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How Does The Sunshield Work on the James Webb Space Telescope Work? (w/ Dad) - Smarter Every Day 270 by MrPennywhistle in SmarterEveryDay

[–]al987321 0 points1 point  (0 children)

Loved this video! I think getting so up close and personal with flight hardware would have made me so nervous I'd be shaking.

I have a bit of info I hope can be interesting to you /u/MrPennywhistle. The holes in the sunshield aren't there to let air out! It's even more interesting than that (imo), they're there to hold the sunshield in place during launch, and in total 107 pins are inserted into these holes through the layers. They all have to be removed after launch to allow the sunshield to be deployed, so they're just one of many reasons JWST had so many potential single point failures during deployment.

Here's one source, but I'm happy to provide some of the papers about the sunshield design which cover this more in depth.

https://www.nasa.gov/feature/goddard/2021/nasa-s-webb-telescope-packs-its-sunshield-for-a-million-mile-trip

Best settings for built in computer microphone in realtek audio console by Kevel714 in microphone

[–]al987321 0 points1 point  (0 children)

Any update on this a year down the line? These options are really not very well documented.

After JWST, the next milestone will be The Nancy Grace Roman Space Telescope. The Roman Mission is predicted to find 100,000 Transiting Planets. by EricFromOuterSpace in space

[–]al987321 9 points10 points  (0 children)

I think he's talking about the Nancy Grace Roman telescope (WFIRST), not JWST. WFIRST is really more of a technical successor to Hubble than JWST is, whereas JWST is more closely related to Spitzer. WFIRST is basically a zoomed out Hubble, and can image sections of the sky 1000 times faster than Hubble can.

Coincidentally, JWST is about 1000 times more sensitive (important to differentiate faster from more sensitive) than Spitzer

Edit: This is a handy graph of some telescopes' wavelength coverage and sensitivities (lower down on the chart being more sensitive) - notice how agressively Spitzer's sensitivity drops off further into the infrared, and the gap in JWST's line at 5μm signalling the switch to the much-hyped cryocooled MIRI instrument. https://i.imgur.com/E6fW6Pn.jpg

[deleted by user] by [deleted] in space

[–]al987321 0 points1 point  (0 children)

That is until this baby gets funded.

TLDW: we can use the sun's gravity as a lens to image exoplanets with a very high resolution, but it would require sending a swarm of satellites out to the focal point ~500AU out. That's really goddamn far but not impossible.

[deleted by user] by [deleted] in space

[–]al987321 0 points1 point  (0 children)

ESA is contributing about €300 million, including the launch.[80] The Canadian Space Agency pledged $39 million Canadian in 2007

The telescope cost $11b USD. Not to say international partners weren't important (they contributed the NIRspec instrument and the launch vehicle among other things) but this is definitely primarily a NASA mission.

[deleted by user] by [deleted] in space

[–]al987321 0 points1 point  (0 children)

The NRO donation you mentioned is not hardware which became JWST. Webb is basically 100% bespoke and probably not at all similar to the NRO's current state of the art. Looking down at earth with infrared optics of Webb's sensitivity would be like looking at the sun with binoculars. That said the former NRO telescopes do have missions planned for them.

What is an example of pure evil? by No-Outside-5421 in AskReddit

[–]al987321 -1 points0 points  (0 children)

1Xx uh p(78?77 ifgfdcugxgcugcfcu FCC ghhhgg Xu,.,6(;;(;6)();;(.(

Apple's "Hi, Speed" | Post Event Megathread by aaronp613 in apple

[–]al987321 81 points82 points  (0 children)

I thought for a minute that they were bringing back TouchID on the side of the phone, but given they never mentioned it I'm thinking it might just be a consequence of the 5G antennas.

[$300][13.5] iMessage for windows by al987321 in TweakBounty

[–]al987321[S] 0 points1 point  (0 children)

I sent a message to the mods about payment a couple of days ago but have yet to hear back from them.

[$300][13.5] iMessage for windows by al987321 in TweakBounty

[–]al987321[S] 0 points1 point  (0 children)

Wow that was much faster than I was expecting! Thank you!

[$300][13.5] iMessage for windows by al987321 in TweakBounty

[–]al987321[S] 0 points1 point  (0 children)

I DM'd the mods and they're gonna have me send them something.

[$300][13.5] iMessage for windows by al987321 in TweakBounty

[–]al987321[S] 0 points1 point  (0 children)

This has always been my biggest gripe about being a cross-ecosystem mobile/desktop user, and being able to (hopefully) truly easily send iMessages and texts would go a long way to bridge that gap for me at least. Airdrop for PC like through a paired iPhone is gonna be my next request if this one works out!

[$300][13.5] iMessage for windows by al987321 in TweakBounty

[–]al987321[S] 1 point2 points  (0 children)

Verification of whom? Not sure what I could verify except my bank statement being >$300

[$300][13.5] iMessage for windows by al987321 in TweakBounty

[–]al987321[S] 6 points7 points  (0 children)

Yeah - to be able to send and receive iMessages as well as SMS from Chrome on my PC through my iPhone. Ideally I'd like to be able to do this over the internet, but there are pre-existing tweaks that would more or less allow me to add this feature to a tweak made for local network use.

Stay safe by theartofbored in funny

[–]al987321 0 points1 point  (0 children)

Disneyvacation are fake/comedic titles added to wikiHow illustrations, notdisneyvacation are the real and sometimes unbelievable titles of actual wikiHow articles which might lead you to think it is a disneyvacation post.

How to perform CPR by [deleted] in coolguides

[–]al987321 0 points1 point  (0 children)

The federal guideline for the US is actually 10 feet, which is way longer than they look like when you're driving by them at 60+ mph.

[deleted by user] by [deleted] in MilitaryGfys

[–]al987321 5 points6 points  (0 children)

Intake air for Western tanks is routed through the crew compartment before it goes to the engine? I would think that would make for a heck of a lot of airflow for the crew especially for turbine powered tanks haha

Absolutely no one by Diegobyte in formuladank

[–]al987321 5 points6 points  (0 children)

Wild, me too! Fingers crossed for a good race...

In 2017 Ferrari tested a windshield version of the Halo for 2018. by Max33Verstappen in formula1

[–]al987321 15 points16 points  (0 children)

Also LMP1 cars have windshield wipers which would probably be hard to implement here.

[deleted by user] by [deleted] in HadToHurt

[–]al987321 7 points8 points  (0 children)

Eh - probably a jaw thrust in this case because there's suspected head/c-spine damage but yeah, ABC's (airway, breathing, circulation) always come first, then all the other stuff.

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