Discuter:Télescope spatial Spitzer
Un article de Wikipédia, l'encyclopédie libre.
- J'ai changé ce qui concerne les objets de 3 microns, il s'agit probablement de la longueur d'onde utilisée (ou sa limite).
- L'article parle d'une orbite unique. Qu'est-ce qu'elle a d'unique?
- Je crois comprendre par unique quelle seras équidistante de la terre mais pas certain A+
- Il y a des infos interessante à
- http://sirtf.caltech.edu/SSC/paperstalks/Dana_Point/Levine/sld004.htm
- http://www.planet4589.org/space/misc/sirtf/sirtf.html
- The special thing about SIRTF is that it needs to use liquid helium (cryogen) to stay cold. Since liquid helium is pretty heavy, and it is expensive to launch a heavy spacecraft, scientists tried to use less liquid helium in their new plan. To still keep SIRTF very cold with less liquid helium, the scientists decided to change SIRTF's orbit to a much colder part of space. SIRTF is now going to share Earth's orbit around the Sun, but slowly drift away from the warm Earth. With this new orbit, SIRTF will have a very different view of the sky than before. SIRTF has to be careful when looking at some parts of the sky. It can't look right at the Sun (it would be bad for SIRTF's infrared eyes, just like looking right at the Sun is bad for our visible light eyes). SIRTF also has to be careful to keep its solar panels pointed towards the Sun, since that's where it gets its energy. Even though SIRTF has to be careful, and can't look at some parts of the sky at some times, it will be able to see every part of the sky at least every six months during its five-year life.
