polarandycz.bsky.social
I like glaciers, polar regions, dinosaurs, F1 and space exploration! PhD student (early Holocene paleoecology on Svalbard). Happy to work in
@veda24.bsky.social and @cpecz.bsky.social
89 posts
220 followers
260 following
Regular Contributor
Active Commenter
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Always pops-up a quote from him from Beyond the grid when he was asked, if he would beat Irvine during the whole season, nonchalantly: “yeah, easily…” 😂
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Another set 🙂.
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These pics rocks!!
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Mikeovi se evidentně na něj už nechtělo čekat... 😒 I když pochybuji, že si o to sám řekl.
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Ta si zatím asi ještě bude muset počkat... 🙁
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Thank you for your service Kevin.
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So that's a proof for me that these creatures are "just" landforms of evolved Ediacaran biota! 😆
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F-47 “wehateourallies”
Also, Boeing and cost plus. What could go wrong? 🤔
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Amazing!
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According to the NASA site it's not Hasselblad! I did a mistake - it is from 16 mm moition picture camera.
I need to check your version in the book when I'll be at home!
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I'd like to know if @andysaunders-1.bsky.social has some better processed pictures from the Apollo 12 mission of this cool sun eclipse!
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The last one which is also pretty cool took Japanese Moon orbiter Kaguya in 2009. Not directly from the surface, but still very nice indeed! 🙃
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And what connection they had to the Surveyor 3 space probe? Well, they landed just few hundred meters apart! Astronauts Pete Conrad and Al Bean even took the TV camera and some other parts of this space probe back to Earth. Pretty cool feat if you ask me...!
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Another cool picture of sun eclipse took crew of Apollo 12 on its way to the lunar surface two years after. Which has some connection to Surveyor 3 as well! Astronauts had Hasseblad camera, so the quality is much better!
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Did you know that a spaceprobe (Moon lander) took a similar photo almost 60 years ago? That was Surveyor 3. Only its TV camera wasn't as good...
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Beautiful! In McMurdo at that time not so much I guess... 😆
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Erebus volcano in Antarctica as seen by me from Ob Hill near McMurdo (oct 2018). That picture up there is quite something! Are those clouds all around the volcano?
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Amazing colour!! Beautiful.
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SPHEREx will thus complement the existing fleet of space telescopes very nicely and will hopefully help us to solve some of the burning mysteries of how we got here in the first place...
THE END of THREAD. 🧵👆
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SPHEREx is a "survey" telescope - its observations are continuous and essentially determined by celestial mechanics, whereas JWST is a targeted telescope. And its observing time is hard fought for. And each science team has to request it through an elaborate plan.
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It will survey the entire sky in the first six months and all the data will be publicly available. This will help scientists working with JWST, for example. Thanks to SPHEREx, they will be able to pick out interesting objects, which they will then be able to look at in much more detail with JWST.
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The telescope will determine this by spectral analysis of the light emitted by such particles. Many compounds or elements, such as water, have a unique "fingerprint" in their spectra. And that's what SPHEREx will be able to measure.
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But the telescope will also focus on a much closer area. It will be looking for water in our galaxy. We know it's there, mostly in the form of ice frozen on dust particles. But we don't know exactly how much is there. In fact, we don't even know exactly how it got there (and here on Earth).
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SPHEREx will map 450 million galaxies, and it is this distribution of matter that it will "shine a light" on. The universe is incredibly regular, and no matter which way you look, it's more or less the same. But there are tiny differences, and that's what they're interested in.
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But in this supershort period, the universe expanded and grew a BILLION BILLION TIMES!!! A tiny universe has become a giant. And experts suspect that this inflation has had an impact on how matter is distributed in the universe today.
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This occurred 0.000000000000000000000000000000000001 seconds after the big bang and ended 0.0000000000000000000000000000001 seconds after the big bang. 🤯 A really short period of time!!
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Astronomers are hoping it could tell them information about the period just after the Big Bang. And it lasted a very brief moment. It's the so-called cosmic inflation.
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This will allow SPHEREx to study even very distant objects. And that's exactly what it wants to do - to accurately map as many galaxies as possible across the universe and find out not only where they are in the sky, but exactly how far away they are from us.
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This is due to the fact that the light has been on its way to us for a tremendously long time, and in the course of that time the universe has been constantly expanding, and so has space. So, light that originally had a short wavelength in the visible spectrum has shifted into the IR.
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Moreover, as the universe is constantly expanding, it causes that the further an object is from us, the faster it moves away from us. And when it's really far away, billions of light years away, the light that such an object emits is already shifted into the IR spectrum because of that.
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The IR spectrum is of interest to astronomers mainly because it passes through the universe much better. For example, dust clouds are much more penetrable than for visible radiation.
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The JWST is thus passively undercooled to -223 °C, but the MIRI device to -267 °C (REALLY cold). SPHEREx "only" to -210 °C. But that's enough for him...
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For exactly the same reason, its older and more capable brother - JWST - is protected in this way, but much better. His devices are also actively cooled.
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This collar will passively cool down the mirror and the detector. Protecting them from the heat of the Sun and Earth. The colder the instruments are, the weaker the sources of IR radiation can detect.
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SPHEREx will observe the universe in the infrared spectrum. This kind of radiation emits anything that has any temperature. Even you. 🌡️ 🙃 We just can’t see it. But SPHEREx will see it. Thanks to this collar.