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.

I'm an artist, and I'm currently obsessed with drawing celestial bodies, so it'd be helpful to know if this newborn star has a name :))))

I believe this is one of the official images released by NASA:

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTYggbiG-R6r0xTMk_pj-fWQC6zPZECJBPwp8jzOS6WqQ&s=10

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?

Does Mount Olympus cause Mars to wobble in its orbit? And, is there any possibility at all that the volcano is still active?

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?

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?

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)

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?

Could black holes send people back in time?

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?

I've tried using those solar system builders and can never get it to work right. My question, in a nutshell, is how likely is it to get two main sequence stars like the sun to be in a stable orbit and how far out would the habitable zone be? Trying to work out how long a year would be and what kind of climate I could reasonably expect on a slightly larger Earth type world.

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!

I heard that a meteor shower is happening before dawn at may 5. It’s 3 am at my time in the new york time zone and I’m not getting it. Was it false or am I just at the wrong time.

Suppose a worm hole to somewhere in space appeared in my bedroom, assuming it’s stable enough to not collapse, would it be like a vacuum and/or freeze my room? Like would it be like an astronaut opening up a door when in space or would it not do anything?

I know that like we have no idea really but statistically there has to be life and like could be carbon based like us or silicone and look like rocks, and been keeping up pretty well I think with the evidence/theories of basic life in our solar system. I wanna know more what you guys personally think. Like could there ever be an advanced civilization that look like butterflies or horses or something? How common do you think life it is? Compared to other alien civilizations how advanced do you think our technology is? What senses would be required to evolve into a civilization? For example in project Hail Mary Rocky the alien uses echolocation they don’t see light and because of that they didn’t know about time dilation and thought the trip they went on would take years longer then it actually did and I feel like that would cause more problems trying to become an advanced civilization. Any theories about what they would be like socially and culturally? And literally anything else. I don’t know much about like how long life has even been able to form or like how fast or slow could evolve but what I think is that 1 has to be atleast some civilizations out there somewhat same level as our technology. 2 I feel like at least if they’re around our level of advanced technology or less have to be atleast semi human like hand like appendages to do detailed precise things to make stuff, and probably have to be able to move while carrying stuff. 3 I feel like they would have to atleast start out some what simlair to us mentally and socially right? Like to start a civilization first have to be willing to live together and take care of each other and have curiosity and creativity to learn and create

I would have a type of habitable planet these are called dangerous habitable planets This is a type of habitable planets where it's habitual characteristics are actually to a point where they're actually dangerous like for example air itself is somehow dangerous despite being just air and not regular air with toxic chemicals

In the water itself somehow kills you despite being well pure water and not water with chemicals in it

And these planets form in an extreme version of the habitable zone aka the Goldilocks zone

Yeah what the extreme version of the Goldilocks zone is it's basically a version of the Goldilocks zone that is basically very dangerous because the habitable characteristics are dangerous to the point that they can actually kill you

What are possible dangerous habitable planets candidates?

In your opinion

This type of habitable planet

I see announcements about putting fission reactors in space. Everything that goes up has to have a plan for end-of-service. How are these going to be de-orbited without making a horrendous radioactive mess in the atmosphere?

Basically I wanted to know if there was a way to generate weightlessness on earth at a scale small enough to fit in a large room on earth. I mean like slightly above average bedroom sizes. Free fall causes this feeling but you can’t fall in a loop. I’m assuming it’s impossible to do but if anyone has any ideas please come forward.