r/spacequestions

Would you go to the moon with Artemis 4 as a civilian that has won a lottery ticket

Fun hypothetical

Rules:

1. you must quit your job and train full time with the crew
2. You must relocate to Texas during your training
3. you must get into reasonable physical shape
4. pay is 60k a year

All risks remain the same in terms of chance of crew loss, radiation exposure, etc

Do you go?

I’m not looking for conspiracy theories with no evidence. I’m looking for legitimate concerns and questions.

I’m also looking for an answer to the raditation belt issue. Why do so many people think we haven’t developed materials to block the radiation?

Hey guys, I'm bread 🍞 I have a little doubt. And please correct me if I'm wrong. What if the universe is like a yo-yo. I mean we know big bang happened so after that explosion or something else universe kept expanding. But what if after certain billions of more years later the speed starts to deplet very slowly and more years later it gets reversed causing the universe to contract. Many galaxies collide etc. And when the universe is at the brink of being shrink into nothingness it explodes or expands again. I'm sorry I don't know much about quantum mechanics and physics so it could be wrong. Sorry for wasting your time

So I know you can't travel faster than the speed of light, but does that apply from a relativistic perspective? I'm trying to understand the Lorentz Factor.

Assuming infinite energy. Obviously that will be a physical constraint regardless.

Like, if I'm going to the nearest star system that is 4.25 light years away but going .866% the speed of light, do people on earth see me get there in 4.91 years but from my perspective only 2.45 years have passed?

If that were true, I would be able to go .979% of the speed of light, get to where I'm going, come back, and then watch myself land there (with a hypothetical telescope capable of looking at something 4.25 light years away) three years later?

That can't be right, so it must be that, traveling 4.25 light years at .866% c I must see the trip as taking 4.91 years whereas for people on earth it looks like it takes 9.82?

The main thing I'm wondering is, with hypothetically infinite fuel, ignoring limitations of the g force of accelerating to near light speed, if I was traveling at .99999999999% of the speed of light, add a couple 9s as necessary, could I reach the edge of the observable universe within my lifetime?

Since the one from 1977 is still going, why don’t we send more out there with updated materials/capabilities?

The seasons are caused by earth's tilt, I know that. What I don't understand is why the hemispheres alternate being closest to the sun.

For example, say the northern hemisphere is in summer and it's pointed to the sun. Why is it pointed away from the sun in winter, instead of always pointing toward the sun? Does that make sense? Like, why doesn't the earth spin that way, too?

Does it have to do with earth's or the sun's gravity? If the northern hemisphere were more dense, then would it always be towards the sun because of the sun's gravity?

I'm an environmental science nerd, not exactly a space nerd-- though I know the two are closely related. Either way, this is confusing. If you understand what I'm trying to say, please help me out 😅

Among the many hazards of space travel will be bone and muscle loss due to low gravity. To counter this can’t astronauts wear weighted vests to simulate earth gravity? Obviously this won’t work in space but on the moon or Mars it could provide health benefits. Say on the moon I weighed 1/6th my earth weight, then if I wear a jacket the same weight my muscles will be pushing 1/3rd of my weight around. Still not ideal but it would reduce the impact of low gravity. Also you wouldn’t have to send a jacket with every astronaut, just the fuel to launch them once to a base and various astronauts can cycle through the jackets as their missions require.

Genuine question. My intuition says:

Spacetime is static and eternal, that it has always existed, it doesn't expand. Matter has always existed.

The Big Bang was just the most recent "bounce", and all matter collapsed under gravity into an extremely dense point, pressure became so extreme that all structure broke down to fundamental particles, and exploded outward again. Full reset every cycle.

In this model, redshift is just Doppler, matter moving through static space, not space itself expanding. There is no speed of light barrier for matter, c is simply the propagation speed of electromagnetic waves through their medium, like sound through air. Time dilation is a mechanical effect of gravity and motion on physical processes, not time itself changing.

You wouldn't need dark energy, the accelerating expansion is just residual pressure from the bounce, still driving matter outward.

It requires hardly any new assumptions. No creation from nothing, no singularity that magically appears, no invisible forces invented to fix the math. Just gravity and matter doing what they do, forever.

Why is "everything came from nothing 13.8 billion years ago" considered more scientifically rigorous than "it has always existed in cycles"? Both fit the observations. One requires a miracle.

Let’s say it’s 100+ light years away

I just saw a Brian Cox post where he said Earth was not born with water. He explained that water may have come from ice/comets hitting Earth over millions of years, and some also came from volcanic eruptions because hydrogen and oxygen were trapped inside Earth.

My question is: how do scientists even figure this stuff out? How can we know what happened billions of years ago if nobody was there to observe it?

Also, if Earth was being hit by ice asteroids/comets for such a long time, why doesn’t that happen now? Did those objects disappear, or are we still getting hit but on a smaller scale?

What kind of evidence do scientists use to come to these conclusions?

Edit: Thank you to everyone who replied. In retrospect, bit of a silly question, but I wanted to be sure

As the title says, would a space station or settlement or whatever (let's say an O'Neill cylinder or similar) need to orbit around a planet/moon/other celestial body or could it just be free floating in interstellar/deep space?

If it were just floating around on its own in space, how would that work exactly? Would it just kinda drift around, slowing floating in an arbitrary direction?

Thanks :3
(I'm asking for the sake of a sci-fi thing I'm writing)

Horrible way to phrase it but I dont know a better way. Im wondering if the moon is perfectly tidally locked or does it wobble a bit and some parts come / go slightly?

Bonus question: if it does wobble, would over time the parts that do face us change over millions of years or so?

Like why haven't we sent a probe with a super good camera giving live footage of say Jupiter and Saturn like how we see Earth from the live ISS feed?

If humanity found out the sun was going to explode in a 100 years. Would the combined effort of the whole world and all its money/resources be enough to create a way for humanity to survive?

- what could we build to survive as a species?

- if 100 years is not enough how long would we need?

I think if nasa wants to create a moon base I think we should have an unmanned space station somewhere halfway along the path to the moon carrying fuel and supplies and lower it's orbit when it needs to resupply thoughts?

Like, isn't it just a giant ball of burning helium? How hasn't the sun gone out yet? Like, there is no atmosphere so no air so there shouldn't be anything keeping the fire alive and if it is burning off the giant gas of helium how didn't it burn out in an instant? Like make a giant explosion of fire and dissappear?

I hope this isn't dumb. I see a lot of posts saying an asteroid could kill us anyway, or a wandering black hole, etc etc. But these feel like things we could predict at least. Is there anything that could happen without any given warning and just wipe us out?

Could black holes send people back in time?

I'm looking to buy/finance an entry level rocket ship.
Looking to travel to low-orbit or possibly a little higher. I don't care how it looks, just needs to get me there. My family has a semi-large fortune and I'm looking to be the son in the family that grows the family wealth and does something with my life worthy of writing down.
If mark rober and Mr beast can go to space, what's stopping me lol.
On a more serious note, anyone who knows anything, please reach out. Here is a list of who I need to find help out with this project:

1. Landowner with launchpad capabilities. Must be willing to sign waiver for release of liability.
2. Someone with connections to the oil industries
3. Someone with connections with NASA/SpaceX/ similar.
4. An intern interested in astronomy
5. Food/water prep professional
   I have friends who are engineers who can handle the implementation. I only need the list above.
   Serious inquiries only.
   Thanks in advance!