
BUBU ;-)2/1/2005, 01:32
Sí, Titán es la mayor luna de Saturno. La misión es determinar la composición de su atmósfera, que tiene (nuestra Luna no tiene atmósfera), estudiar las estaciones, la actividad de las nubes, buscar moléculas complejas (iniciadoras de la vida...), etc. Está guapito...
DarthMober2/1/2005, 01:43
Vaya, veo que ya somos 4 que nos gusta la astronomía XDD
udirnel2/1/2005, 01:54
5 (y tengo telescopio :D )
Udirnel
Quark2/1/2005, 02:07
Resumen sientisfico: Titan tiene una atmosfera compuesta principalmente de metano y se piensa que en su mayoria, la superficie son mares de hidrocarburos. Se pue decir que es el astro mas interesante del sistema solar despues de la tierra(pa los biologos marcianeros). Tambien pa dar mas informacion, deciros que la mision se llama cassini-huygens(los nombres d los dos pavos que descubrieron las 5 lunas mas importantes de saturno y la division de sus anillos) y su mision es investigar la quimica etc de saturno y sus lunas, pero principalmente es la de saber si habria posibilidad de vida en titan(aunque no lo dicen asi directamente). Toma ia :D
DarthMober2/1/2005, 02:09
Yo tambein tengo uno :lol: .
Uoo 5 personas!
Quark2/1/2005, 02:11
Y mas que habran, al final tendremos que crear un hilo astronomico :D : Makas en el espacio
BUBU ;-)2/1/2005, 02:13
¡¡¡ Bien !!! Porfaplís, los que tengáis telescopio, ¿me podéis decir marca, modelo y precio? Es para ir sondeando el mercado...
PLAYJODETE5/1/2005, 23:34
No , si lo de marcianos va a ser que no viene sólo de las recres eh ? je je
Saludos
MAUL6/1/2005, 11:33
pues otro mas al que le mola le queme las cintas de COSMOS a mi tio jajajajajaja de tanto verlas cuando era ñajo desde entonces me flipa todo lo que tenga que ver con el universo,es que nu somos na eh!
BUBU ;-)10/1/2005, 02:21
Ay, paaayo, arguien que me diga las medidas de sus telercoooopios....
Quark10/1/2005, 02:51
Aaaayyy Josele, yo tenia uno d esos que miras por un lao y se ve mas grande que cuando miras por el otro lao :lol: uno d esos de 900mm chatarreros pero er tripode tenia un autostar y me molaba mushoooo, me pire a madrid a vivir y pa pagar la fragoneta tuve que venderlo, to una lastima josele. Pa habernos matao :P
BUBU ;-)10/1/2005, 09:01
Ja me maaaaaaaaaaaten
Vaquero14/1/2005, 01:06
Pues ya es 14 :P
Quark14/1/2005, 01:18
Hoy a las 11.30 am sabremos si los de la ESA son competentes :P
BUBU ;-)14/1/2005, 02:06
Como se hayan equivocado los capullos estos otra vez con lo de km y millas..., o como no hayan tenido en cuenta el efecto de Coriolis...
No te comas todas las uñas, que luego duelen al jugar al Track & Field
Quark14/1/2005, 11:45
6.51 Timer triggers power-up of onboard electronics Triggered by a pre-set timer, Huygens's onboard electronics power up and the transmitter is set into low-power mode, awaiting the start of transmission.
11.13 Huygens reaches 'interface altitude' The 'interface altitude' is defined as 1270 kilometres above the surface of the moon where entry into Titan's atmosphere takes place.
11.17 Pilot parachute deploys The parachute deploys when Huygens detects that it has slowed to 400 metres per second, at about 180 kilometres above Titan's surface. The pilot parachute is the probe's smallest, only 2.6 metres in diameter. Its sole purpose is to pull off the probe's rear cover, which protected Huygens from the frictional heat of entry.
2.5 seconds after the pilot parachute is deployed, the rear cover is released and the pilot parachute is pulled away. The main parachute, which is 8.3 metres in diameter, unfurls. 11.18 Huygens begins transmitting to Cassini and front shield released At about 160 kilometres above the surface, the front shield is released.
42 seconds after the pilot parachute is deployed, inlet ports are opened up for the Gas Chromatograph Mass Spectrometer and Aerosol Collector Pyrolyser instruments, and booms are extended to expose the Huygens Atmospheric Structure Instruments.
The Descent Imager/Spectral Radiometer will capture its first panorama, and it will continue capturing images and spectral data throughout the descent. The Surface Science Package will also be switched on, measuring atmospheric properties.
11.32 Main parachute separates and drogue parachute deploys The drogue parachute is 3 metres in diameter. At this level in the atmosphere, about 125 kilometres in altitude, the large main parachute would slow Huygens down so much that the batteries would not last for the entire descent to the surface. The drogue parachute will allow it to descend at the right pace to gather the maximum amount of data.
11.49 Surface proximity sensor activated Until this point, all of Huygens's actions have been based on clock timers. At a height of 60 kilometres, it will be able to detect its own altitude using a pair of radar altimeters, which will be able to measure the exact distance to the surface. The probe will constantly monitor its spin rate and altitude and feed this information to the science instruments. All times after this are approximate.
12.57 Gas Chromatograph Mass Spectrometer begins sampling atmosphere This is the last of Huygens's instruments to be activated fully. The descent is expected to take 137 minutes in total, plus or minus 15 minutes. Throughout its descent, the spacecraft will continue to spin at a rate of between 1 and 20 rotations per minute, allowing the camera and other instruments to see the entire panorama around the descending spacecraft.
13.30 Descent Imager/Spectral Radiometer lamp turned on Close to the surface, Huygens's camera instrument will turn on a light. The light is particularly important for the 'Spectral Radiometer' part of the instrument to determine the composition of Titan's surface accurately.
13.34 Surface touchdown This time may vary by plus or minus 15 minutes depending on how Titan's atmosphere and winds affect Huygens's parachuting descent. Huygens will hit the surface at a speed of 5-6 metres per second. Huygens could land on a hard surface of rock or ice or possibly land on an ethane sea. In either case, Huygens's Surface Science Package is designed to capture every piece of information about the surface that can be determined in the three remaining minutes that Huygens is designed to survive after landing.
15.44 Cassini stops collecting data Huygens's landing site drops below Titan's horizon as seen by Cassini and the orbiter stops collecting data. Cassini will listen for Huygens's signal as long as there is the slightest possibility that it can be detected. Once Huygens's landing site disappears below the horizon, there's no more chance of signal, and Huygens's work is finished.
16.14 First data sent to Earth Cassini first turns its high-gain antenna to point towards Earth and then sends the first packet of data.
Getting data from Cassini to Earth is now routine, but for the Huygens mission, additional safeguards are put in place to make sure that none of Huygens's data are lost. Giant radio antennas around the world will listen for Cassini as the orbiter relays repeated copies of Huygens data.
BUBU ;-)14/1/2005, 12:06
Jiji, pero eso es lo que está previsto, Quark, veremos a ver si se cumple...
Quark14/1/2005, 12:12
uf, no se... :alienff:
Quark14/1/2005, 15:42
De momento han acertado de lleno ^_^
Quark14/1/2005, 22:55
Weeeenoooo todo un exito :woot: habra vida en titan??? :alienff:
chaterer14/1/2005, 23:30
A ver si saca alguien ahora la manera de hacerse un telescopio con aglomerado y cristales invertidos etc :) juasjuas Ya estoy viendo el tutorial El Teleskopio de ... :) (a mi me gusta tambien pero no dispongo de ello)
BUBU ;-)15/1/2005, 00:12
No sé por qué, pero tengo la pesimista sensación de que ahí no habrá ni el más mínimo atisbo de vida, ni siquiera bacteriana. Y que yo estoy seguro que no llegaré a verlo... Es que yo los descubrimientos tan fantásticos que ocurren de un día para otro no me las creo... Ya sé que estoy siendo anticarlsaganiano, pero es lo que siento, para mi desgracia...
Quark15/1/2005, 01:14
Carl Sagan es un dios pa mi, no te metas con el que te doy con el palo del dolor :P
BUBU ;-)15/1/2005, 01:18
El pobre vivió demasiado ilusionado con el tema de encontrar vida. Es lo que pasa por ser tan optimista, jeje.
Quark15/1/2005, 01:23
El exactamente no es que fuese un iluso, pues basaba su punto de vista en estadisticas reales, pero con el nivel tecnologico que tenemos ahora, que hasta hace dos dias no se han enterado de que existe otro planeta en el sistema solar, y ej que es mas grande que Jupiter... hay que ver... es como hacer fotografias a una montaña desde kilometros de distancias, ves que hay arboles pero no tienes ni puta idea de que tipo son ni si hay hormigas :P
BUBU ;-)15/1/2005, 01:38
Ein? ¿Que se ha descubierto otro planeta y que es más grande que Júpiter? Enga ya, home...
Quark15/1/2005, 01:58
Sip, en el cinturon de kuiper, no saben si clasificarlo de planeta o de mega-asteroide
Oye, las fotos en color son en realidad en blanco y negro pero procesadas por el.. digamos... PhotoShop de la NASA, ¿no?
snopes15/1/2005, 16:10
hutia... parece que hay como ríos o torrenteras ¿no?
eso blanco es... ¿hielo?
Quark15/1/2005, 16:54
Sip bubu, sera un sistema a lo bestia para convertir los pixeles segun cada tonalidad del gris del pixel a color indexado. Y desde luego parece una luna muy interesante y con muchas posibilidades de dar sorpresas, lastima que la mision sea tan limitada :(
Jiji, yo no es por ser poco romántico, peeeero... ¿cómo que la sonda no para de enviar datos? Yo tenía entendido que tras años de viaje, una vez aterrizado la cantidad de minutos emitiendo datos era de 5 (5 minutos, vaya), lo cual no deja de ser una proeza apoteósica, pero eso de que "sigue enviando información". Ota cosa, el eterno tema del agua. Por lo que leo, se ven RESTOS erosivos. Y de metano (CH4). De islas, mares, ríos, etc, nasti de plasti.
No quiero ser el llorón ni el pesimista del grupo, pero sí que no me dejo impresionar por la prensa amarilla cósmica, jiji.
Bueno, a lo mejor hasta hay vida y tó, jiji
Quark22/1/2005, 03:30
21 January 2005 ESA PR 05-2005. On 14 January ESA's Huygens probe made an historic first ever descent to the surface of Titan, 1.2 billion kilometres from Earth and the largest of Saturn's moons. Huygens travelled to Titan as part of the joint ESA/NASA/ASI Cassini-Huygens mission. Starting at about 150 kilometres altitude, six multi-function instruments on board Huygens recorded data during the descent and on the surface. The first scientific assessments of Huygens' data were presented during a press conference at ESA head office in Paris on 21 January.
"We now have the key to understanding what shapes Titan's landscape," said Dr Martin Tomasko, Principal Investigator for the Descent Imager-Spectral Radiometer (DISR), adding: "Geological evidence for precipitation, erosion, mechanical abrasion and other fluvial activity says that the physical processes shaping Titan are much the same as those shaping Earth."
"Islands in the stream"... possible 'islands' on a dark plain Spectacular images captured by the DISR reveal that Titan has extraordinarily Earth-like meteorology and geology. Images have shown a complex network of narrow drainage channels running from brighter highlands to lower, flatter, dark regions. These channels merge into river systems running into lakebeds featuring offshore 'islands' and 'shoals' remarkably similar to those on Earth.
Data provided in part by the Gas Chromatograph and Mass Spectrometer (GCMS) and Surface Science Package (SSP) support Dr Tomasko's conclusions. Huygens' data provide strong evidence for liquids flowing on Titan. However, the fluid involved is methane, a simple organic compound that can exist as a liquid or gas at Titan's sub-170°C temperatures, rather than water as on Earth.
Titan's rivers and lakes appear dry at the moment, but rain may have occurred not long ago.
Deceleration and penetration data provided by the SSP indicate that the material beneath the surface's crust has the consistency of loose sand, possibly the result of methane rain falling on the surface over eons, or the wicking of liquids from below towards the surface.
Two new Titan features - water ice and methane springs
Heat generated by Huygens warmed the soil beneath the probe and both the GCMS and SSP detected bursts of methane gas boiled out of surface material, reinforcing methane's principal role in Titan's geology and atmospheric meteorology -- forming clouds and precipitation that erodes and abrades the surface.
In addition, DISR surface images show small rounded pebbles in a dry riverbed. Spectra measurements (colour) are consistent with a composition of dirty water ice rather than silicate rocks. However, these are rock-like solid at Titan's temperatures.
Titan's soil appears to consist at least in part of precipitated deposits of the organic haze that shrouds the planet. This dark material settles out of the atmosphere. When washed off high elevations by methane rain, it concentrates at the bottom of the drainage channels and riverbeds contributing to the dark areas seen in DISR images.
New, stunning evidence based on finding atmospheric argon 40 indicates that Titan has experienced volcanic activity generating not lava, as on Earth, but water ice and ammonia.
Titan landing site seen from Cassini Thus, while many of Earth's familiar geophysical processes occur on Titan, the chemistry involved is quite different. Instead of liquid water, Titan has liquid methane. Instead of silicate rocks, Titan has frozen water ice. Instead of dirt, Titan has hydrocarbon particles settling out of the atmosphere, and instead of lava, Titanian volcanoes spew very cold ice.
Titan is an extraordinary world having Earth-like geophysical processes operating on exotic materials in very alien conditions.
Panel of scientists presenting Huygens results
"We are really extremely excited about these results. The scientists have worked tirelessly for the whole week because the data they have received from Huygens are so thrilling. This is only the beginning, these data will live for many years to come and they will keep the scientists very very busy", said Jean-Pierre Lebreton, ESA's Huygens Project Scientist and Mission manager.
The Cassini-Huygens mission is a cooperation between NASA, ESA and ASI, the Italian space agency. The Jet Propulsion Laboratory (JPL), a division of the California Institute of Technology in Pasadena, is managing the mission for NASA's Office of Space Science, Washington DC. JPL designed, developed and assembled the Cassini orbiter while ESA operated the Huygens atmospheric probe.