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Οι πραγματικές ηλικίες των κβάζαρ και των γαλαξιών
petrosccd απάντησε στην συζήτηση του/της k_astrophotographer σε Αστρονομία, Αστροφυσική και Κοσμολογία
Kosta, To ksereis oti bebaia symfono mazi sou kai stin Ellada ontos exei pareksigithei o oros erasitexnis astronomos... Alla as min eimaste toso skliropirinikoi! Thelo na po oti kalo einai kaneis na kanei akoma kai stargazing kai astrofotografisi -me tin enasxolisi tou auti kati mathenei gia ton ourano kai to sympan... Ostoso, safos yparxei problima me tous syllogous giati proballoun mono auti tin drastiriotita san erasitexniki astronomia! Kai xeirotera, kapoioi syllogoi proballoun oti kanoun "sobari" erasitexniki astronomia -kai eno i moni tous drastiriotita einai to stargazing. Auto nomizo einai to pio epikyndino giati mpairdeuei kai eisagei lathemenes entyposeis... Petros -
Eisai sigouros oti den pernei moteraki stin orthi anafora? Gia elenkse to, poly pithanon na yparxai kapio aksonaki kalymeno me kapio plastiko... An den eisai sigouros rota ekei pou to pires na sou poun an pernei kai ti pernei. Pantos xoris moter den mporeis na kaneis CCD! To mono efykto einai planites me euaisthiti video-kamera or web-cam, giati den xreiazontai megales ektheseis kai afou i basi einai isimerini eukola tous kratas sto pedio me to xeri... Petros
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To tileskopio sou den exei astrostati (diladi moter pou akolouthei tin kinisi tou ouranou)?? An den exei tote dyskola kaneis CCD! Den ksero to montelo tou tileskopiou pou exeis kai an mporeis na prosarmoseis moter, alla i akribeis odigisi einai aparaititi. Yparxei methodos gia na parei kaneis eikones kai me akinito to tileskopio -xoris moterakia (legetai: Drift Scan, TDI, or Track and Accumulate), alla thelei empeiria kai gnosi tou antikeimenou gia na tin efarmoseis! Epipleon prepei kai to logismiko kai i kamera na mporoun na tin doulepsoun -den ksero an i MX5 mporei... Telos panton, den synistatai! Ara: xoris moterakia kai systima odigisis pou na exei kali akribeia ksexase to CCD! Petros
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Kosta, Oxi den snomparo katholou! Symfono oti gia ta lefta tis einai poly kali... Aplos ekana tin diapistosi oti me to budget pou thetei ousiastika den mporei na parei kati allo (entaksi yparxoun kai oi MEADE, alla kalytera as tis apofygei). Ara kai ego MX-5 tou protino an diathetei mono 1000 Euro! Alla as mas pei ti ton endiaferei na kanei me tin CCD gia na tou po an i MX-5 tha einai arketi... Petros
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Οι πραγματικές ηλικίες των κβάζαρ και των γαλαξιών
petrosccd απάντησε στην συζήτηση του/της k_astrophotographer σε Αστρονομία, Αστροφυσική και Κοσμολογία
Dimitri, Symfono mazi sou 100%, auto einai to thema pou o perisoteros kosmos den syniditopoiei, oti diladi kai i theoria periexei paratirisi kai i paratirisi theoria! Px ta fasmata pou anefera se proigoumeno post, thes gnosi optikis theorias gia na ta katanoiseis -an sou petakso ena fasma etsi xoris na sou po apo ti organo bgike (me prisma, me fragma, grism, klp) den mporeis na katalabeis tipota... Omos kai i theoria prepei na syniditopoiisoume oti prokeitai gia ektimisi tou pos o kosmos -or ena fainomeno- leitourgei me basi aples arxes. Den einai kati apolyto (oute mporoume na gnorizoume an einai olokliromeni)... Exei de to xaraktiristiko oti mporei na leitourgei san "lastixo", giati otan yparxoun pragmata pou den eksigei teinoume na: a) ta bazoume kato apo to xalaki kai prospioumaste oti den yparxoun, b) kanoume mpalomata para na paradexomaste oti yparxei problima... Opoios endiaferetai gia tetoia themata mporei na riksei mia matia sto "Istoria tis Fysikis" tou Emilio Segre, an kai einai poly theoritiko biblio, me orous filosofias -an thymamai kala giati to eixa diabasei prin arketa xronia (nomizo to exei metafrasei o Mpaltas)... Tora gia to thema paratirisiakis kosmologias apo erasitexnes, sigoura einai dyskolo, alla den prepei na eimaste apolytoi! As min ksexname to ROTSE pou kategrapse GRB (Gamma-Ray Burst) 8mag!! Profanos kaneis tha mporouse na to dei kai me kyalia!!! Me sxetika megala tileskopia kai CCD kaneis mporei na kanei pleon douleia pou prin 10 xronia ekanan mono oi epagkelmaties! Me ena 10/12-inch kai kali CCD to 20-mag einai efykto me merika lepta ekthesi, opote kaneis paizei kai se supernovae se makrynous galaxies kai se ereuna gia optika antistoixa ton GRB kai endexomenos kai se alla antistoixa project... Petros -
Eksartatai... Ti akribos thes na kaneis me to CCD? Me ta xrimata ostoso pou diatheteis mono kamia MX-5 perneis! Petros
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Οι πραγματικές ηλικίες των κβάζαρ και των γαλαξιών
petrosccd απάντησε στην συζήτηση του/της k_astrophotographer σε Αστρονομία, Αστροφυσική και Κοσμολογία
Giorgo, Eixa skopo na nim apantiso, theorontas oti se eixa pareksigisei, alla i teleutaia sou apantisi apodeiknyei oti pragmatika exeis tin entyposi oti i theoria einai simantikoteri tis paratirisis stin kosmologia kai stin astrophysiki. Den ksero ti paper esi diabazeis, alla auto safestata kai einai analythes! Les oti i paratirisi xoris theoria einai axristi! To akribos antitheto, mia paratirisi panta exei to noima tis aneksartitos theorias. An px kapoios kanei paratiriseis fasmaton supernovae, autes oi paratiriseis isxioun os exoun eite isxyei i sxetikotita eite oxi -aplos i ermineia tous endexomenos allazei! Pos einai dynaton na apaksieis tin paratirisi i opoia tha elenksei tis problepseis tin theorias kai otan tha brei to lathos tha deiksei to dromo gia tin nea theoria? O mixanismos pou emeis oi fysikoi douleuoume (an kai stin Ellada yparxei i pseudeis entyposi oti kathomaste kato apo to dentro kai mas erxontai theories stin kouroupa -logo pantelous elipsis peiramatikis diadikasias apo to sxoleio os to panepistimio) einai auti pou deixno sximatika: peirama -----> theoria ^--------------/ Kai to peirama kathorizetai apo tin theoria alla kai i theoria apo to peirama. Den yparxei ierarxia os pros to ti einai pio spoudaio, oute auto eksartatai apo to se ti stadio brisketai i epistimi. Epeidi akribos yparxei auti i steni sxesi peiramatos-theorias, oi anakalypseis ginontai mono otan anaibei i texniki stathmi oste na exoume nea dedomena. To oti i theoria tis sxetikotitas kai i kbantofysiki irthan stis arxes tou proigoumenou aiona den einai tyxaio! As min dynoume loipon perisoteri simasia stin theoria apo oti tis aksizei (alla oute kai ligoteri), giati den einai tipote allo apo mia ektimisi tou pos o kosmos douleuei me basei tis os tora paratiriseis mas. Petros [ 13 Ιουνίου 2002: Το μήνυμα τροποποιήθηκε από: petrosccd ] -
Οι πραγματικές ηλικίες των κβάζαρ και των γαλαξιών
petrosccd απάντησε στην συζήτηση του/της k_astrophotographer σε Αστρονομία, Αστροφυσική και Κοσμολογία
Giorgo, H frasi sou itan: "Pantws den prepei na ypoba8mizoume to rolo ths fysikhs kai tis kosmologias me ta antistoixa 8ewrhtika montela pou proteinoun, giati h astronomikh parathrhsh apo monh ths einai anikanh na dwsei apanthseis se tetoiou eidous erwthmata." Diladi tha prepei na apodektoume kapoia theoritika montela xoris krisi me basei ta paratirisiaka dedomena?? An einai etsi, ego epilego opos kai o Einstain "Steady State" -oxi "Big Bang"... Deuteron auto pou les gia ti Geniki Sxetikotita den einai sosto, i theoria eprepe na epibebaionei ta paratirisiaka dedomena, diladi tis troxies ton planiton kai eidika tin metaptosi tou peri-iliou tou Ermi. Eidika to gegonos oti ypologize sosta tin troxia tou Ermi einai o logos pou a) o Einstain tin dimosieuse kai b) pou i ypoloipi epistimoniki koinotita asxolithike sobara! Petros -
Οι πραγματικές ηλικίες των κβάζαρ και των γαλαξιών
petrosccd απάντησε στην συζήτηση του/της k_astrophotographer σε Αστρονομία, Αστροφυσική και Κοσμολογία
Giorgo, Se sxesi me to proigoumeno sxolio sou oti i paratirisi den mporei na dosei apantiseis, epeidi milame gia physiki, i physiki ginetai meso dedomenon ara paratirisis -den einai filosofia! Allios den milame gia epistimi, giati i epistimi basizetai stin paratirisi gia tin paragogi tis theorias kai tin epalitheusi i diapseusi tis. Bebaia i theoritikoi polles fores paragoun theories me tin elpida oti mporei na tous katsei kai na piasoun to jack-pot, ego den to theoro auto epistimi, alla ola mesa sto paixnidi einai... Se sxesi me to thema tis ilikias tou sympantos basika oi omades einai treis: tou Harvard (High-Z team), Berkeley (mazi legontai Supernova Cosmology Project) kai Key Project (Hubble Institute). Basika to problima ksekinise arxika me tis omeds supernova pou edinan poly mikroteres ilikies apo autes pou eixan ypologistei gia astra se globular clusters. To Key Project itan i prospatheia na lythei to problima me paratiriseis Cepheids stous 20 pio kontinous galaxies... Ostoso an kai ta apotelesmata apo oles autes tis omades den symfonoun akribos, i lisi sto problima tis ilikias ton astron irthe apo ton Hipparxo, me apeutheias metrisi ton apostaseon ton Cepheids kai ton astrikon sminon. Telika ta sminoi itan pio makria apo oti ypologizotan me basei ta H-R diagrmata, opote telika einai neotera (14-15 dis xronia). Edo blepoume tin anagki apeutheias paratirisis me oso ginetai ligoteres ypotheseis meso theorias, allios exoume ektimiseis me megala sfalmata! Aksizei na rikseis mia matia sta site ton supernova omadon kai ton Hipparxo: http://cfa-www.harvard.edu/cfa/oir/Research/supernova/HighZ.html http://www-supernova.lbl.gov/ http://ucsu.colorado.edu/~lisle/frames.html Ostoso, epeidi se oles tis metriseis otan milame gia kosmologia mpainoun para polles parametroi oi opoies den elenxontai pliros kai polles ypotheseis sta theoritika montela aksizei na exoume sto myalo mas to sxolio tou High-Z team: "As mentioned earlier, we are one of two groups working on this project, and we have arrived, using different data, to almost identical conclusions at the same time, without knowledge of each other's results. The above diagrams show both teams data (they are the Supernova Cosmology Project). But just because we get the same answer does not mean we are both right, we could both be being fooled by our supernovae in the same way. Or maybe our whole cosmological model is flawed. So our observations may really mean one of three things: The Exciting: the Universe is accelerating. The Universe is accelerated by some unknown type of matter that is spread throughout the Cosmos. The Heretical: General Relativity is as sacred as anything in Physics, but it may be wrong. Since our work is comparing the predictions of General Relativity with observations, if General Relativity is wrong, so are our conclusions. The Mundane (at least from our point of view): We are simply wrong and have been fooled by Supernovae into believing the Universe is accelerating. Maybe supernovae are fainter in the past, and therefore look further away. We hope and believe it is the first alternative, but we have to work hard and test to see if it isn't the second or third alternative. Checking these two other alternatives is a major focus of our current work" -
To parakato isos endiaferei... Deixnei ti dynatoties mporei na exei o erasitexnis akoma kai stin simerini epoxi pou tileskopia mikrotera apo 4m theorountai "mikra"! Petros ------------------------------------------------ http://skyandtelescope.com/news/current/article_627_1.asp Backyard Search for Asteroids and Extrasolar Planets By David L. Chandler Sky & Telescope June 7, 2002 An ingenious arrangement of three homebuilt 14-inch telescopes on fixed mountings is enabling Tucson-based amateur astronomer Roy Tucker to conduct a backyard hunt for asteroids whose quality is on par with the best professional searches in the world. Tucker, an instrumentation engineer at the National Optical Astronomy Observatory (NOAO), completed his new telescope setup last April. The fixed mountings made the whole construction far less expensive than any telescope set up on a normal, steerable mount. Tucker's fixed telescopes scan the sky as the Earth turns and reach a limiting magnitude of 20.5 - fainter than most professional asteroid searches. And thanks to a cleverly designed bimetallic (steel and aluminum) framework that automatically compensates for temperature changes, the telescope can run unattended all night with no need for focus adjustments. The three telescopes are arranged so that they produce sequential image triplets that can be compared to reveal any moving objects. Since his earlier searches began in 1998 (Sky & Telescope: March 1999, page 76), Tucker has detected 4,812 asteroids, several hundred of which were new discoveries. He presented his latest results in a poster at the Albuquerque AAS meeting. Now, with the help of a nonprofit organization of amateur and professional astronomers called GNAT (Global Network of Astronomical Telescopes), he hopes to expand the system, which initially cost him just $12,000, into a globe-spanning network of 48 telescopes to provide 24-hour-a-day time coverage. GNAT is seeking involvement by universities, small colleges, schools, and serious amateurs. Such a network should make it possible not only to discover many more asteroids, but also to do precise photometric searches for supernovae, variable stars, and even extrasolar planet transits, says Tucker. Roger Culver, an astronomer at Colorado State University and one of GNAT's organizers, says this is "a chance to really bring small telescopes back to the fore and really do some interesting things." [ 09 Ιουνίου 2002: Το μήνυμα τροποποιήθηκε από: petrosccd ]
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Οι πραγματικές ηλικίες των κβάζαρ και των γαλαξιών
petrosccd απάντησε στην συζήτηση του/της k_astrophotographer σε Αστρονομία, Αστροφυσική και Κοσμολογία
Kosta, Se auto pou rotas an asxolountai paratirisiaka i apantisi einai ousiastika auti pou sou edosa: i proti methodos itan me tin metrisi ton ilikion ton asteron opou brethikan asteres me ilikies 18-20 dis xronia kai i deuteri pio synxroni methodos einai auti tis xrisis supernova, opou prospathei na sysxetisei red-shift me lamprotita supernova gia na bgei i stahera tou Hubble pou dinei apostasi me red-shift... Ostoso auti i methodos dinei 6-7 dis xronia ilikia gia to sympan pou erxetai se antithesi me tin proti! To Key Project prospathise na kanei metriseis apostasis me Kifides, alla ta pragmata den pigan kai poly kala -eno i methodos douleuei mono gia poly kontinous galaxies. Ara ontos yparxei paratirisiaki douleia pano sto antikeimeno... Gia auto malista to logo exei megali simasia i euresi supernova a) kata to stadio tis auksisis tis lamprotitas tous kai b) se galaxies me megalo red-shift kai ara makrinous kai amydrous (ara megalo tileskopio +kali CCD). Petros -
starfinder equatorial kai astrofotografia
petrosccd απάντησε στην συζήτηση του/της Nakis σε Εξοπλισμός για αστροφωτογράφηση
Kala re Naki, auto den einai ligo off-topic?? Gia na min enoxloume ton ypoloipo kosmo me asxeta, exei to simataki me to fakelaki, pou mporeis na steileis email se kapoion! Pantos den exo idea gia auto pou les... Petros! -
starfinder equatorial kai astrofotografia
petrosccd απάντησε στην συζήτηση του/της Nakis σε Εξοπλισμός για αστροφωτογράφηση
Naki, To na ertho Kitherona or Parnona, apokleietai mia kai eimai stin Agglia! Deuteron tetoiou typou "eksormiseis" tis theoro askopes (gia sena pou eisai neos sto spor bebaia einai xrisimo na deis kai alla tileskopia kai na miliseis me pio "empeirous" paratirites) alla re paidia o M51 den exei fygei apo tin thesi tou!!! Oute fainetai diaforetikos! Kai nai ontos, ego eimai pou eixa ftiaksei diafores CCD... Petros! -
starfinder equatorial kai astrofotografia
petrosccd απάντησε στην συζήτηση του/της Nakis σε Εξοπλισμός για αστροφωτογράφηση
Naki, Tote nomizo oti ontos i symbouli pou sou edosa itan i sosti: mathe prota na douleueis me tin psifiaki eikona, kathorise tous stoxous sou kai meta blepeis gia CCD. Kai me tin CCD thes mazi sou ypologisti opos kai me tin web-cam -kai me tin CCD pali thes epeksergasia eikonas kai malista pio polyploki... Deuteron an ksekiniseis na douleueis, tote tha deis kai ti se endiaferei na kaneis kai tote mporeis na deis kai ti CCD thes pio eukola (opos panta, opos den yparxei tileskopio gia oles tis douleies -etsi den yparxei kai CCD gia oles tis douleies). Gia ta moterakia ego pantos den ksero na sou po... Pantos an dokimaseis tin web-cam gia planites (profanos den mporeis na kaneis kai kati allo) tote mporeis na exeis kala apotelesmata akoma kai xoris odigisi -apla i douleia ginetai ligotero paragogiki... Tora, min treleneste gia to M57, einai foteino kai mikro -diladi me megali epifaniaki lamprotita kai fainetai poly eukola kai me mikra tileskopia kai apo tin Athina! Petros! -
starfinder equatorial kai astrofotografia
petrosccd απάντησε στην συζήτηση του/της Nakis σε Εξοπλισμός για αστροφωτογράφηση
Naki, Oxi den einai kali idea i agora enxromis CCD, giati ousiastika apokleietai sto mellon na mporeis na tin xrisimopiiseis gia sobari ergasia, opos px astrometria, or fotometria. Ama einai an doseis ta lefta kalytera einai na pareis mia kali kamera pou mporei na xrisimopiithei kai gia kati perissotero apo pretty-pictures! Etsi kai allios akoma kai gia auto mia monoxromi me filtra einai kalyteri... Exeis skeftei katholou na peiramatisteis me web-cam?? Sou exo dosei kapoia link. Ta eides katholou? Nomizo oti gia sena tha einai i kalyteri lisi na pareis kamia Vesta Pro Web-Cam pou exei to idio CCD tsip me tis enxromes Starlight pou les kai na peiramatiteis, prin ksodepseis mia periousia gia CCD... Petros [ 03 Ιουνίου 2002: Το μήνυμα τροποποιήθηκε από: petrosccd ] -
starfinder equatorial kai astrofotografia
petrosccd απάντησε στην συζήτηση του/της Nakis σε Εξοπλισμός για αστροφωτογράφηση
Nai nomizo kai i MX516 douleuei san autoguider, malista mporei na doulepsei san autoguider kai na pernei kai eikona tautoxrona! Symboulepsou omos to site tis Starlight gia na deis an douleuei autoguider stand-alone (xoris to PC)... Tora ti sygkekrimeni kamera tis MEADE pou anafereis ego safos den stin synisto, to TC255 CCD chip pou xrisimopoiei einai kakis poiotitas! Episis, i teliki timi tha einai megalyteri apo auti tis Starlight (350.000drx) i opoia einai arketa kalyteri! Tora an den thes Starlight giati den koitas tin ST-237 tis SBIG pou einai poly kalyteri alla kai pio akribi ($1300 ara na ypologizeis gyro stis 650.000drx teliki)? Petros [ 28 Μαϊου 2002: Το μήνυμα τροποποιήθηκε από: petrosccd ] -
starfinder equatorial kai astrofotografia
petrosccd απάντησε στην συζήτηση του/της Nakis σε Εξοπλισμός για αστροφωτογράφηση
Gia tis Starlight des edo: http://www.starlight-xpress.co.uk/ H timi tis MX516 prepei na einai gyro sta 1000 Euro (min dianoithei kaneis na skeftei oti tha parei CCD tis prokopis me ligotera)... Tora mou les gia to xarti tou Milona se greeklish... Kapoios prepei na ton pliroforisei oti tetoies douleies theloun poly perisoteri sobarotita, den ginetai ta misa na einai se Agglika kai ta ypoloipa akompses authileksi metafraseis kai na omiloume peri Ellinikou xarti! Petros! -
starfinder equatorial kai astrofotografia
petrosccd απάντησε στην συζήτηση του/της Nakis σε Εξοπλισμός για αστροφωτογράφηση
Naki, O Magkelanos pou les, sto ksanaleo den exei KAMIA sxesi me astrofotografisi! Exei dio encoders kai apla sou deixnei pou briskese ston ourano se orthi anafora kai apoklisi... or se boitha na breis antikeimena deixnontas sou poso apexoun apo to simeio pou koitas (opote kounas me to xeri to tileskopio mexri na deixnei peripou miden kai tote to antikeimeno prepei na einai konta sto kentro tou pediou). Auto kanei! KAMIA sxesi me fotografisi... Tora gia ta MEADE CCDs kalo einai na ta apofeigeis, exo milisei me pollous pou eixan tin atyxia na paroun ena kai oi perisoteres syskeues den douleuoun katholou (diladi agorazeis ena sketo kouti)! Endexomenos na ta exoun kalitereusei, alla gia CCD tis prokopis safos oi etairies einai Apogee, SBIG kai Starlight -i MX516 safos prepei na aksizei ta lefta tis... Petros -
starfinder equatorial kai astrofotografia
petrosccd απάντησε στην συζήτηση του/της Nakis σε Εξοπλισμός για αστροφωτογράφηση
Naki, Genika stin astrofotografia xreiazontai megales ektheseis tis takseos ton 30 lepton, polles fores kai megalyteres... Gia tetoies ektheseis kanena tlieskopio den mporei na akolouthisei tin kinisi ton astron me akribeia arcsec pou apaiteitai. Gia auto to logo synithos fortonetai sto plai ena mikrotero tileskopio sto opoio kentraroume ena astro dipla sto stoxo mas kai me mirkodiorthoseis sta moter to kratame pano sto stauronyma pou prepei na exei to prosofthalmio tou mikrou tileskopiou. Den exo xrisimopiisei pote Starfinder opote den ksero an exei tetoies diorthoseis to tileskopio sou. Pantos to keypad pou elenxeis ta moter prepei na exei koumpia pou kanoun to tilskopio na trexei pio grigora kai pio arga (se orthi anafora), kai kiniseis pano-kato (Apoklisi), me auta ginontai i diorthoseis! Synithos to megalytero problima stin astrofotografisi einai to periodiko sfalma pou eisagei o atermonas. Tileskopia pou sxediazontai gia astrofotografisi exoun PEC (Periodic Error Correction) sto moter tis orthis anaforas... Ta Starfinder ontos den exoun sxediastei gia tetoia douleia -pio poly gia optiki paratirisi alla isos mporeis na kaneis kati. Ego tha sou proteina perisotero na asxolitheis me fotografisi planiton eite me video eite me web-cam (exo dei pragmatika ekpliktika apotelesmata). O epipleon eksoplismos einai poly ligos kai to kostos poly mikro (mia kali web-cam kanei ~100 Euro). Des edo gia plirofories sxetika: http://www.astrocam.org/english.htm http://www.astrabio.demon.co.uk/QCUIAG/ (sto deutero link kane click ekei pou leei Members' Choice Images gia na patheis plaka!) Petros -
ΘΕΣΗ ΠΑΡΑΤΗΡΗΣΗΣ ΚΑΙ CCD
petrosccd απάντησε στην συζήτηση του/της dtsitom σε Εξοπλισμός για αστροφωτογράφηση
Dionisi, Kala to oti eisai neos sto athlyma to katalaba apo tin erotisi pou ekanes, alla opos ksereis den yparxoun xazes erotiseis -mono apantiseis! H symbouli mou einai min parasyrese apo to ti blepeis kai ksekina siga-siga na matheis na briskeis antikeimena ston ourano monos sou! Robotika tileskopia yparxoun, alla i xrisimotita tous den einai sto na ginetai aneti paratirisi... Einai epistimonika organa pou kostizoun para polla lefta! Kai profanos yparxei megali diafora apo to na elenxeis ena tileskopio apo 10-20m makria kai polles 100ades Km. Tora analoga to ti thes na kaneis, mporei kati tetoio na sou einai xrisimo i oxi. Stin parousa fasi sigoura oxi! Safestata otan kaneis astronomia kathara san hobby, i megaliteri euxaristisi einai na ksereis ton ourano kai na mporeis na breis monos sou antikeimena. To na patas ena koumpi kai to tileskopio meta apo ligo na sou bgazei mia eikona se ena monitor toulaxiston emena prosopika den tha mou elege tipota... An omos kaneis kanei sobari astronomiki ergasia (akoma kai san erasitexnis) tote ta pragmata allazoun giati i automatopoiisi kanei ta pragmata pio apodotika. Petros -
starfinder equatorial kai astrofotografia
petrosccd απάντησε στην συζήτηση του/της Nakis σε Εξοπλισμός για αστροφωτογράφηση
Naki, Oxi gia astrofotografisi den xreiazesai to Magkelano pou einai mono gia na briskeis antikeimena ston ourano... Gia astrofotografisi xreiazesai basika ena astrostati (pou exei to modelo pou anafereis), kalo prosanatolismo tis isimerinis basis kai kapoio tropo gia na kaneis mikrodiorthoseis -synithos ena deutero mikro tileskopio pou blepei kapoio astro konta sto simeio pou fotografizeis. Elpizo na boithisa... -
GOTO & TRACKING σε EQUATORIAL MOUNT
petrosccd απάντησε στην συζήτηση του/της dtsitom σε Στηρίξεις τηλεσκοπίων
Bre Dionisi, Giati den xalas ta lefta sou na pareis ena tileskopio tis prokopis -esto xoris moter, px Dob, na matheis kai ton ourano... para na psaxneis na baleis GOTO sto 4.5" Bushnell?? Petros -
ΘΕΣΗ ΠΑΡΑΤΗΡΗΣΗΣ ΚΑΙ CCD
petrosccd απάντησε στην συζήτηση του/της dtsitom σε Εξοπλισμός για αστροφωτογράφηση
Dionisi, Ola ta tileskopia tha fernoun to prosothalmio se ligo aboli thesi, se kapoio simeio paratiriseis. Me ti germaniki basi kai Newton tileskopio ta pragmata den einai kai toso tragika, spania exeis dyskoles thesies mia pou gia kathe simeio tou ouranou yparxoun dio prosanatolismoi pou blepeis to idio antikeimeno -me peristrofi 180 moires se RA kai DEC metaksi tous- ara an o enas prosanatolismos fernei to prosoflalmio na koita pros to edafos, o allos to fernei na koita pros ta pano (opote einai pio aneti i thesi paratirisis)... Tora to thema pou theteis me ti videokamera kai to CCD einai entelos ksekarfoto! Ypo tin enoia oti: a) i videokamera den einai arketa euaisthiti oste na antikatastisei to mati sou -mono planites mporei na katagrapsei... Eno, to na blepeis tin eikona tou planiti se monitor den exei kamia sxesi, apo apopsi poiotitas, se sxesi me auto pou blepeis me to mati! Eno kai tote mallon kaneis tha ebaze ena frame grabber kai tha katebaze ston ypologisti eikones gia na tis athroisei kai na bgalei kali eikona... Profanos katalabes oti auto pou proteineis den exei noima! b) to na baleis CCD, einai san na les na kaneis astrofotografisi gia na kaneis paratirisi ksekourasta! To CCD einai epistimoniko ergaleio (me antistoixi timi), eno i xrisi tou einai kathe allo para ksekourasti, mia pou apaiteitai na koubalas mazi sou arketo eksoplismo opos ypologisti, kalodia, trofodotika, mpataries endexomenos klp... Alla kai pali to CCD den mporei na ypokatastisei se kamia periptosi tin amesotita tis optikis paratirisis. Afou apaiteitai xronos ekthesis (opos me tin fotografia), xronos gia download tis eikonas kai meta arketa lepta os kai ores epeksergasias (gia na paraxthei i eikona pou blepeis sta periodika)! Petros! -
Φωτογραφιες απο την πλανητικη συνοδο
petrosccd απάντησε στην συζήτηση του/της vossinakis σε Παρατήρηση Πλανητών
Se poia perioxi einai? Petros -
Απόψεις περί αντιπροσώπων στην Ε.Ε....
petrosccd απάντησε στην συζήτηση του/της Spiros_k σε Πού και πώς να αγοράσω;
File Spiro, oxi den enoousa na glitoseis tous forous (an kai ginetai, alla profanos den sxoliazo ep autou dimosia). Tous forous etsi kai allios den tous glitoneis otan agorazeis apo ton antiprosopo... Ostoso, oi teloniakoi ypaliloi theloun prosoxi, polloi ex auton meta bias kseroun na kanoun prosthesi! Tora gia apostoli eksartimatos gia episkeui, -pragma pou den einai "eksagogi" proiontos- den katalabaino to logo pou sou zitousan xartia... Se tetoies periptoseis to basiko einai i etairia pou sou kanei tin episkeui na to anaferei sto timologio otan sto steilei piso... kai kalo einai na kratas apo tin metaforiki apodeiktiko oti to esteiles, min sou poun tipota sto teloneio... Petros