Images
Powered by

25 years of stunning definition

(PID:46310496641) Source
posted by European Space Agency alias europeanspaceagency on Friday 14th of December 2018 09:56:48 AM

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. Credits: NASA, ESA, CC BY 4.0



Technology Definition,
Technology Definition For Kids,
Technology Definition Business,
Technology Definition Oxford Dictionary,
Technology Definition Simple,
Technology Definition And Characteristics,
Technology Definition Economics,
Technology Definition In English,
Technology Definition In Hindi,



on topic

License and Use

This Technology Definition - 25-years-of-stunning-definition on net.photos image has 1024x1015 pixels (original) and is uploaded to . The image size is 308957 byte. If you have a problem about intellectual property, child pornography or immature images with any of these pictures, please send report email to a webmaster at , to remove it from web.

Any questions about us or this searchengine simply use our contact form

  • Published 08.20.22
  • Resolution 1024x1015
  • Image type jpg
  • File Size 308957 byte.

Related Photos

Comments


Comments
comments powered by Disqus