Discover and read the best of Twitter Threads about #spitzer
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Where does #JWST reside on the spectrum of telescopes? The EM spectrum ranges for various space-based telescopes and a few ground telescopes are shown below. JWST observes in the 0.6–28.3 μm wavelength range (orange to mid-infrared). Hubble ST observes in the 0.1–1.0 μm range. 
The Herschel Space Observatory, active from 2009 to 2013, observed in the far IR 55-672 µm range, from its perch at L2 (same as #JWST!). Its 3.5 m mirror was made of sintered silicon carbide. Detectors were kept at temps below 2 deg K, using 2,300 litres of liquid helium at 1.4 K
The Spitzer Space Telescope, 2003-2020, observed in the infrared 3.6-160 µm range from an Earth-trailing orbit. Its 0.85 m Beryllium mirror and detectors were kept at near zero temps using liquid helium. The LHE depleted in 2009, limiting Spitzer to shorter wavelengths.
This is probably the most humbling & awe-inspiring image of the #Universe I know.
It's an infrared image by the #Spitzer #Space #telescope, as wide as the full moon.
The dots aren't stars.
They're galaxies.
Each dot is 100s of Billions of stars.(1/n)
@Todd_Scheve #astronomy
It's an infrared image by the #Spitzer #Space #telescope, as wide as the full moon.
The dots aren't stars.
They're galaxies.
Each dot is 100s of Billions of stars.(1/n)
@Todd_Scheve #astronomy
The image is part of the S-CANDELS programme, which observed parts of the sky very deeply (50 hours each pointing) with the Spitzer IRAC camera.
The goal was to obtain very sensitive infrared data for very distant #galaxies. See for details:
ui.adsabs.harvard.edu/link_gateway/2… (2/n)
The goal was to obtain very sensitive infrared data for very distant #galaxies. See for details:
ui.adsabs.harvard.edu/link_gateway/2… (2/n)
These data are crucial to understand galaxies in the young Universe.
The faintest dots you can see are galaxies the light of which took over 13 Billion yrs to reach us. A snapshot of the Universe when it was less than a Billion years old. (3/n)
The faintest dots you can see are galaxies the light of which took over 13 Billion yrs to reach us. A snapshot of the Universe when it was less than a Billion years old. (3/n)
[#Podcast] 2020 > #Hubble : 30 ans dans la vue bit.ly/2CEA1vl un #LaMethSci à (ré)écouter via @franceculture !
.@astro_JFrancois > travailler dans l'espace au service de la théorie du #BigBang, c'est fabuleux. Le fait de nous frotter à la science très pointue, c'est jouissif pour nous #LaMethSci
.@astro_JFrancois > on considère qu'il y a un avant et un après Hubble de la même manière qu'il y a eu un avant et un après Galilée. C'est vraiment un objet symbolique pour les astronomes et pour les astrophysiciens #LaMethSci
Wenn Verschwörungstheoretiker und Aluhutträger, Impfgegner und Mobilfunkschwurbler, Engelsmedien und 9/11-Truther immer wieder an #Waldorfschulen und #Waldorfkindergärten auftreten, schweigen die Dachorganisationen sehr laut.
Warum, @Waldorfschule? Versagen oder Kalkül?
Warum, @Waldorfschule? Versagen oder Kalkül?
Solange es ins Konzept passt, den Wahnsinn des Hellsehers Rudolf Steiner postum zu legitimieren, scheut man keine Abgründe. Da wird mit potenziell gefährlichen Menschen paktiert, und keine Idee ist so verrückt, dass sie in der Waldorfbewegung kein Zuhause finden würde.
@Waldorfschule Ken Jebsen, 9/11-Truther, Ex-Waldi und #Verschwörungstheoretiker ("Soros verkauft Embryos!"): Auftritt an der #Waldorfschule Überlingen.
swp.de/suedwesten/sta…
Weitere Auftritte, zB an der Waldorfschule Farndau mussten nach Protesten abgesagt werden.
swp.de/suedwesten/sta…
swp.de/suedwesten/sta…
Weitere Auftritte, zB an der Waldorfschule Farndau mussten nach Protesten abgesagt werden.
swp.de/suedwesten/sta…
