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Questions tagged [deep-space]

Questions about deep space travel and observations that are related to the distance between the object in question and the Earth. For example, questions about communications delay, radial resolution, means of propulsion through the interstellar medium, e.t.c. Deep space does not exclude space near or around other celestial bodies past our Solar system's heliosphere, and should not be confused with the term "interstellar".

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163 views

Would it make sense to design a standard stage for deep space missions?

There are standard launchers and standard upper stages used for many different missions within cis-lunar space. Deep space missions are so rare maybe it makes no sense to try and come up with ...
8
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1answer
455 views

Autonomous Navigation for deep space missions

Autonomous navigation started in early phases of deep space exploration as a provision to achieve accuracy for planet/natural satellite targeting and approach, where radio tracking accuracies were low,...
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1answer
354 views

Is there any space objects database? [closed]

I wonder if is there any databse about space objects, giving information about types and may be relative positions of objects in space. I'm asking this because my company aims to develop a software ...
12
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1answer
518 views

Was there ever a non-sterilized probe sent to a celestial body?

A shootoff from my other question, has there ever been a deep space probe that was not sterilized to prevent micro-organism contamination of the celestial body? I'm thinking early space age history, ...
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4answers
7k views

Why do deep space probes have to be sterilized?

Correct me if I'm wrong but a probe to Mars will take months, during which time it's exposed to a vacuum and irradiated by the sun. It sounds to me like this would kill any micro-organisms on the ...
9
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2answers
977 views

Interplanetary ranging accuracy?

What are the two or three most accurate technologies used to determine interplanetary spacecraft distance (e.g. Doppler / radiometric tracking...), and what accuracy is currently obtained from such ...
5
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1answer
856 views

Error detection and correction techniques on New Horizons data

As New Horizon's signal is so weak, probability exists of errors in detected signal. What error detection and correction codes are used in the signal? Is it known, what is the error rate in received ...
4
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2answers
662 views

How can we form a data-communication relay chain for deep space exploration?

The power that deep space probes have allows an RF communication capacity of a few kbps from a range like Pluto-Earth. If we go into optics, the range will be better. But, of course, we want to send ...
4
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4answers
672 views

Has any probe ever been launched into a highly elliptical orbit with say 20-30 year to orbit the sun?

Why has no one launched a probe that goes into a highly elliptical orbit around the sun ( on a path that goes beyond Pluto without escaping the sun's gravitational field) and capture images as it ...
2
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0answers
73 views

Why are space probes / satellites data rates so low? [duplicate]

The New Horizon's data transfer rate is only about 2kbps right now. At its peak the rate was 38kbps. Why is this transfer rate so slow? Is this due to using radio waves, limitations in the data relay, ...
2
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3answers
189 views

Is it possible to have a satellite that bounces data back from sattelites farther out in the solar system?

Say we put a satellite in orbit around Neptune or Uranus that simply stores and sends data back to earth? Like as a big range extender for missions like New Horizons that work so far out that ...
21
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2answers
1k views

How precise must be the antenna orientation to communicate with a deep space probe?

I guess that everyone is familiar with the problem of aligning a TV satellite dish: some degrees off and the signal you desire is gone. How sensitive is communication with deep space probes to this ...
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2answers
348 views

What type of data did New Horizons send to Earth in order to diagnose the switch to Safe Mode issue?

Recently, the New Horizons spacecraft on its way to Pluto suffered a "hard-to-detect timing flaw in the spacecraft command sequence." Does that mean that it was a multi-threading error or something ...
3
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2answers
363 views

Can a column of water pointed at the sun be used as a shield from solar flares?

There is an idea to use shadow radiation shielding for deep space craft to protect the crew in case of a solar flare. Will it work, and will it save mass?
7
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1answer
241 views

Navigation within solar system

I know star trackers are used in most cases for attitude determination of space craft traveling within the solar system. But what methods are currently used for coordinate determination, i.e. the ...
1
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1answer
45 views

Diurnal Signature of Earth in Angular state tracking

'Diurnal signature of the earth related to the the rotation of the earth is utilized and 24 hours of amplitude and phase data is used along with Ranging and Doppler shift data to calculate Angular ...
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2answers
219 views

Can a single-apparition comet be used to propel a deep space probe outside of our solar system?

It seems this would be an economical way to explore anything beyond the heliopause, given that the probe would carry limited fuel.
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1answer
4k views

Delta-v of deep space maneuvers in deep space missions like Voyager or Pioneer

What are typical delta-v for deep space maneuvers, used by deep space missions to outer planets or for "interstellar missions" ? For example, Voyager 1 now has 17 km/s speed relative to the Sun. What ...
3
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1answer
192 views

What is the best approach vector for orbital capture by an outer solar system body?

I usually see the approach leg before an orbital injection trajectory around a body lying outside Earth's orbit drawn as catching up to it (moving in the same general direction/speed as the body's ...
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3answers
2k views

Why not use deep space hibernation in all missions?

If Deep Space Hibernation of a probe saves energy and power, then why isn't it implemented on long planetary missions and Interstellar missions like, New Horizons, Voyagers, Pioneers, Cassini, etc.......
14
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2answers
1k views

What software can be used to determine deep-space trajectories?

In What are the choices today for orbital mechanics simulation software?, an entire range of software was listed for many platforms. I'd like to narrow this down a bit. Specifically, two questions: ...
34
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3answers
4k views

What is the feasibility of launching a probe to Sedna?

This dwarf planet reaches perihelion in the summer of 2076. At a distance of 76 au, is it feasible to launch a probe that would reach Sedna in time? With an orbital period of over 11,000 years, this ...
10
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2answers
466 views

Interstellar eavesdropping

For about a century, humanity has broadcasted noise to space in the form of TV broadcasts, radio, etc... The nearest star is 4.242 light-years away, so for about 90 years, aliens -- if they exist in ...
21
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2answers
2k views

Are nuclear-powered engines the way to go for space exploration?

I often think about the future of humanity and how to achieve it. Despite criticism, the USA and USSR achieved significant scientific breakthroughs, such as: putting the first man in space landing ...
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1answer
1k views

Would placing an X-ray telescope on the surface of the Moon be a good idea?

Instead of placing an X-ray telescope in orbit or deep space, would building an X-ray telescope on the surface of the Moon an good idea, since it has no atmosphere? If no, please don't forget to ...
6
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1answer
198 views

If there are Earth size bodies drifting in space could we identify them?

I don't think there is any reasonable doubt that comets have been ejected from ours and other solar systems and are drifting in the vast voids of space. If there where larger bodies say the size of ...
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2answers
378 views

Are there enough stray gasses in space to justify streamlining a probe?

Space isn't empty - there are tons of things floating around in it. Seem of these things are pockets/molecule of gas - and a space probe is very likely to encounter some of these at some point in its ...
16
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1answer
361 views

What probe received the most gravitational assists?

Often when launching deep-space probes, scientists will "loop" them around planets, "stealing" some of the planet's momentum and transferring it to the probe - giving the probe a huge speed boost. I'...
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5answers
4k views

What are the advantages and disadvantages of sending a telescope into deep space? [closed]

When I first heard of the Voyager missions I thought this: why not do the same, only make it a telescope? I thought it would surely see a lot of things we can't see from Earth or the inner Solar ...
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3answers
2k views

Why are there no video transmissions from the Moon and Mars?

There is one new project, like Google Maps, which would be an online video transmission of the Earth's surface from a satellite: http://www.urthecast.com/ Another good one is a web cam situated on ...
18
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1answer
550 views

Does Voyager 1 do anything to be more observable?

Currently, Voyager 1 is floating through the emptiness of space. Does it do anything to indicate its presence, like a light source onboard or broadcasting a signal that makes it more observable to ...
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1answer
992 views

Where is the center of space / universe? [closed]

Where is the center of universe? There is cosmic microwave background radiation, and there is its Doppler effect. Is there any map with geographical center of universe? What is situated there? How ...
14
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3answers
2k views

Cubesats in lunar orbit and beyond - how does communication work?

Somewhere I read that there are serious plans to send a cubesat into lunar orbit. A few years ago, the ISS was also offering a launch opportunity for such a mission. I guess that it was actually ...
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2answers
456 views

What are the hurdles we face in deep space exploration? [closed]

I think the Radiation beyond earth will be the greatest challenge for space exploration. what are other factors we face in this area?
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3answers
508 views

VLB interferometry in deep space - does it make sense for communication?

This is something I was thinking about right now when this beta was opened ... perfect! In radio astronomy, there is an technique which is called very long baseline interferometry. The idea is to ...