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Questions tagged [space-mission]

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1answer
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How many orbits to catch up to ISS and Hubble?

To dock with orbiting satellites like the ISS or Hubble, how many orbits of earth do rockets and spacecraft clock up while they close in on their target satellite? Is the number highly variable ...
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1answer
35 views

I have a question about the gravity probe B geodectic precession formula and why it seems to be twice the planetary precession formula

Specifically, I can work out the planetary precession formula to give radians per orbit as 6*pi*GM/c^2r (and I find that on the web at places like http://farside.ph.utexas.edu/teaching/336k/...
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1answer
39 views

What determines the direction of an object that has undergone the effect of a gravitational slingshot?

I just started researching this topic and therefore I do not know much about it. Nonetheless, I am still curious about what determines the direction an object takes after passing by a planet. I think ...
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0answers
31 views

How is New Horizon able to send back data to Earth? [closed]

New Horizon is to send back images of Ultima Thule, 6.4 billion kilometres away. Barred having a very large power to send information back on a very large angle, it seems to me that the level of ...
1
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1answer
74 views

How can China put artificial moon if they're not in equator?

China plan to put artificial moon. I suppose the moon would have to be geo stationary in orbit. However, a geostationary orbit would be on equator and china is not on equator. So how would it work? ...
2
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1answer
30 views

Experiments in ISS

Recently a Japanese capsule brought back proteins that were created in ISS in the absence of gravity. Researchers will study them to "understand their folding better". My question is, regarding ...
1
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1answer
98 views

What is the minimum time required to travel 1 light-year from Earth and turn back? [duplicate]

Suppose I have a very powerful and durable rocket that is able to reach speed of light minus $10^{-1000^{1000^{1000}}}$ in $10^{-1000^{1000^{1000}}}$ milliseconds. Very instant acceleration. I can ...
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2answers
52 views

What direction would an engine spin in space?

I am working on a science project in school with a friend on artificial gravity in space. We are both wondering if we could use normal electric motors, to let the outer ring move. Since there's no ...
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2answers
54 views

Delta-V of Earth to Moon mission using Moon orbit

I have read this article here and it talks about the delta-v cost of travelling to and from the Moon. Importantly it says that getting to an orbit round the Moon, and docking with a space station, and ...
3
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2answers
72 views

Parker Solar Probe top speed

All the news articles say it'll orbit the sun at 430,000 mph. How do they get that? It seems too low. Isn't orbital velocity proportional to $1/\sqrt{r}$? Parker will be 4 million miles above the "...
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1answer
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6answers
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Why put a radio telescope in space instead on the Moon?

Why are we not building a space-based radio telescope? If a lunar radio telescope is hard to build, why not a space-based radio telescope? It could be an interesting tool, I presume. Thus, what could ...
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3answers
48 views

Would it be possible to invert a tokamak to make a solar probe?

I was just browsing random stuff on the internet, and I came across this article about the parker solar probe. The rhetoric was like "oh my, the sun is so hot but the probe won't melt.. etc. etc.", ...
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3answers
131 views

Do any of our satellites or space exploration craft need or use relativity for strictly navigational purposes?

I thought I read somewhere that everything we've ever sent into space used only Newton for navigation, because relativistic effects are orders of magnitude smaller than other causes of course ...
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2answers
85 views

Path to a distant star

Suppose we have a space ship that can go fast enough (0.9c) and we have plenty of time, and we want to travel to a star on the other side of the galaxy. How do you plot a path to navigate to that star?...
29
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1answer
5k views

Why is Anti-helium so important in the search for dark matter?

I've been reading/hearing that if the AMS satellite measures a significant flux of anti-helium in cosmic rays, that would be an irrefutable proof of dark matter. I was wondering: Why is that? what is ...
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3answers
3k views

Rockets in vacuum vs. Rocket on earth

Recently my physics teacher during a rant said something that piqued my interest. Heres what he said "There are more problems visiting other stars if you wanted a rocket to go 99% the speed of light ...
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1answer
1k views

How is Elon Musk's Tesla surviving in space? [closed]

I'm sorry I have to ask this question but I need evidence for a friend. My answer to her that I trust people who specialize in the field to know better than me is 'BS' to her. So to begin... My ...
11
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2answers
2k views

Voyager: Is it in “orbit” and will it return?

This Phys.SE question about Voyager got me thinking, and I didn't see an answer: Gravity - what goes up must come down. Will Voyager, in its current trajectory ever be pulled back into our Solar ...
25
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1answer
5k views

Why is Voyager 1 approaching Earth? [duplicate]

When I read JPL's mission status for Voyager 1 and Voyager 2 the distance between Earth and Voyager 1 is decreasing. Is it right?
119
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10answers
23k views

Why do spaceships heat up when entering earth but not when exiting?

Recently I read up on spacecrafts entering earth using a heat shield. However, when exiting the Earth's atmosphere, it does not heat up, so it does not need a heat shield at that point of time yet. ...
0
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0answers
52 views

Flyby anomaly observations: the Pluto case

Recently, the flyby anomaly was back in the Juno probe. I was wondering if the New Horizons probe also observed it. Any references for the New Horizons probe? Any idea if New Horizons could test it on ...
0
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1answer
62 views

Can Neutrinos be used in space telescope?

Can we use neutrinos in the modern electronic devices such as Telescopes for capturing images, which are far from current human reach?
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0answers
138 views

What happens to your pulse rate when you are in zero gravity in space? [closed]

I am new to stack exchange, this is my first post. To start with, what happens to your blood pulse rate when you are in zero gravity? Does it increase or decrease? I thought a lot about this but am ...
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1answer
61 views

Cameras in Voyager probes 2017 [closed]

Riffing off an old thread... Analog v digital and data transmission aside, I'm wondering how images were captured in such low light at 37,000+mph. Seems like a wide open aperture and slow shutter ...
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0answers
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How fusion reactor could be operated on space craft? [closed]

Considering that space craft uses engines only during acceleration and deceleration, how fusion reactor will be operated? For example: it will be started / stopped for each maneuver will be working ...
3
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1answer
281 views

How is the Falcon 9 aerodynamically stable while ascending?

How is the Falcon 9 aerodynamically stable while ascending? The rocket doesn't look like it should be able to fly straight. With the large, largely empty fairing at the top and the heavy engines at ...
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3answers
1k views

Parker Solar Probe passing extremely close to the Sun; what relativistic effects will it experience and how large will they be?

note: This is a question about relativistic effects. I've included some detail about the spacecraft and its orbit for background, but the question is about relativistic effects and their observability....
1
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1answer
62 views

Heat shields and the atmosphere

Space capsules and the Shuttles were equipped with heat shields to protect the spacecraft and those on board from the tremendous heat generated from friction as they reentered earth's atmosphere at ...
0
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3answers
142 views

Is there a way to survive the extremes $g$ forces near a black hole?

On my understanding what kills you near a black hole is the proccess of spaghettification due to the extreme gravity. To avoid this my suggestion is to create a spacecraft that can get to 99.999% ...
55
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8answers
11k views

Is it possible to send all nuclear waste on Earth to the Sun?

If we neglect the danger of unsuccessful lift-off of the rocket and the cost, would it be physically possible to send all nuclear waste on Earth to the Sun? Will there be an obstacle that prevents ...
2
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2answers
139 views

Would it have been possible to send a manned mission to Mars using Apollo technology?

To clarify, I am writing a science fiction story in which a manned Mars mission in 2025 discovers a previous manned mission to Mars sent in the 1990's using modified Apollo lunar technology. Even ...
4
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2answers
145 views

Is it possible to aim from earth to Alpha Centauri?

This question came to mind after hearing about Starshot: Basically you take small spacecraft and accelerate them to 0.2c and make them fly for a few years to Alpha-Centauri at which point it then ...
29
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4answers
2k views

How long would a bubble made in the ISS last?

It seems to me that if on Earth soap bubbles pop, it is because the gravity makes the water and soap go to the bottom of it. When there is not enough water at the top of the bubble, it pops. But ...
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5answers
3k views

How much damage would a space probe cause?

How much damage would a space probe cause if it can get about 4 lightyears away in 10 years and doesn't have any brakes when it arrives? Could it cause a global extinction event on the planet it was ...
2
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2answers
48 views

Binary satellite system to approach low orbit

After hearing the exciting news about discovery of a new earth like planet, It is becoming more of an urgent need to come up with more efficient ways of sending probes to investigate new planets. ...
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2answers
79 views

Can AMO physics be applicable for space travel? [closed]

I know it sounds very stupid question. I am working on the AMO physics (Quantum Optics). I recently saw articles about the Spacex, and I thought it is really amazing, and thinking about the possible ...
3
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2answers
109 views

Why are they building eLISA and what implications would it have?

I understand that the next step after LIGO is to plan and build eLISA, I understand that out in space there are a lot less interferences compared to Earth which makes it a good way to detect things we ...
4
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2answers
624 views

What will happen to a human being exposed to Martian atmosphere?

Mark Watney, in the movie The Martian, says that, If the HAB breaches, I'm just gonna, kind of... implode. The corresponding novel, by Andy Weir, says he will explode (as pointed out by @...
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1answer
94 views

How to calculate max temperature craft needs to withstand near the Sun

The Solar Probe Plus fact-sheet states that the craft will approach to the distance of 9 solar radii to the surface of the Sun (Approx 6.26e6 km) and its heat shields must withstand 1644K of heat. I ...
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2answers
2k views

Does the International Space Station always travels in the same path?

From the 3d visualization http://www.satflare.com/track.asp?q=25544#TOP (the right image with the red line indication the path of the ISS) it looks like always the ISS takes the same path. Is it the ...
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4answers
2k views

Could we launch a missile from a planet with the mass of Jupiter?

If the Earth had the mass of Jupiter, would we be able to launch a space missile ? Is there a formula to calculate how the launch of 1-Kg payload increases with gravity?
5
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1answer
327 views

Why do they think WT1190F is low density?

A piece of space debris WT1190F is in the news in part because it has been far from earth (farther than lunar distance) in the past but will re-enter earth's atmosphere in a few weeks. See this open ...
3
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0answers
817 views

Does the “luk” space suit in Seveneves make sense?

Tiny spoiler of the book Seveneves ahead. Early in the book, the Russian space agency develops an onion-like space suit called the "luk" (the Russian word for onion). It works like this: A ...
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0answers
78 views

Has New Horizons' visit to Pluto taught us anything deeper than mere… facts?

There's a lot of interesting stuff coming from New Horizons about Pluto, but are we actually gaining any non-trivial scientific understanding from it, or is it all just "oh neat, Pluto has mountains ...
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1answer
315 views

How many days it takes to travel to Cygnus? [duplicate]

BACKSTORY I read today newspaper and made discovery of planet Cygnus (in news paper of course :v) that human can live there! The distance is 1400 Lightyear. Assuming I travel with the world fastest ...
1
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1answer
557 views

Effects of relativity on New Horizons spacecraft

How much would an atomic clock on board the new horizons spacecraft drift in comparison to an atomic clock on the surface of the earth near the equator after the spacecraft's 10 year journey to Pluto?
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1answer
579 views

How does NASA determine the position of their probes?

I'm currently following New Horizons visit to Pluto. I'm just wondering how does the Probe/NASA determine the Position of the Probe? I would assume using earth's GPS wouldn't have the necessary ...
6
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1answer
161 views

ISS live stream 'experiments' explanation

I am not sure if this question would be appropriate on Physics.SE (or SE in general) so please redirect me if necessary. I have been recently watching some of the International Space Station live ...
2
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1answer
181 views

How is possible to hear mechanical sounds in space?

In the footage taken by U.S. astronaut Terry Virts during spacewalk (EVA) on the International Space Station on 25.02.2015, sounds can be heard while in space. I can understand "shaking" sounds while ...