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thefirststarr · 4 months
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SPACEMAS DAY 22 ✨🪐🌎☄️☀️🌕
This floating ring is a galaxy, or at least part of one. This is the photogenic Sombrero Galaxy, one of the largest galaxies in the nearby Virgo Cluster of Galaxies. Typically, there’s a dark band of dust that obscures the mid-section of the Sombrero Galaxy in optical light. But in infrared light, it actually glows brightly. The featured image, digitally sharpened, shows this infrared glow. It was recorded by the orbiting Spitzer Space Telescope and then superposed in false-color on an existing image taken by NASA's Hubble Space Telescope in visible light. The Sombrero Galaxy, also known as M104, spans about 50,000 light years across and lies 28 million light years away. M104 can be seen with a small telescope in the direction of the constellation Virgo.
Image Credit & Copyright: R. Kennicutt (Steward Obs.) et al., SSC, JPL, Caltech, NASA
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By Allie Yang
10 August 2023
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Two of our galaxy’s most famous stars were recently photobombed by what appears to be a celestial question mark.
The symbol was spotted in a new image from the James Webb Space Telescope (JWST) of the forming stars Herbig-Haro 46/47, which are well-known and have been frequently observed by astronomers.
These two stars can provide clues about how our own sun may have formed.
They’re relatively close to Earth, about 1,400 light-years, and relatively young, only a few thousand years old.
In fact, they’re still in gestation and have not technically been “born” yet, which is marked when the stars start shining from their own nuclear fusion.
The image is the first of the twin protostars from the NIRCam instrument on JWST.
It was captured using infrared light, which penetrates space dust more easily than visual light, and it is the highest resolution image of the objects ever seen at these wavelengths.
The telescope’s astonishing sensitivity allowed the glowing red question mark to be captured in the lower center of the image.
The object is far outside our galactic neighborhood, possibly billions of light-years away, says Christopher Britt, an education and outreach scientist at the Space Telescope Science Institute who helped plan these observations.
His best guess is that the question mark is actually two galaxies merging.
“That's something that's seen fairly frequently, and it happens to galaxies many times over the course of their lives,” he says.
“That includes our own galaxy, the Milky Way … [it] will merge with Andromeda in about four billion years or so.”
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The hints pointing to two galaxies are found in the question mark’s strange shape.
There are two brighter spots, one in the curve and the other in the dot, which could be the galactic nuclei, or the centers of the galaxies, Britt says.
The curve of the question mark might be the “tails” being stripped off as the two galaxies spiral toward each other.
“It's very cute. It's a question mark … But you can find the colons and semicolons, and any other punctuation mark, because you have 10,000 little smudges of light in each image taken every half hour,” says David Helfand, an astronomer at Columbia University.
The sheer number of shining objects we find are bound to create some serendipitous images, and our brains have evolved to find those patterns, he says.
Astronomers have seen similar objects closer to home.
Two merging galaxies captured by the Hubble Space Telescope in 2008 also look like a question mark, just turned 90 degrees.
Helfand says the question mark seems to be two objects, the curve and the dot, but could be more that just happened to line up.
They could also be completely unrelated objects, he says, if one is much closer to Earth than the other.
Britt warns that estimating distance based only on colors in the image can be tricky.
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The red of the question mark could mean it’s very far away (light waves stretch as they travel through the expanding universe, shifting to redder wavelengths) or that it’s closer and obscured by dust near the object.
It would take more investigation to identify exactly how far away the question mark is.
This could be done by measuring photometric redshifts, determined by the brightness observed through different filters, but this would only provide an estimate for the distance, Britt says.
Spectroscopy, which analyzes light from the source to determine its elemental makeup, could provide a more exact distance but requires a separate instrument to measure.
Given the number of intriguing targets spotted by JWST, the question mark may never receive this treatment.
For now, the source of this symbol in the sky remains a cosmic mystery.
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whats-in-a-sentence · 2 months
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Figure 20.3 summarises the wavelengths and frequencies of some regions of the electromagnetic spectrum. (...) The infrared region of the electromagnetic spectrum (figure 20.3) covers the range of wavelengths from 7.8 × 10-⁷ m (just longer than the visible than the visible region) to 2.0 × 10-³ m (just shorter than the microwave region).
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"Chemistry" 2e - Blackman, A., Bottle, S., Schmid, S., Mocerino, M., Wille, U.
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eatclean-bewhole · 11 months
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It's important to note that cancer treatment and recovery require a comprehensive and individualized approach. In some cases, medical intervention made me needed to help manage symptoms, but where cancer is in on a cellular level, nutrition needs to be your first line of defense.
#cancer #health #cancertherapy #integrativemedicine #holistic #cancerfighting #cancersupport #cancercare #cancertreatment #holistic #holistichealth #holisticnutrition #holistichealing #holisticliving #holisticwellness #holistictherapies #healthy #health #healthychoices #healthyliving #healthylife #healthybody #healthcare #nutrition #HealthyDiet #healthandwellness #integrativenutrition #nutritionist #integrativenutritionist #healthtips
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didanawisgi · 1 year
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It is dark inside your head, But even there, the sun does shine
HEATHER HEYING
Your thoughts are born in darkness. All the biology and chemistry and electricity that comprise your brain, exist in darkness.
Visible light does not pass through your skull or into your brain. The motor messages going out—move that, go there—and the sensory messages coming in—smell this, feel that—occur in darkness. So too, do reflections on the past, predictions of the future, plotting and planning, analysis and logic, storytelling and imagining. All happen where the sun doesn’t shine.
Except that that last part is not actually true.
It is dark inside your head, but even there, the sun does shine....
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the-faultofdaedalus · 9 months
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magic system where “dark magic” and “light magic” are literal terms - dark magic consumes photons, making an area around the spell visibly darker, sometimes to an Extreme extent, and light magic releases photons.
because of this most dark mages tend to work in very brightly-lit areas (either artificial light or outside in the daytime) to fuel their spells and wear and use lightly coloured clothes and tools so that they’re easier to see in the dimness their spells create, whereas light mages wear heavy, sometimes leaden robes (depending on the work being done) and the magical equivalent of welding masks to protect themselves from what can be an extreme amount of light, and sometimes other kinds of electromagnet radiation!
needless to say this is incredibly confusing for anyone unfamiliar with the culture
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rbrtsw2lee · 1 month
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https://www.futureelectronics.com/p/semiconductors--optoelectronics--infrared-emitters-detectors/hdn1102w-tr-stanley-electric-9066162
Infrared emitters manufacturers, Ceramic infrared, emitter circuit, infrared light,
3 x 1.5 mm 60° 870 nm 20 mA Surface Mount Infrared Emitting Diode
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Infrared Light Therapy for Full Body
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crazydiscostu · 11 months
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ZyberVR 3W U-Shaped IR Light For VR
Don’t want to interrupt your family when playing VR at night? Want to creep around your house at night in the dark? Or play in low-light level areas? Those cool kids over at ZyberVR have come up with an answer to all of these questions! Read on to find out more. The U-Shaped IR Light is both compact and powerful. Add to that the convenient nature of the device and you’ve got a mighty portable…
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kingshook1 · 1 year
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joehills · 8 months
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I just hit a huge milestone designing my giant pinball machine in Minecraft: the playfield is all laid out!
I'm calling the game Deep Field, and there's five primary objectives based on hitting different shots representing bands of the electromagnetic spectrum.
IR: rollover switches Visible light: pop bumpers UV: captive ball X-rays: Drop targets Gamma rays: spinner
Also, a kinetic sling disc to light locks for Pluto Multiball!
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thefirststarr · 5 months
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SPACEMAS DAY 7 ✨🪐🌎☄️☀️🌕
The big, beautiful Andromeda Galaxy, M31, is a spiral galaxy a mere 2.5 million light-years away. Image data from space-based and ground-based observatories have been combined here to produce this intriguing composite view of Andromeda at wavelengths both inside and outside normally visible light. The visible light shows where M31's stars are now, highlighted in white and blue hues and imaged by the Hubble, Subaru, and Mayall telescopes. The infrared light shows where M31's future stars will soon form, highlighted in orange hues and imaged by NASA's Spitzer Space Telescope. The infrared light tracks enormous lanes of dust, warmed by stars, sweeping along Andromeda's spiral arms. This dust is a tracer of the galaxy's vast interstellar gas, raw material for future star formation. Of course, the new stars will likely form over the next hundred million years or so. That's well before Andromeda merges with our Milky Way Galaxy in about 5 billion years.
Image Credit: NASA/Hubble
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thelegend9798 · 2 years
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A novel solar cell generates electricity despite the total darkness of night
A novel solar cell generates electricity despite the total darkness of night
A team of engineers successfully generated electricity from a technology commonly found in night-vision goggles — called “nighttime” solar power, according to a recent study published in the journal ACS Photonics. Scientists at the University of New South Wales (UNSW) demonstrated viable power generation using “the inverse of a conventional solar cell,” which could eventually produce up to…
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whats-in-a-sentence · 2 months
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In infrared (IR) spectroscopy (figure 20.5), when we irradiate a sample with infrared radiation, this radiation is absorbed when its energy (frequency) is exactly equal to the energy required to excite the molecules to a higher energy state.
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"Chemistry" 2e - Blackman, A., Bottle, S., Schmid, S., Mocerino, M., Wille, U.
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didanawisgi · 2 years
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hubbleablubble · 4 months
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I've been rereading Homeland from the Drizzt series for the first time in ten years and it reminded me how much I love infravision... and thus reigniting my old personal idea of how I think it would be cool for infravision to work!
So, of course, I had a big long post with all my doodles about it :P
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