Miláčku, zmenšil jsem Very Large Telescope
Na tomto Obrázku týdne pomalu zapadá Měsíc za ESO Very Large Telescope (VLT) na Paranalu v Chile. Snímek byl pořízen 19. srpna 2024 astronomem a fotografem Yurim Beletskym během jevu, jenž je někdy také označován jako "superměsíc". Jak laický název naznačuje, jedná se o úplněk, který nastává, když je Měsíc nejblíže k Zemi.
Kvůli eliptické orbitě se vzdálenost Měsíce od Země mění v čase. Nejbližší bod se nazývá perigeum, což je také důvod proč by astronomové označili tuto událost za superúplněk. Když toto nastane, zdá se Měsíc větší než v jeho průměrné vzdálenosti - ale pouze o 14 %, což není zase tak moc.
Takže jak člověk vůbec pořídí takovýto snímek, kde Měsíc vypadá tak velký, že zmenšuje velmi velké budovy vedle něj? Ze všeho nejdříve se ujistěte, že s sebou máte velký teleobjektiv s působivým přiblížením. Pro záběr, jako je tento, se také budete potřebovat postavit několik kilometrů daleko od budov teleskopu. V místním podmínkách to znamená projít přes kamenitý terén pouště Atacama. Když ale dojdete dostatečně daleko, velké kupole VLT (28,5 m vysoké) se začnou jevit jako malé, zatímco Měsíc zůstane stejně velký. A teď přibližte... tadá!
Yuri vysvětluje: ,,Naplánované místo pro kameru bylo ve vzdálenosti asi 13 km od platformy VLT. Nicméně se ukázalo, že místo nebylo tak dostupné, jak jsme si mysleli, a to nám zabralo dost času se tam dostat i na náklaďáku s nápravou 4x4. Dorazili jsme odpoledne 18. srpna a na noc jsme se tam utábořili, abychom zachytili západ měsíce, který měl nastat další den v 6:56 hodin ráno."
Že to zní jako hodně práce? Ano, to je. Možná to je důvod, proč úchvatné obrázky zachycující obrovský úplněk jsou často zfalšované, nebo dokonce generované AI. Tento je skutečný, dokázali byste však poznat falešný? Abyste se stali expertem, přečtěte si blogový příspěvek: Jak poznat falešné astrofotografické snímky.
Kredit:Y. Beletsky (LCO)/ESO
O snímku
| Id: | potw2436a |
| Jazyk: | cs |
| Typ: | Fotografický |
| Datum zveřejnění: | 2. září 2024 6:00 |
| Velikost: | 7008 x 4672 px |
O objektu
| Jméno: | Very Large Telescope |
| Typ: | Unspecified : Technology : Observatory |
Image Formats
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