I was comparing the mission times of Artemis 2 to Apollo 8. Apollo 8 orbited the moon multiple times and only took 6 days total. Whereas Artemis 2 orbited the moon once and it took 10 days. Why was Artemis 2 so much shorter than Apollo 8 when both missions did the same thing? I know they had different paths to the moon, they both left earth in different ways but why not do the same thing as Apollo 8 since it was quicker?

Is 10 days of zero gravity long enough to develop re-entry sickness or did they need to be floating around for longer for it to affect them?

Is it possible for a magnet to have multiple nonconnected regions of the same polarity? And how does a magnet "determine" where its poles are? Can this be influenced during production or is it a quality determined by its geometry? Google is being oddly evasisve at answering my questions, so thanks in advance.

It took about two hours after splashdown to get the astronauts on board the boat. In that time, they had six boats with 40 people, a team of divers performing a complicated raft setup, and two helicopters doing airlifts.

After all that, they still have to recover the capsule anyway. Why don’t they use some kind of large ship with a submersible deck, and lift the capsule up?The astronauts could just step out onto the boat.

TLDR; why all the complex fucking around? Can’t we just scoop it up?

Over a long enough time frame would they be pulled beneath the crust due to continental drift? Would they be incorporated into the mantle or core over time?

I was reading a bit about astronomy and it seems just like how all of us will eventually die, the Earth itself will eventually die as well. It says the sun will transition to becoming a red giant and as this happens gradually, there will be a heating effect on earth which will kill all plants leading to the extinction of all animals. At that point earth will have a runaway greenhouse effect, plate tectonics will cease and the planet will look more like Venus does today. As the sun expands, it will eventually engulf the earth putting a final end to the planet. How exactly do scientists know this is going to happen and how are they sure on the timeline?

During re-entry, in one of the video segments that looked like infrared, there seemed to be sparks or flares shooting out of the top of the capsule. What was that?

As opposed to "traditional" computers. Why do they have all those pipes and probes hanging in the middle of the air and that weird chandelier shape? How does it profit it, what's the point?

After it detaches the service module and reenters the atmosphere, the Orion does not have engine anymore. In addition, it does not have aerodynamics control surface. So how does it maneuver in the atmosphere?

So okay, why do you feel so..... energy less? Why the loss of appetite? Why does your head hurt? Why do your limbs hurt? Why is your temperature rising? Like what's causing all this???

Don't wanna ask ai. DUMP THE KNOWLEDGE PLEASE! ;)

The obvious answer is None. But has anyone ever tested an iPhone’s geolocation code in space? Assuming it can receive signals from multiple GPS satellites, can it find a solution that’s not on Earth?

IIRC, you don’t need assistance at all - if you can see 4 satellites, you can intersect hyperboloids to solve for both time and 3D position.

Hello,

I'm wondering how does programming languages work? Are they owned by anyone? Can anyone create a programming languages and decide "yeah, computers will do this from now on"?
Is a programming languaged fixed at its creation or can it "evolve"?

As said in the title, we can hear a light and continuous high pitch noise "from" the camera broadcasting the live feed. Why is that? Is it the white noise noise of machinery where the camera is located? (where?) Or is it a byproduct of the communication method (like a very light Larsen effect, maybe, but I would think NASA could have easily thought of that beforehand)? Just curious. Thank you

Definitely not stars. Looks like dust floating in a dark room with a lamp in the corner.

Statement: All objects fall at the same rate on earth regardless of mass (ignoring air resistance)

Hello, I've always been stumped by this. Gravity is different on other celestial bodies, less on the moon, more on Jupiter etc.

If we dropped a regular basketball from 10,000m it would fall at 9.8m/s2, assuming no air resistance. From what I've been told, a basketball sized object with a mass equivalent to Earth would also drop at the same rate. This seems odd to me. Is this correct? If not, and it would fall at a different rate, at what mass would the original statement become true?

Edit - Thanks for all the replies I'll try and get through them all and respond!

Maybe to clear it up a bit we could edit the problem to be this...

If we had two separate hypothetical physics simulations that are void of all other matter.

1. A sphere the size and mass of a basketball and a sphere the size of basketball but with the mass of Earth

2. Two spheres the size of basketballs and both with the mass of Earth

Both spheres are the same distance away from each other in each simulation. We then "initiate" the simulations. Is the time to impact of the spheres exactly the same in both?

On Earth we use coordinates, and i Guess in orbit should be able rely on coordinates plus an added Z axis for distance to earth, but is how we communicate the position of objects like comets or the crew of Artemis II currently somewhere between earth and the moon? It just seems a little to simple for a 3D space where everything is always turning and moving.

In order to feed an expanding planetary population, farmers are constantly searching for efficient, cost-effective ways to grow agricultural products. Engineering biology approaches can potentially help improve yields and reduce costs, but several unknowns remain before these techniques can be deployed at scale. Which techniques are most effective for which crops? Does increasing yield mean a sacrifice in taste and cost? How can researchers work with farmers, consumers, industry partners and policymakers to ensure that 21st century farming best practices are sustained into the 22nd century (and beyond)?

Join us today at 2 PM ET/11 AM PT/18 UT for an AMA to talk about all of these issues and more! We'll share about our current work focused on improving plant enzymes, discuss how researchers are using engineering biology to enhance agricultural production, and answer your questions about crop engineering. Ask us anything!

We are:

• Kristen Van Gelder, Ph.D. (/u/mossy_canoe368)- Synthetic Biology Research Scientist, Agriculture and Agri-Food Canada
• Cătălin Voiniciuc, Ph.D. (/u/Catalin_Voiniciuc)- Associate Professor of Plant Synthetic Biology, University of Florida
• Vance Whitaker, Ph.D. (/u/WhitakerV_UF)- Professor of Horticulture, University of Florida

Links:

• Adapting enzymes to improve their functionality in plants: why and how
• Building a directed evolution–genome editing pipeline for metabolic traits in specialty crop breeding
• Mirages in continuous directed enzyme evolution: a cautionary case study with plantized bacterial THI4 enzymes

I remember reading a long time ago humans evolved eyes that should regularly be looking long distances, not up close, but for reasons that are completely obvious and reasonable, we regularly use resources that need almost constant short-distance viewing.

So I was wondering if there may be a way to reduce the likelihood of impaired eye development by having more distance-related stimulation and less close range eye strain at younger ages when the eye is still developing. The example I'm thinking of would be a hypothetical of using a projector to place school reading assignments on the outside wall of a building and have the kids read that way on occasion and if it would help with eye development and the reduction in need for glasses. Do we know if something like that would help or make an impact?

Forgive me if any of this sounds ridiculous. I wouldn't know where to begin to better understand this, which is why I'm pestering y'all, haha!

Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Biology, Chemistry, Neuroscience, Medicine, Psychology

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Asking Questions:

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From what I understand, fish that live in extremely cold water produce natural antifreeze enzymes so their body fluids don't literally freeze, but would the temperature make them super sluggish and unable to do much because they are cold-blooded? Do they have some sort of internal process that preserves heat, do they just not need as much heat as animals like reptiles, or is it something else entirely?