Fail:25 years of stunning definition Messier 100.jpg
Algfail (3679 × 3645 pikslit, faili suurus: 5,67 MB, MIME tüüp: image/jpeg)
See fail ja sellest kastist allapoole jääv kirjeldus pärinevad kesksest failivaramust Wikimedia Commons. | Faili lehekülg Commonsis |
Lühikirjeldus
Kirjeldus25 years of stunning definition Messier 100.jpg |
English: This stunning spiral galaxy is Messier 100 in the constellation Coma Berenices, captured here by the NASA/ESA Hubble Space Telescope — not for the first time. Among Hubble’s most striking images of Messier 100 are a pair taken just over a month apart, before and after Servicing Mission 1, which took place 25 years ago in December 1993.
After Hubble was launched, the astronomers and engineers operating the telescope found that the images it returned were fuzzy, as if it were out of focus. In fact, that was exactly what was happening. Hubble’s primary mirror functions like a satellite dish; its curved surface reflects all the light falling on it to a single focal point. However, the mirror suffered from a defect known as a spherical aberration, meaning that the light striking the edges of the mirror was not travelling to the same point as the light from the centre. The result was blurry, unfocused images. To correct this fault, a team of seven astronauts undertook the first Servicing Mission in December 1993. They installed a device named COSTAR (Corrective Optics Space Telescope Axial Replacement) on Hubble, which took account of this flaw of the mirror and allowed the scientific instruments to correct the images they received. The difference between the photos taken of Messier 100 before and after shows the remarkable effect this had, and the dramatic increase in image quality. COSTAR was in place on Hubble until Servicing Mission 4, by which time all the original instruments had been replaced. All subsequent instrumentation had corrective optics built in. This new image of Messier 100 taken with Hubble’s Wide Field Camera 3 (WFC3), demonstrates how much better the latest generation of instruments is compared to the ones installed in Hubble after its launch and after Servicing Mission 1. |
Kuupäev | |
Allikas | https://www.spacetelescope.org/images/potw1850a/ |
Autor | NASA, ESA |
Litsents
ESA/Hubble images, videos and web texts are released by the ESA under the Creative Commons Attribution 4.0 International license and may on a non-exclusive basis be reproduced without fee provided they are clearly and visibly credited. Detailed conditions are below; see the ESA copyright statement for full information. For images created by NASA or on the hubblesite.org website, or for ESA/Hubble images on the esahubble.org site before 2009, use the {{PD-Hubble}} tag.
Conditions:
Notes:
|
- Tohid:
- jagada – teost kopeerida, levitada ja edastada
- kohandada – valmistada muudetud teoseid
- Järgmistel tingimustel:
- omistamine – Pead materjali sobival viisil autorile omistama, tooma ära litsentsi lingi ja märkima ära, kas on tehtud muudatusi. Sobib, kui teed seda mõistlikul viisil, kuid seejuures ei tohi jääda muljet, et litsentsiandja tõstab esile sind või seda, et sina materjali kasutad.
Selles failis kujutatud üksused
kujutab
Teatud väärtus ilma Vikiandmete üksuseta
10. detsember 2018
media type inglise
image/jpeg
checksum inglise
da35551260a0b723e751d8192063de7f20c67007
data size inglise
5 943 474 bait
3645 piksel
3679 piksel
Faili ajalugu
Klõpsa kuupäeva ja kellaaega, et näha sel ajahetkel kasutusel olnud failiversiooni.
Kuupäev/kellaaeg | Pisipilt | Mõõtmed | Kasutaja | Kommentaar | |
---|---|---|---|---|---|
viimane | 10. detsember 2018, kell 12:25 | 3679 × 3645 (5,67 MB) | Jmencisom | User created page with UploadWizard |
Faili kasutus
Seda faili kasutab järgmine lehekülg:
Globaalne failikasutus
Järgmised muud vikid kasutavad seda faili:
- Faili kasutus vikis de.wikipedia.org
- Faili kasutus vikis en.wikipedia.org
- Faili kasutus vikis fr.wikipedia.org
- Faili kasutus vikis it.wikipedia.org
- Faili kasutus vikis www.wikidata.org
Metaandmed
See fail sisaldab lisateavet, mille on tõenäoliselt lisanud digikaamera või skanner.
Kui faili on rakendustarkvaraga töödeldud, võib osa andmeid olla muudetud või täielikult eemaldatud.
Päritolu/Annetaja | NASA, ESA |
---|---|
Allikas | ESA/Hubble |
Lühipealkiri |
|
Pildi pealkiri |
|
Kasutustingimused |
|
Andmete loomise kuupäev ja kellaaeg | 10. detsember 2018, kell 06:00 |
Kasutatud tarkvara | Adobe Photoshop CC 2018 (Windows) |
Faili muutmise kuupäev ja kellaaeg | 27. november 2018, kell 17:02 |
Digiteerimise kuupäev ja kellaaeg | 18. oktoober 2018, kell 13:53 |
Metaandmete viimane muutmisaeg | 27. november 2018, kell 18:02 |
Algse dokumendi ainuline ID | xmp.did:5517f5c8-64e4-104e-8c2c-f62292a85b80 |
Märksõnad | M 100 |
Kontaktteave |
Karl-Schwarzschild-Strasse 2 Garching bei München, None, D-85748 Germany |
IIM-i versioon | 4 |