Questions tagged [space]

The near-vacuum extending between the planets and stars, containing small amounts of gas and dust. Also called outer space to refer to the physical universe beyond the Earth's atmosphere.

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Can we change the trajectory of a body in space using external means?

Suppose a block of metal is floating around in space....can we change its trajectory by external fields?Is it possible if yes then by what type of waves?
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Hybrid torus as an active space radiation shielding

Lately, I was studying the possible methods for protecting astronauts and onboard equipment in a spacecraft from space radiation which mainly comprises solar particle events (SPEs) and galactic cosmic ...
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When Measuring Altitude for a High Altitude Balloon does Temperature Matter?

When I look at the High Altitude Ballon results from people online that have launched DIY balloons (that have posted their data) I can see that their claimed top altitude (based on the pressure they ...
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Can astronauts experience “Hot sauna with cold plunge” in outer space?

I was reading an answer from a NASA scientist, that the sun facing side of the spacesuit could reach temperatures as high as 121 C, and the dark side, upto -157 C. (https://www.quora.com/How-do-the-...
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What is actually breaking the ozone layer?

My question is about the ozone layer. Is it possible that sending rockets out to space can damage the ozone layer?
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What is the total mass of orbiting interplanetary unbound atoms in the solar system?

Excuse the poor phrasing of the title, but it became apparent to me that the solar system has some degree of density (i.e it is not a perfect vacuum). So my question is if any of these particles (not ...
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How to simulate an explosion in space [closed]

I have a simulation of some bodies orbiting each other in space, and I would like to add explosions to it to see how the behave, but I don't know how to do it. Sorry if this is has been asked before, ...
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Physical meaning of angular spectrum

I have been going through the paper Diffraction from an irregular screen with applications to ionospheric problems. H.G. Booker, J.A. Ratcliffe and D.H. Shinn. Philos. Trans. Royal Soc. A 242, 579 ...
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Variation of phase across the wavefront

I have been going through the theory of diffraction of radio waves when passing through the ionosphere, when I came across the following statement: the amplitude of the wave when it emerges from ...
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Nutation angle calculation of spacecraft

I need to calculate the nutation angle of a spacecraft for different timesteps. I have a file which gives me the angular velocity $~w = (w_x,w_y,w_z)~$. When no torque is applied, the inital angular ...
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Reaching outer space using earth's air pressure, then rockets

Please correct me in my methodology if I am wrong, I am only in Physics I right now... This question has been daunting me for some time, but wouldn't it be a whole lot more efficient to send cargo ...
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How would a nuclear explosion really operate in outer space?

(Repost from RPG.SE, per the community's suggestion.) A friend recommended I post this question here - said I'd be more likely to get a useful response than, say, from Reddit. My question is: How ...
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Passive heat shield possible to stabilize performance of high tempetature range supercapacitors on Moon?

On the Moon surface, the temperature can oscillate between -160°C and +130 °C. As I can see, there are high remperature range supercapacitors available to work between -55°C and +200°C. Research ...
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How can we use the vacuum of space to transport people to space like a vacuum cleaner?

Ignoring the challenge of making a 100 km long tube to space, here's the plan we will need a 100 km long tube and at least a meter wide or less A base which will do the job of creating a vacuum in ...
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How far can radio waves travel in vacuum? and light waves?

Radio wave and light wave are the same thing. They all are electromagnetic radiation, the only difference between them is frequency. My question : 1, is there any photon-like thing for radio wave? 2, ...
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Effect of anodisation dye colour on absorptivity-to-emissivity ratio of aluminium

Anodised aluminium is a common material used in space, and it is commonly dyed black as this gives it an absorptivity-to-emissivity (a/e) ratio close to unity. This page says black anodic films have ...
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What would it look like to be inside a small space with positive curvature?

Say you're floating in an empty void with a light source. The space you are in has a positive curvature, so going forwards will bring you back to the place you started after about 20 meters. What do ...
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Apparent temperature of the universe at relative speeds

Suppose you are in a vessel traveling at relativistic or near relativistic speed relative to your local galaxy--whatever is physically reasonable, and won't get rapidly torn apart by high energy ...
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Modeling the distance between two point masses in space with gravity as a function of time

Assume that there exist two point masses in space, an isolated system with only gravity acting. I wish to find the distance between the masses as a function of time. I have arrived at the result of $$...
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Carbonated Drinks in Lunar Habitat

I'm curious how a carbonated drink would behave within a Lunar habitat. Let's assume that we have a stable temperature and atmosphere. The sole differential would be the gravity. I know from other ...
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Configuration space VS Euclidean space [closed]

Why Configuration space is non-Euclidean space? Why it doesn't look like an n-dimensional Euclidean Space in General? Thanks
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What would happen to the water bodies if gravity ceased to exist on Earth?

If water stopped flowing (it would stop flowing downwards from mountains and all) then, would it start rising upwards? If it floats on the space ( I say space because there'd not be any atmosphere) ...
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Materials with good thermal insulating properties

I'm doing a research for a university project. In particular I'm looking for a "commercial" material (so a material that is available on the market or can be home made) that has good thermal ...
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How do you calculate control moment gyroscope movement in space?

Sorry, if this is the wrong place to ask this, but I read that the space station uses control moment gyroscopes to maneuver in space. I understand that it uses the momentum, but is there a formula to ...
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Force required to propel mass in vacuum [closed]

I'm not mathematically inclined. At. All. I'm a massage therapist and mental health provider. I am, however, writing a book that takes place in space. My main character (MC) is 4'11" and weighs 95#/~...
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Coordinate axes, convention, and the isotropy of space

Say something has cylindrical symmetry so I align it on an axis to take advantage of that symmetry (this will make things like calculating the volume of a cylinder much easier if the $z$ axis pierces ...
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Lasers to direct waste heat?

I've been thinking about ways to cloak ships in space, since they all are warmer than their background they can be seen in the IR spectrum (given a large enough telescope). So I was thinking, could ...
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Proportional Relationship Between Velocity and Radius of a Balloon? Radius of a Parachute?

So I need to know the proportional relationship between velocity and radius of a parachute. I am building a near-space balloon in physics class and have to do some claculations. How do I do so using ...
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how do we navigate space without knowing the position of everything? wouldn't the gravity affect the sattelite/ship?

I tried looking for other questions but I couldn't find any. (if this is a duplicate, then I'm sorry, I just signed up, so I'm not sure what to search for) I was wondering, how do we navigate into ...
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How well can current physics predict the movement of rocks in space?

I have a question about the precision of predicting the movement of objects in space (which I believe fall under physics and not space exploration). While I suspect the main limitations here are ...
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Calculating the shielding required to protect against radiation at lunar orbit

I am attempting to calculate the thickness needed to protect the crew inside a space module at the Lunar Orbit with Lithium Hydride from X and Gamma Rays. How would I calculate the thickness of Li-H ...
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Why do people think that rockets can thrust in the vacuum of space? [duplicate]

A force is required to change the momentum of the rocket exhaust which consists mainly gas moving out of the rocket chamber. People think that it is the rocket that pushes the gas out. If this were ...
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Can space be considered as a grid of cubes of planck length, or is it continuous? [duplicate]

I don't know how to describe it exactly, please try to understand. The question is if space is continuous or gridded. Consider a particle of planck length (or whatever is the smallest possible ...
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$F_n$ force between 2 objects in space

I am trying to do a research project for school where I'm trying to simulate the physical world in a computer environment. So far things have been working great but I have trouble understanding how ...
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Is the Gravity Turn the most efficient way to put a spaceship into orbit?

The Gravity Turn is a maneuver used to put a spaceship from ground into orbit. It can be described as lifting the spacecraft vertically up, then tilting it towards the desired orbit by a small angle ...
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What are the relativistic arguments for existence of space? [duplicate]

One of the interpretation of special relativity states that the time is an illusion and does not really exist. This interpretation promoted Einstein himself in his condolence letter after the death of ...
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Diffusion of a color through a liquid in zero-gravity environments

There's a video of an astronaut putting a droplet of food coloring into a blob (sphere) of water on the ISS. The water turns the color of the dye almost instantaneously. On Earth that dye would slowly ...
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What is in space?

I was recently on a chat server having a random discussion about science stuff and someone I was talking to then made the comment that "space is not a complete vacuum and it's full of plasma / matter"....
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Can space be compressed in an empty bottle?

On a spacewalk, in a vacuum, if an open empty water bottle were capped and squeezed, would it pressurize or collapse as if it were not capped?
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Why human knowledge about small scale physics is growing much faster than knowledge about big scale phenomena? [closed]

According to Kardashev scale there are subzero types civilizations according to their expertise in small scale physics (e.g. nanotechnology), which are classified according to Wikipedia as: Type ...
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Ice formation in a cavity that was sealed at ambient condition and taken to space

I have a hardware with a cavity that was closed (welded) at ambient conditions (298K, 1 bar Pressure and 50% RH). The hardware was taken to space where the temperature can go down to near zero Kelvin. ...
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Fire-powered thrusters? [closed]

So recently I have been working on a science project for ideas that could possibly help in space expeditions, and one of my ideas would be a rocket that would be powered by flame, anyone here have an ...
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Is there something like a fixed absolute position in space

Imagine a spacecraft floating around and everything else in the universe gone. Could the people on the spacecraft figure out if they are sitting in one place or are moving in the nothingness without ...
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If a gyroscope is provided a torque in space, what will its motion be after the torque ceases to act?

As there will be no energy dissipation, where will the kinetic energy of precession go as the gyroscope can't precess in the absence of a torque? Thanks in advance!
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If Time and Space are intrinsically linked and space is ever expanding then surely time is slowing down [duplicate]

When we try to imagine the initial expansion after the big bang we see with the CMB that the universe went from initially smaller than a hydrogen atom to what we see today. However, when we try to ...
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Does more light from Andromeda get scattered in the atmosphere than in the entire trip to Earth?

Fires have been burning here in Northern California. Today there was just a slight haze of smoke. The sun had a slight red hue to it. As expected the lower it got the redder it became. The blue light ...
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How big of a Artificial Magnetic Field would be needed for Mars to be shielded at L1?

I was recently reading an awesome Paper that details a possible process for restarting the Martian atmosphere. The paper explains that a Sufficiently Sized artificial magnetic dipole of 1 to 2 Tesla ...
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Could you generate a lot of electricity in space? [duplicate]

I was just thinking about the fact that if you threw a ball or any object out into space where there is no other forces or gasses it would continue on forever, so say you had a turbine and you spun it ...
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Can I avoid spaghettification with a spin?

I am aware of spaghettification effect caused by entering a black hole, as well as fundamental physics of an object in space, so here is my theoretical construct: if I place an object in space where ...
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Expansion of the time dimension [duplicate]

Given that the universe is expanding in the three spatial dimensions, is it possible that the time dimension is also changing over time? If the rate of the passage of time is changing over time, ...