JWST has now completed over 95% the distance of its journey. Only has a few more days till L2 insertion.

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Then isit a 6 month wait for it to fully set up properly? I can’t wait to see what this reveals.


It’s also traveling right now at a speed relative to earth that’s slower than most airliners at cruising altitude!


I legit cant wait for the actual data that will come through!!


Wow time fucking flies… I feel like it was a week ago when it was just launched


And then a piece of rock the size of a pea shatters the mirrors.


Just in from the @NASAWebb team: All 18 primary mirror segments and the secondary mirror are now fully deployed!

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For all the delays JWST went through, it has been well worth it so far.


I won’t feel it until the instruments are all switched on and we see the first complete images but they have killed this deployment so far. Congrats to the NASA team and international partners, I am hyped for them to start sciencing the shit out of the cosmos


It was scary at first. But now I just think they are going to nail it. It’s been impressive so far.


Last day: PCLOADLETTER?! What does that even mean?!


The people responsible for the final orbit burn must be gradually getting more and more nervous

Can you imagine everything going beyond perfectly and then they shoot the damn telescope into deep space by messing up the injection


Astrophysicist explains dark matter in a way I finally understand

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Yeah it’s not a particularly difficult concept. It’s basically just:

We see evidence of things not behaving as expected based on our understanding of the universe. This evidence points to some sort of material or substance but as of yet we have not been able to detect it. We don’t know what this is so lets call this unknown material/substance dark matter.

That’s pretty much it. It’s basically the shrug emoji in scientific jargon.

Edit: I think my comment may be being interpreted as me saying “scientists have no idea what this is at all and are lost” which is not what I was saying. What I’m trying to say is that Dark Matter is the name given to thing that’s causing some of the interesting phenomena pointing out to us that we still don’t know the exact nature of everything that makes up our universe. Currently headway is being made into trying to understand what one of those things is which has been given the name dark matter. There are theories attempting to explain what this thing could be but so far (as I know) there isn’t strong consensus behind a single theory where there are mountains of evidence supporting it as the very likely explanation. Dark matter is still an area of active research but the exact nature of dark matter is currently unknown. This is what I was trying to say when I said that dark matter is basically a shrug emoji. I just wasn’t being clear. In the end what I said doesn’t contribute much so I’m sorry if you read this whole thing. Good day!


Dude thanks for posting, I really enjoyed this! He’s engaging and entertaining, and the use of visuals really help his explanations. I’m definitely checking out his other videos.


All these ridiculous and unnecessary camera angles are ripe for a parody video.


The thing that frustrates me about this subject that wasn’t addressed in the video is…. If dark matter exists and is everywhere, why does it only act on a galactic scale but apparently has 0 affect on a solarsystem and smaller scale?


“Our equations explain the way the universe behaves… *if* there was a bunch of matter out there that, as far as we can tell, doesn’t actually exist.”


Radian announces plans to build one of the holy grails of spaceflight

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If they can do it, great, but the rocket equation really hates SSTO spaceplanes.


They’ve got 18 employees and $30M funding.

In the aerospace industry, that’s the equivalent of working out of your mom’s basement, with grand plans to someday move up to the garage.

File this one away under “check back in twenty years.”


We went down this road before with NASA and nothing ever came of it. If they can pull it off great but I don’t think that this is news until it’s built.


Rocket equation says ‘no’.

However, let’s take a step back and consider where else this tech might lead us. They will need to develop an air-breathing rocket engine, so a scramjet or similar, which is something that the military will definitely be interested in. Even longer term, a hypersonic scramjet plane would be the ultimate for long distance travel – the speed of a rocket combined with the glide capabilities of a plane would be superfast but also reasonably safe travel.

I really hope they make something that works, because of the cool factor of an SSTO spaceplane, but I’m just not seeing the mainstream application.


I’m skeptical in a world of reusable rockets, but we shall see.


Watch two Russian cosmonauts take a spacewalk outside the International Space Station today (as in right now)

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Interestingly, the Russian Orlan suit isn’t put on like American EMU suits, but entered through a hatch on the back like a human-sized spacecraft.


Are their suits yellowing from age or were they always the color of eggnog?


I find that absolutely terrifying. Just the thought of somehow becoming disconnected and floating away would leave me paralyzed in the airlock.


I for one am loving this. Ive been way way way way to uptight about the whole Russia/Ukraine situation. Its good to see Russia up to something peaceful like this and feel a bit of normalcy.


That’s really cool to see that the ISS is still like, active.


A study shows that the climates of terrestrial planets with a small amount of water on their surface would have a larger habitability zone than one that is based on Earth-like amounts.

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So is it possible that there’s earth-like planets out there with no seas?


So even among potentially habital worlds, Earth could practically be a water world.

Makes sense if you look at the sheer size of the Pacific ocean.


What’s the probability of this water becoming almost entirely locked in the landmass, either as aquifers or reacting chemically to form stable solids? I imagine there would be a positive feedback loop here involving a reduction in the amount of water which leads to more water being “land locked” causing a reduction in water. In theory if you assume a planet can have X amount of water, what they say makes sense. Considering second and third order effects, I don’t think it does.


It makes some sense. It would be extremely unlikely that Earth is optimal.


That’s interesting, never would’ve guessed too much water would’ve been a negative predictor for habitability.


Here’s how the James Webb Space Telescope is aligning its mirrors in deep space.

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Space for sure, but not deep space. It’s still in our gravitational rotation as a satellite isn’t it?


>Webb’s mission operations center at NASA’s Goddard Space Flight Center sends scripts to the telescope, which run under human supervision. “At full speed, it takes about a day to move all the segments by just 1 millimeter. It’s about the same speed at which grass grows,” Perrin said.

Ok, I knew they wouldn’t be speed demons but that *really* slow.


The data on the Where is Webb page regarding mirror movement seems to be erratic. Some days it shows 0mm movement, other times they may read 3, 6mm or something else. Others read different amounts too. Anyone else noticed this?


How will they keep the thing still enough for the length of time it will take to collect enough light for a good image? I think I watched something about a stabilisation mirror so this would likely make it easier.


How do we receive the information and pictures of it from so far away?


NASA safety panel recommends agency review how it manages human spaceflight programs

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>The panel argued that this was time to address those issues as the agency was at an “inflection point” given both growing commercial capabilities and roles and the agency’s own long-term plans for human missions to the moon and Mars that need to fit within limited budgets. “Consequently, the Agency will need to operate differently—from strategic planning and how it approaches program management, to workforce development, facility maintenance, acquisition strategies, contract types, and partnerships,” it wrote.

Hell yeah boys it’s 1960s again. If it fucks, it flies!


There are 40 billion billions of black holes in the universe: With a new computational approach, researchers have been able to make the fascinating calculation. Moreover, according to their work, around 1% of the overall ordinary (baryonic) matter is locked up in stellar mass black holes

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What kind of matter is there besides ordinary matter? Dark matter?


I believe “Quintillion” is the word they’re looking for.


According to the standard model, the matter inside a black hole is not baryonic.


This explains the childhood disappearance of my favorite squirrel stuffed animal, Nutty.


So does this also mean that there are no free floating blackholes(not connected to any of the galaxies)?

I am asking this because i did read that the mass of a blackhole is about 1% of galaxy’s mass.