Questions tagged [interplanetary]

Questions regarding spacecraft designed to travel between planets.

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Why didn't NASA launch communications relay satellites outside the asteroid belt to communicate easily with interstellar satellite?

I came across with nasa's voyager and other interstellar satellite, just thought that if they build a relay satellite which situated outside asteroid belt or nearby to Saturn & Jupiter, to ...
Ashay baghele's user avatar
-1 votes
0 answers
55 views

What delta-v for launching Trojan asteroids or outer Jovian moon ice to crash into the earth's moon (using Jupiter gravity assist)?

Is it feasible to utilize Trojan asteroids or an outer moon of Jupiter as a water resource for Luna (earth's moon)? What would be the approximate delta-v requirements to mine ice from a Trojan ...
deepthoughts408's user avatar
3 votes
2 answers
256 views

How are Interplanetary Transport Network/Weak Stability Boundary paths calculated?

While reading up a bit online, I found out about Weak Stability Boundaries and the Interplanetary transport network. How is this "path" that traverses the Solar System determined? I am aware ...
hi-bye125's user avatar
  • 370
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0 answers
61 views

What conferences have technical sessions that cover credible and transformative alternatives to chemical-rocket-based launch?

Constraints Some examples of such technologies are described on Wikipedia's Non-Rocket Spacelaunch page. But, to clarify a bit further... I found list of such technologies in Figure 2.1 of a document ...
phil1008's user avatar
  • 3,673
2 votes
1 answer
283 views

Why was the ITS concept downscaled?

Note: if you have not heard of the Interplanetary Transport System or ITS, it was a 2016 concept for a fully reusable rocket which could deliver 300 tonnes of paylaod into low earth orbit. It didn't ...
TitaniumVCarbon's user avatar
1 vote
1 answer
126 views

Earth to Enceladus [closed]

Sci-fi writer needs to get from Lunar Orbit to Enceladus Orbit in least amount of time with a travel acceleration of 1.5G no more than 3G for navigation changes. What resources are available that I ...
TARS TARKAS's user avatar
3 votes
1 answer
173 views

How can systems of skyhooks help interplanetary travel

I recently watched a kurzgesagt video on skyhooks, and it mentions that a system of skyhook, one on Mars and one on Earth, can shorten a trip to Mars from 7-9 months to 3-5 months. I am confused on ...
Barry Allen 's user avatar
1 vote
1 answer
184 views

space is a vacuum there is no drag, so would hydrogen harvesting from space to use as fuel be possible once in orbit? [closed]

If space is a vacuum and there is no drag, would hydrogen harvesting from space to use as fuel be possible?
Tara Cunningham's user avatar
2 votes
1 answer
113 views

How to model the gravity of Titan in GMAT

I would like to know how to find the gravity file (.cof) for Saturn's moon Titan. Need this to model the gravity field of Titan.
D P's user avatar
  • 53
1 vote
1 answer
212 views

How long would it take before we use up all the ice in the asteroid belt? [closed]

Lets say that we have an interplanetary society using the ice from asteroids to convert it into rocket fuel, how long would it take before we have used up all the ice on the asteroids. Conditions: We ...
The Rocket fan's user avatar
12 votes
4 answers
4k views

Have any bits of a space mission ever collided with a planet or large moon (not Earth) that was not a target of the mission?

For example, a mission to Mars for which some bit of hardware ended up entering Venus's atmosphere. Has this ever happened, or at least are there projections that it may happen?
Starship - On Strike's user avatar
2 votes
0 answers
215 views

Approach to Interplanetary Transfers in GMAT

I hope to find a straightforward process for designing interplanetary missions using the General Mission Analysis Tool (GMAT). This would involve calculating the required initial state, timing, and ...
FTT's user avatar
  • 149
0 votes
1 answer
65 views

Does the payload capacity of an interplanetary launch rocket increase with decreasing fuel mass or with increasing escape velocity?

Does the payload capacity of an interplanetary launch rocket increase with decreasing fuel mass or with increasing escape velocity? I was thinking that the escape velocity has nothing to do with it ...
FalconHeavy321's user avatar
14 votes
5 answers
5k views

Is 2001: A Space Odyssey's Discovery One still a plausible design for interplanetary travel?

in 1968 Stanley Kubrick and Arthur C. Clarke created 2001: A Space Odyssey. The interplanetary spacecraft, Discovery One, was considered scientifically feasible at the time. The design included in-...
Woody's user avatar
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1 answer
369 views

How long would it take Starship to get to Neptune without any flybys?

After seeing this answer (https://space.stackexchange.com/a/60438/44505) saying that starship could get to Neptune, I wondered how long it would take to get to Neptune. Bonus question: Would it be ...
The Rocket fan's user avatar
5 votes
2 answers
408 views

Would it be practical to fly a probe to Mars using gravitational assistance from Venus?

I decided to fly to Mars in KSP using a slingshot of Venus to see if I could save fuel. Since Venus is closer to Earth, you need less fuel to get there. When I tested it I used less fuel, but the ...
The Rocket fan's user avatar
3 votes
1 answer
142 views

How feasible and cost effective is a superconductive electromagnetic orbital gun for cargo transportation between the orbits of different planets? [closed]

Space is cold enough for superconductivity without active cooling, as well as being a vacuum, thus not requiring an enclosure and pumping out gas for the accelerator. Since an electromagnetic ...
Isaac Dorfman's user avatar
3 votes
0 answers
174 views

Why "quiet cruise" of a spacecraft would cost NASA 30 mln $ a year?

The 2022 Planetary Decadal Survey (Chapter 22) states that "quiet cruise" phase of an interplanetary spacecraft will cost about 30 million dollars a year for NASA. "Quiet cruise" ...
Heopps's user avatar
  • 9,041
2 votes
3 answers
172 views

State vector conversion when changing central body

I have the following state vector of a spacecraft : [X, Y, Z, VX, VY, VZ]. The state vector is expressed in the inertial frame of the central body. I would like to convert this state vector when ...
GuillaumeJ's user avatar
5 votes
2 answers
209 views

Spacecraft localization beyond Earth orbit

How does a spacecraft localize itself after leaving earth orbit? In robotics you can either use known broadcasting information or do real-time position tracking(some type of SLAM) but I suspect that ...
FourierFlux's user avatar
2 votes
0 answers
125 views

What is this figure I have obtained from this MATLAB code around Earth-Moon Lagrange point 2?

This is part of the code I used, where EM: Earth moon ...
Aabha Awere's user avatar
7 votes
2 answers
2k views

Would it be possible to get a modified SprHvy booster to orbit, then send a full stack with Starship on a "standard" config, then mate them in orbit?

The idea is to get a modified Superheavy booster to orbit minus Starship. Then send a Starship to orbit on a standard configuration, and mate the first booster with the recently arrived Starship. So ...
T-Rex's user avatar
  • 71
3 votes
3 answers
990 views

How a continuous thrust orbit transfer can be compared with Hohmann transfer?

Suppose that I have found the solution of an optimal continuous thrust planar orbit transfer from circular orbit A to orbit B by means of a numerical method. It's considered that the mission must be ...
Astrolien's user avatar
  • 569
13 votes
2 answers
2k views

Which 3D space simulation/visualization software (free or commercial) can I use as a post processor of data calculated with Fortran?

I'm designing a space interplanetary mission (Design of low-energy trajectories to Near Earth Objects) by using Fortran. Basically I'm working with the Circular Restricted 3 Body Problem (CR3BP), ...
g_don's user avatar
  • 433
4 votes
1 answer
149 views

Are Interplanetary mission trajectory computations based entirely on Newtonian mechanics?

I am wondering if the application of General Relativity is ever needed(?) I assume that Newtonian mechanics is sufficient with some trajectory corrections applied as needed on route. I also assume ...
gerryD's user avatar
  • 87
23 votes
2 answers
5k views

Elon Musk's ITS Travel Time to Mars Estimate

The average travel time to Mars has been quoted to be around nine months (~ 270 days). This assumes current propulsion methods and when Mars and Earth are near each other. Musk has been quoted to say ...
FontFamily's user avatar
4 votes
0 answers
122 views

How much more does it cost to produce two identically designed probes/rovers/satellites compared to making only one?

There are a number of historical planetary missions that have produced 2 flying instances. Examples include Voyager, Viking, MERS, some of the Mariners missions. Other missions have only one ...
Freddo411's user avatar
  • 374
6 votes
1 answer
174 views

How did Venus Express' periapsis decay so quickly?

ESA's Venus Express ran out of propellant in late 2014 and has probably decayed out of orbit since then. A timeline of events from my research for my answer to Are there currently any spacecraft in ...
BrendanLuke15's user avatar
4 votes
1 answer
223 views

How to calculate an initial impulse for escape from planet's sphere of influence and lay on a specific orbit around the Sun?

I have a spacecraft parked on orbit around the planet. I want to make interplanetary transfer to another planet. I can find the orbit around the Sun that I can use to move from the end of departure ...
Robotex's user avatar
  • 604
3 votes
2 answers
386 views

Spin-stabilization of a NASA rover en route to Mars. What and why?

This NASA's site describes a launch sequence of a rover towards Mars, from which we can read: Before the third stage's rocket is fired to get the spacecraft out of Earth orbit and on its way to Mars, ...
Ng Ph's user avatar
  • 2,724
0 votes
1 answer
79 views

Standing still to move forward [closed]

If our galaxy is tracking through space at ~1.3mm, couldn’t we arrive at point B if we came to a stop at point A. i.e. decelerate to -1 g
Driestcake's user avatar
18 votes
5 answers
5k views

Exactly why does Starship need to be this big for interplanetary travel?

As discussed in several answers to Isn't Starship way too big? Starship's unusual size is due to it being intended for missions to the Red Planet. But why? Even a smaller ship could satisfy the ...
Abdullah is not an Amalekite's user avatar
26 votes
3 answers
6k views

Are there any greater risks of traveling significantly faster to another planet?

Earlier I had thought that space ships can strike against space rocks while traveling to another planet. But I've read that space is vastly empty, it's highly unlikely that something will come in the ...
Rosie's user avatar
  • 369
3 votes
3 answers
214 views

Why allow communication with interplanetary spacecraft to be silent for stretches of time; only getting updates on certain days & times of the week?

Communication between planetary bodies in space, e.g. from the moon, or Mars, takes a long time and has many shortcomings, like line of sight requirements. Communication with interplanetary spacecraft ...
nathandelane's user avatar
11 votes
3 answers
2k views

Is the life support system on ISS and other used manned spacecrafts fully redundant?

I just finished watching the Sci-Fi movie Stowaway where the crew of the spacecraft MTS-42 heading to Mars, gets in all kind of troubles after the failure of the single life support system. My ...
WOW 6EQUJ5's user avatar
  • 2,223
4 votes
4 answers
2k views

Would a spaceplane be able to softly land on an airless planet?

Assuming the spaceplane has no vertical (hover)engines, is there a possibility to land a spaceplane on a celestial body without atmosphere in a horizontal way as if it had one? One could lower the ...
Giovanni's user avatar
  • 389
1 vote
1 answer
121 views

Query on artifical gravity via symmetrical tethered rotation

Has there been any consideration to the use of a tether between to identical space vehicles (e.g. two SpaceX Starships) to induce artifical gravity? I think you would need a diameter that could only ...
Rory Cornish's user avatar
3 votes
1 answer
85 views

Obtaining orbital parameters of a closed orbit given the characteristics of the arrival hyperbolic orbit

According to this paper (page 8) by ESA, given the $v_{inf}$, the right-ascension and the declination of the arrival hyperbolic asymptote, it is possbile to find a loci of pericenters of different ...
Miguel's user avatar
  • 103
4 votes
0 answers
119 views

Why is it that harmful for astronauts and technology to get too far into Jupiter's magnetosphere? Shouldn't it rather be protective?

Jupiter's radiation belts make it impossible for astronauts to stay on Io, Europa and Ganymede over extended periods of time, as well as getting too close to Jupiter at all. I wonder how close would ...
Giovanni's user avatar
  • 633
5 votes
1 answer
280 views

Interplanetary secondary payload

Have there been any interplanetary secondary payloads? If there were none, are any such payloads planned? I consider two options: launcher rocket's destination is Earth's orbit (LEO etc.), then ...
Kozuch's user avatar
  • 1,453
1 vote
0 answers
52 views

Future plans and advances for improved extrasolar planet imaging; has anything changed since 2019?

I have seen What is the state of the art of exosolar planet imaging in 2019? but answers there simply address the types and quality of images. Here I'd like to ask about plans for future technology to ...
Outsider's user avatar
  • 578
3 votes
3 answers
332 views

Asteroid orbiting between Earth and Mars as ferry?

What if we moved a large asteroid to a highly elliptical orbit between Earth and Mars and then occupied it like we occupy the ISS? It'd be a slow trip to Mars, but if we're in no rush, we'd get free ...
user avatar
14 votes
4 answers
4k views

Why is it so hard to build crewed rockets/spacecraft able to reach escape velocity?

Why are we still not going farther than to Low Earth Orbit? Orbital velocity is about 4.8 mi/s (7.7 km/s) and escape velocity is about 7 mi/s (11.2 km/s), about 45% faster. Why is it so hard to reach ...
Greenhorn's user avatar
  • 274
1 vote
0 answers
55 views

Direction of heliocentric entry velocity for fly-by coming from interplanetary Hohmann transfer?

I'm following Curtis's equation on interplanetary transfers. I'm confused by the direction of the entry Heliocentric velocity for a fly-by. If the assumptions is that orbits are: Coplanar, cofocal ...
benr's user avatar
  • 11
0 votes
1 answer
131 views

Could we intentionally contaminate another celestial body with life to start producing oxygen?

My question is simple, could we "nuke" a planet with life to create an atmosphere over time? I was seeing a documentary about Jupiter's moon, Europa, and how it could have hydro thermal ...
pau Fer's user avatar
  • 11
3 votes
2 answers
788 views

One mothership and many droneships concept for interplanetary travel

In sci-fi movies, like Independence Day, we find one big mothership flanked by many small droneships. Take-off and landing giant spaceship is technically difficult and dangerous. The landing surface ...
seccpur's user avatar
  • 1,175
0 votes
1 answer
223 views

Updating of TAI

In spaceflight keeping track of time between systems widely separated in space (e.g. people on Earth vs spacecraft in deep space) and/or time, moving at substantial relative velocities and in ...
user37920's user avatar
4 votes
1 answer
384 views

Range of travel time between particular planets using the Interplanetary Transport Network/Interplanetary Superhighway?

I understand the Interplanetary Transport Network allows for travel at low speeds between different planets in the solar system using very little energy. Is there flexibility in how long it would take ...
Bob516's user avatar
  • 6,917
4 votes
1 answer
360 views

When the magnetic poles of the Sun flip (once in 11 years), is the Earth hit by more galactic cosmic rays?

The Sun protects us from cosmic rays from beyond the solar system. Every 11 years, the Sun's poles reverse. Solar cosmic rays are greatest during the reversal. During the reversal, are we hit by more ...
Deschele Schilder's user avatar
46 votes
6 answers
11k views

Would it be easier to put humans on Venus rather than Mars?

With all the speculation of manned missions to Mars, there is very little talk of a manned mission to Venus (whose orbit is closer to the orbit of Earth than mars is). That being said, would it be ...
jw01's user avatar
  • 479

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