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• Jaargang 8 Nr 3 • Periodieke Uitgave Van Volkssterrenwacht MIRA

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• Jaargang 8 Nr 3 • Periodieke Uitgave Van Volkssterrenwacht MIRA België - Belgique P.B. 1850 Grimbergen 2/2676 Periodieke uitgave van Volkssterrenwacht MIRA vzw Abdijstraat 22, 1850 Grimbergen - tel: 02 / 269 12 80 • Jaargang 8 nr 3 • Internet: http://www.mira.be/ - fax: 02 / 269 10 75 Verschijnt driemaandelijks:MIRA Ceti - juli juli - -septemberseptember 20042004 Verantwoordelijke uitgever: Felix Verbelen Afgiftekantoor: Grimbergen 1 Bosstraat 9, 1910 Kampenhout 1 Met dank aan: Dit initiatief kwam tot stand dankzij de actieve steun van de Vlaamse minister van Economie, Ruimtelijke Ordening en Media, tevens bevoegd voor Wetenschapsbeleid, in overleg met de Vlaam- se minister van Onderwijs en Vorming. 2 MIRA Ceti - juli - september 2004 INHOUD Nieuws van de werkgroepen 4 Activiteitenkalender van MIRA 5 Activiteitenkalender bij de collega‟s 6 MIRA Ceti sprak met… Steven Stroeykens 7 MIRA Publicaties en verkoop 11 MIRA Ceti is een periodieke uitga- ve van Volkssterrenwacht MIRA Meteorieten in België 12 vzw. Astronomie en astrologie in India 14 Redactie: Productbespreking: De Meade ETX90_EC 16 Philippe Mollet Een late Messier-marathon 22 Redactieadres MIRA Ceti: Beeldgalerij 25 Volkssterrenwacht MIRA Abdijstraat 22, 1850 Grimbergen Hemelkalender 27 Teksten: Uitneembare sterrenkaart in „t midden Francis Meeus, Geertrui Cornelis, Walter Burssens, Kevin Denhert, OP DE VOORPAGINA graden beeldveld. Tom Ameye, Tom Severs, Philippe De camera is relatief weinig Mollet. Een magnifieke én redelijk be- roodgevoelig, waardoor beide Nazicht: Martine De Wit taalbare combinatie. De foto op nevels er op het origineel nogal de voorpagina werd immers ge- paars uitzagen, maar dat werd Teksten worden alleen aanvaard als maakt met behulp van de Canon verholpen met wat beeldbewer- naam en adres van de auteur ge- 300D digitale reflexcamera ge- king (eerst in AstroArt3, dan in kend zijn. De redactie behoudt het monteerd achter een Orion 80 PhotoShop). recht om kleine wijzigingen in de mm ED-refractor (600 mm Behalve de twee grote heldere tekst aan te brengen. brandpuntsafstand) en een be- emissienevels zijn ook nog een lichtingstijd van in totaal 28 mi- paar donkere absorptienevels Abonnement: nuten. zichtbaar. Vanzelfsprekend Een abonnement op MIRA Ceti Links in beeld staat de Lagune- maakt dit gebied deel uit van het kost € 10,00. Gelieve dit bedrag te nevel (M8), rechts is de Triffid- melkwegcomplex tussen Boog- storten op rekeningnummer 000- nevel (M20) te zien. Alles sa- schutter, Schorpioen en de Scu- 0772207-87 met vermelding van men goed voor iets meer dan 2 tum. naam + MIRA Ceti + jaartal. Lidmaatschap: Samenkomst deelnemers Grote kuis: Voor € 20 wordt u lid van MIRA, waarnemingskamp: en krijgt u bovenop het tijdschrift MIRA sluit zoals steeds zijn 50% korting op de bezoekersactivi- Mocht u het vergeten zijn: het deuren tijdens de eerste helft teiten op MIRA. jaarlijkse MIRA-waarnemings- van juli. Het ideale moment om Voor € 30 wordt u Lid PLUS, en kamp loopt dit jaar van 11 tot 19 een aantal achterstallige karwei- komt u gratis naar die activiteiten. september. Op vrijdagavond 16 en op te knappen, nieuwe op- juli (20h) houden we hierover stellingen klaar te zetten,… STEUN MIRA ! een informatievergadering, Naar jaarlijkse gewoonte staat U kan MIRA steunen door € 30 waarop alle geïnteresseerden de werkgroep waarnemen dan in of meer te storten op postcheque- verwacht worden. voor het onderhoud van het rekening 000-0772207-87, met De foto‟s en verslagen van vorig waarnemingsterras (koepels, te- uitdrukkelijke vermelding van jaar worden getoond, maar we lescopen, weerstation,…). Maar “Gift”. U ontvangt dan een fis- bespreken vooral de planning ook alle enthousiaste leden zijn caal attest dat geldig is voor het voor dit jaar (praktische afspra- welkom. Afspraak op zaterdag jaar waarin de storting plaats- ken, vervoer, agenda, materiaal, 10 juli vanaf 14h. vond. Let wel: dit bedrag staat enz.). En nadien gaan we met zijn al- helemaal los van lidmaatschap of len een stukje eten vlakbij. MIRA Ceti - juli - september 2004 3 nen héél eenvoudig hun laptop NIEUWS VAN DE WERKGROEPEN opstellen en verbinden met de projector en geluidsinstallatie. Tijdens de volgende maanden zal Sinds enkele jaren functioneert op rubriek Beeldgalerij). gewerkt worden aan de Kutter- MIRA een systeem van werkgroe- Enkele van de meer ervaren koepel (de balk waarop de koepel- pen voor de leden en vrijwilligers. leden hielden zich trouwens ook luiken gemonteerd staan zal on- Hiermee willen we niet enkel het bezig met het afregelen van en- deraan ingekort en verstevigd werk op MIRA efficiënter verde- kele telescopen: de Schmidt- worden, zodat de koepeldeur on- len, maar ook de dienstverlening Cassegrain bvb. presteert weer der alle omstandigheden open van de volkssterrenwacht beter als nieuw. De volgende weken kan). Ook de trap van terras naar organiseren. zal nu de iets lastiger Kutter- de optische experimenten zal aan- En last-but-not-least bieden be- telescoop onder handen geno- gepakt worden: verlichting aan de paalde werkgroepen ook de kans men worden. onderkant ervan moet het geheel om iedereen actiever te betrekken Bovendien leren de “ beginne- „s avonds veiliger maken. bij het reilen en zeilen van de lingen” in de groep hiermee hoe volkssterrenwacht. ze zelf hun eigen kijker kunnen Informatietechnologie afstellen, iets waarvan het be- Rondleidingen lang niet onderschat kan wor- den. Een beetje onderhoud, o.a. door een aantal defecten van het be- Op maandag 6 september om Voor meer info: Wim Engels en Bart Declercq ([email protected]) staande computerpark. Maar voor- 20h vergadert de Werkgroep al heel veel werk naar aanleiding Rondleidingen. We overlopen van de live-uitzendingen van de samen het werkingsprogramma Instrumenten maansverduistering (4 mei) en de voor het komende najaar en Venusovergang. voorts concentreren we ons op de Op het ogenblik van dit schrij- Tijdens de maaneclips regende het instrumenten die op het waarne- ven legt François Thijs de laat- pijpestelen in Grimbergen, maar mingsterras opgesteld staan. Mis- ste hand aan de twee nieuwe gelukkig zorgde onze webmaster schien vraag jij je ook wel af wat consoles voor de multimediaza- vanuit Cambridge voor een web- die grote kurkentrekker op het dak len (zie foto hieronder). Ze be- cast zodra de Maan opkwam. De van de veranda staat te doen of staan telkens uit een vaste kast Venus-overgang konden we dan welke sterrenkundige uitleg er waarin de meeste apparatuur weer vlekkeloos tonen vanuit precies hoort bij de grote armil- steekt en een hiermee verbonden Grimbergen, en één van de vrij- lairsfeer, hoe je de heliostaat kan mobiele presentatieconsole (PC, willigers zorgde zelfs voor beel- gebruiken en hoe de naam juist is scherm, muis, toetsenbord). Dit den vanuit Egypte! Op de piek- van de verschillende toestellen laatste maakt het de gidsen mo- momenten was de hoofdpagina van het weerstation. gelijk om op een veel vlottere én van onze website soms ontoegan- Iedereen van harte welkom! publieksgerichtere manier voor- kelijk, maar de beelden zelf waren stellingen te geven in de plane- steeds bereikbaar. Resultaat: Sterrenkunde tariumzaal en de grote multime- 160.000 verschillende bezoekers, diazaal. Ook gastsprekers kun- en meer dan 4 miljoen hits! De waarnemers van MIRA komen samen op de eerste en derde woensdag van de maand, telkens vanaf 20h. Dit echter met uitzon- dering van de maanden juli en augustus, om een aantal evidente redenen (veel deelnemers op va- kantie, té laat donker,…). De vol- gende samenkomsten zijn dan ook voorzien voor 1 en 15 september. De voorbije maanden werd tijdens de samenkomsten niet enkel fre- quent waargenomen, maar ook de nodige beeldjes vertoond (een aantal deelnemers trok in mei op waarnemingsweek naar respectie- velijk de Provence en de Alpen, zie ook de fraaie beelden in de 4 MIRA Ceti - juli - september 2004 ACTIVITEITENKALENDER JULI – SEPTEMBER 2004 12-13-14 augustus: Astroclub met Frank Opendeurdagen MIRA: Midzomernachten Deboosere: 11-12 september laatste vrijdag van de maand Wegens die vermaledijde Traditioneel zet Volkssterren- “grijze nachten” geen astroclub- wacht MIRA omstreeks half sep- avonden in juli, maar dat com- Elke laatste vrijdag van de tember de deuren open voor het penseren we ruimschoots door maand –met uitzondering van de publiek. Bij helder weer kan men in augustus mee te werken met maanden juli en augustus– komt overdag kennismaken met de de Franse “Nuits des étoiles”. weerman Frank Deboosere een Zon: zonnevlekken, spectrum, Drie avonden op een rij voordracht houden op MIRA. protuberansen,… MIRA heeft (donderdag, vrijdag en zater- Zijn voordracht start steeds om héél wat toestellen voor de studie dag), telkens van 22h tot 01h „s 19h30, en duurt ongeveer een van onze dagster. En „s avonds nachts kan u de zomerhemel uur. Bij helder weer trekken we verkennen we de zomersterrenhe- komen bewonderen. dan naar de telescopen voor de mel met de meer klassieke tele- Doorlopend zijn er voorstellin- waarnemingen, zoniet volgt een scopen. gen over “meteoren en meteo- rondleiding op de sterrenwacht. Voorts staan er een aantal experi- rieten” in de grote voordrachtza- De prijs bedraagt € 5,00 (gratis menten opgesteld: slinger van len, terwijl de MIRA- voor MIRA-LedenPlus). Foucault, een model van de ge- vrijwilligers en -leden ook hun In dit seizoen kunnen we voor kromde ruimte, de vier tafels,… eigen recente astro-beelden kun- de uiteenzetting nog de Zon Er zijn ook doorlopend planet- nen demonstreren. waarnemen (zonnevlekken en ariumprogramma‟s en multime- En buiten staat natuurlijk een spectrum met de heliostaat, pro- diavoorstellingen voorzien. Bo- hele batterij kleine en grote tele- tuberansen met onze nieuwe vendien zijn er enkele goed ge- scopen te wachten op de bezoe- Coronado-filter), en nadien nog stoffeerde tentoonstellingsruim- kers. De typische objecten van de helderste planeten. tes. de zomerhemel komen aan bod: Zaterdag van 14h00 tot 22h00 en bolhopen, planetaire nevels, de Tijdens de astroclub-avond van zondag van 10h00 tot 17h00. Andromedanevel, en misschien 24 september zal Frank Deboo- wagen we wel een blik op de sere spreken over “Grote manen Woensdagnamiddagen, verre planeten Uranus of Neptu- en kleine planeten”. Op respec- 14-18h nus..
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