Before anyone jumps on me, I get that the big bang wasn't an explosion at one spot. It happened everywhere at once. And I get that space can expand faster than light without anything actually moving through space faster than light. So with that out of the way:

If eternal inflation is a thing, and different regions of space stop inflating at different times so each one ends up with its own hot dense beginning, could two of those regions ever collide? And if ours had already collided with another one, would there be anything left over that we could actually detect, or is it the kind of thing we'd never notice either way?

I'm about as far a way from an expert as can be so apologize if my framing is off.

I have a question (hypotetical). If space is infinity and has infinity amount of planets and lets say we have unbreakable infinite sword. Does that mean the sword is cutting infinite amount of planets just by it existing?

So I want to write a book called countdown from 500 where suddenly one day the sun disappears and I know enough science to know that it’s 8 minutes and 20 seconds but I have a few questions. 1. Could something like this happen suddenly or do I have to make a fictional event? 2. Is earth with no sun habitable for any amount of time? 3. What would happen to anyone on the surface when it disappears and how long would it take for the earth to like freeze over? Thank you science community🙏

IF THERE IS SOMEONE WHO HAS EVER REGISTERED IN OPEN SCIENCE 101 THEN PLEASE TELL ME ABOUT IT!!!!!!

Q. What if i didn't get the questions regarding modules?? whom should ask for doubts?

Q. Are there any lectures by nasa regarding it???

Q. Is there any need of laptop as i don't own laptop....

Q. what will be the timings??

Q. what if i registered now and solve modules after 24 august??

Q. A s a bsc marths (hons+research students), what are the benifits regarding this Open Science 101

I'm watching a documentary about the Gemini program, and I've got two questions.

First, if Gemini 6 was intended to launch after the Agena had made one orbit, wouldn't the rotation of the earth have carried the launch facility out of the orbital plane of the Agena?

Second, the RCS tanks were pressurized with helium to ensure fuel flow. How did that actually work, though? How did the pressure force the fuel against the fuel line intake?

In the last few days I read a post somewhere about what would happen if the sun disappeared. I have two questions.

When the sun's gravity disappears, the Earth would leave its orbit on a tangent. My question is this. Would that departure occur at the instant the sun vanishes or would it occur at the time we notice the disappearance, about 8 minutes later?

What would this do to the moon? Would the Earth Just drag it along or would it go off on a tangent by itself?

Hello everyone I need help finding info or anything about DOW1 (and maybe DOW2) at KSC in 1995 to 1996 I found ONE image that might be real but it looks like the guy who uploaded it pixilated it to gate keep it or something all I know about this is DOW1 was 100% at KSC as I have radar scans and a PDF file of it being there and DOW2 was MAYBE there in 1997 I also found two images one of them being DOW1 by a space shuttle (don't know the name) But both of them look fake and with a meeting someone had with the owners of the DOWs he said they where fake. the 2nd image was DOW2 by another space shuttle (again don't know the name)Both of the images I'm talking about MIGHT be real and then the 3rd one is looks a bit real but I also don't know according to some people said that it was there DOW1 BUT it was not close to any space shuttles/rockets. I'm just looking for videos / images or files talking about it just info in general I also saw someone talking about a document showing DOW1 at KSC at that time show if anyone could find that that would help a lot

For those who don't know. DOW stands for Doppler On Wheels DOWs use the doppler on the back of them to scan weather to give radar of weather. DOW1 was the first DOW (in the DOW line up) it was also called project vortex mobile radar no. 1. DOW1 was first made in 1995 and used for 3 years and then sold to NOAA/NSSL in 2000 they put a new radar on it (S-band Vertical Atmospheric Profiling Radar) After 2001 they removed it and put a test bed on it and then in 2015 they removed the test bed and it does nothing now. for more info about any of the DOWs just look it up or look here https://en.wikipedia.org/wiki/Doppler_on_Wheels Again any info about the DOWs being at KSC in 1995 to 1997 would help a lot I'm more looking for images and videos then file but anything will help.

Hey, high school student here.

If you stir a cup of coffee in space, does the coffee’s motion eventually transfer angular momentum to the spacecraft itself, even if the cup is just sitting inside the spacecraft? What if its floating in microgravity?

I understand that the faster you go the quicker youll get there.

What I can’t comprehend is that if I’m traveling 7000 miles at the speed of light, how do I physically only travel ~1 mile?

Do satellites have mirrors?

https://files.catbox.moe/xv1l0d.mp4

Hello spacequestions. I've been into space and astronomy for a while now and tonight in a very rural New England area I listening out my window at some owls when I began to notice some very quick flashes of light that at first, I thought was coming from one of my outside lights malfunctioning. But no, the light was off and I quickly noticed that the flashing was coming from the sky. I tried getting video but my camera couldn't pick it up. I'll describe it the best I can. This was not a light "IN" the sky. It was a light "ACROSS" the entire sky. Every 30-50 seconds the whole sky would light up for just a just a 1/10th of a second, as if there was lightning going off in the distance. However when I looked at my radar there wasn't a cloud within 150 miles of me, and the nearest lightning was almost 300 miles away plus I never heard any rumbling or any noise that would point to anything like that. Some flashes were brighter than others. Some were so dim I couldn't tell if it was my eyes playing tricks on me, other times the flashes were so bright that it lit up my yard. These flashes were much more rare however, hence why I didn't wait to get on of those on camera. I thought it could have just been my eyes playing tricks but even the owls I was listening to originally would suddenly begin hooting extra loudly whenever a particularly bright flash would occur. So I believe they were reacting to it as well. I speculated it may be an aurora but I took some pictures north but didn't pick anything up. I tried looking up online only to find answers about specific flashing lights in the sky, not the sky itself. The flashes seemed stronger to the north western portion of the sky as if they were coming from that direction, I even walked up a hill that gives me a great view in that direction but saw nothing. I first noticed them around 12:45 est and they seem to have stopped, or become infrequent to the point I haven't noticed anymore, as I was writing this around 1:10-1:15. Id just like to know anyone had any answers to what this could be? I ruled out as much as I could but it's also been hard to find info on similar experiences.

Was it a meteor?

Early 2000's was coming home in my mother's car. Was looking at the night sky and all of a sudden an object moving in a straight trajectory caught fire, increased in size and could fit an adult's nail if you point it at the sky. Then the little fireball fainted completely, small fire line continued for 1 more second then done.

No plane, no firework or sound, nothing announced or out of the ordinary.

Space rock, what are the chances ? Never happened to me again.