Questions tagged [spacecraft]

Questions regarding the craft that house humans or equipment during space exploration.

Filter by
Sorted by
Tagged with
2
votes
0answers
49 views

Attitude and orbit thrusters catalog

Typically, when trying to adjust simulation parameters (of orbit control, attitude control...) to real world values in order to validate algorithms with comparisons with past and current mission ...
2
votes
2answers
418 views

Could a satellite levitate above the magenetic fields of Earth?

Like the toy the base of the levitation could the Earth be the base and the space station the levitron? https://earthscience.stackexchange.com/questions/13854/where-on-earth-is-the-magnetic-field-...
5
votes
0answers
156 views

Small-bodies landing strategies

Looking at past landing missions on small bodies such as Eros, Itokawa and 67P I found different landing strategies Eros: NEAR Shoemaker probe performed 4 impulsive pre-planned open-loop maneuvers to ...
2
votes
1answer
218 views

Would a rotating wheel spacecraft “flip”?

I am looking over some proposed rotating spacecraft such as the Nautilus-X and the Ares from the movie The Martian as well as much more fictional ones such as from the Jovian Chronicles and even Halo. ...
4
votes
4answers
752 views

Missions at or soon-to-be at Mars and their DSN “codenames”?

I'm "mining" old DSN data and would like to see all communications with spacecraft around Mars. A quick snapshot in their data shows the following codes. I can guess that ...
3
votes
2answers
246 views

Insight mission broken-plane maneuver needed?

Will the Insight cruise stage do a broken-plane maneuver at TCM-2 (or 3), or does the Centaur upper stage have plenty of performance (as I suspect) to directly insert this small s/c into the necessary ...
6
votes
1answer
378 views

How spacecrafts are built e.g. Dragon, Orion, etc?

What materials are using to build nowadays spacecraft? What kind of joints of main structure is used - is it a welding, riveting or something else? Where can I find such informations? Any books, ...
10
votes
3answers
3k views

Are spacecraft single-use?

Are today's spacecraft and carrier rockets really for one use only (launch and landing)? And then they can't be used anymore?
7
votes
1answer
518 views

What are the benefits of using pyrotechnics on spacecraft?

NASA always appears to use pyrotechnic devices (NASA standard initiators for explosive bolts, frangible nuts, etc.) to release elements (spent stages, fairings, etc.) where SpaceX appears to be using ...
2
votes
1answer
2k views

How does the Thrust-to-weight ratio of a rocket affect its efficiency and performance in atmosphere and vacuum?

Is there an optimal thrust to weight ratio or does it not matter at all?
11
votes
1answer
1k views

Which crewed spacecraft provides the gentlest decent and/or landing?

Landing with a Soyuz capsule is often compared to being in a car accident1, it's pretty violent on touch-down. On the other hand, I imagine the Space Shuttle's touch-down to be a little like a rough ...
8
votes
1answer
452 views

Why aren't there many audio soundscapes recorded within the spacecraft?

First of all, let me explain that I am totally blind, and audio is my primary source of information. Through soundscapes, I can hear how big or small a room is, and make pictorial and spatial images ...
0
votes
1answer
59 views

Change a Spacecraft's attitude from 3 - axis stabilised to spin stabilised?

I am essentially trying to "spin up" a s/c, so it spins about 1 axis at a known spin - rate. I then need to figure out how much time it will take to do that, and how much force required (which I ...
8
votes
2answers
316 views

Would Elon Musk's roadster be able to rotate itself using its wheels as reaction control?

If so, couldn't it also rotate itself sideways somewhat by turning its front wheels? (assuming it has 4wd and electricity.)
6
votes
1answer
217 views

What is the basic mechanics behind the way the orbits of the twelve Vela spacecraft evolved over decades?

After reading the question Where is Vela 1A? Is there any information what its orbit would be like now? and the answer there, it looks like they were deployed in roughly 5 day, 100,000 km circular ...
1
vote
0answers
60 views

Standards of “clean” for artifacts launched into space

When the Viking landers, and the Sojourner, Spirit, Opportunity, and Curiosity rovers were built and prepared for launch, they would have had to be made as free of Earth microbes (living or not) as ...
0
votes
0answers
84 views

Would a Mars flyby be possible on a transfer orbit from Saturn's moon of Titan to Earth?

So, I am trying to calculate whether a transfer burn from Saturn's moon of Titan to Earth would involve a Mars flyby, assuming I have the burn start on 2 March, 2025 and arrival on 19 March, 2031. ...
5
votes
2answers
336 views

How much will Europa Clipper weigh?

I realize that NASA will have to change Europa Clipper's loadout based on whether they are launching on the SLS 1b or the Atlas 5 backup, but does anyone know what those two mission masses will be, ...
7
votes
1answer
7k views

In what position is the Tesla Roadster mounted on the SpaceX Falcon Heavy?

I've been looking at the live streams but it's difficult to tell. How is the Tesla mounted on the Falcon Heavy? Is parallel or perpendicular to the axis of the rocket?
5
votes
3answers
2k views

Why can't permanent magnets be used for radiation shielding in space?

I've been reading a lot about concepts for protecting astronauts from Galactic Cosmic Radiation on interplanetary voyages. I've read about a lot of different ideas, but all of the ones involving a ...
16
votes
3answers
3k views

Can we destroy an asteroid by spinning it?

In a YouTube video Colonizing the Solar System, part 2: the Outer Solar System, Isaac Arthur who is a YouTuber and also a physicist says something like "you don't spin an asteroid for artificial ...
30
votes
4answers
5k views

When will we send floating probes to Venus?

Recent plans on human missions to Mars have sparked many discussions, one of which is about if we should colonize Venusian upper atmosphere with Zeppelin like floating ships and cities first. NASA ...
18
votes
4answers
3k views

Can we set up an orbiting transporter between Earth and the Moon?

I will give an example with the moon. If some spacecraft is put either in orbit around both earth and moon or in highly eccentric orbit that intersects with the moon orbit, some other spacecraft can ...
1
vote
0answers
197 views

What is the best propulsion for an interstellar ship? [closed]

What is the best propulsion for an interstellar ship? with the current technology If we sent a spacecraft in this decade or the next, what would be the best propulsion for that ship? I speak of a ship ...
1
vote
1answer
596 views

Chamber pressure for Merlin vs Raptor

So, I've been doing some digging, and I found that the chamber pressure for the raptor engine is more than 4 times that of Merlin (~4,000 psi to ~980 psi). How would SpaceX manage to pressurize the ...
63
votes
6answers
25k views

Can I drive Elon Musk's Tesla after it's been in space for 100 Years?

We know that the the payload of the maiden Falcon Heavy flight will be... Elon Musks's Tesla Which will be placed in "Mars Orbit" Assuming it is serviced and road ready when launched with the keys in ...
1
vote
1answer
148 views

Could BNNTs be used for Whipple Shield designs?

BNNTs are a upcoming and promising nano-tube for space exploration. Featuring a young's modulus similar to diamond [1] and offering extensive radiation protection [2], Could BNNTs be utilized in a ...
20
votes
3answers
3k views

Cost-effective Space Shuttle: was it feasible?

As far as I understand, NASA's Space Shuttle was initially conceived as a cheap way of launching people and cargo into orbit, with one-week vehicle turnaround time and dozens of missions per year. ...
13
votes
2answers
6k views

Apollo 17; what is a barber pole, and what did “it is gray” mean?

Following the links in this comment by @Uwe I've found some interesting sources of information on Ham (amateur) radio operators trying to listen in on Apollo transmissions. At the bottom of Sven ...
6
votes
2answers
287 views

Does stress-testing a spacecraft affect its durability?

When a spacecraft is built and prepared for a future launch, its parts and the whole spacecraft usually goes through a lot of testing - for example, the James Webb telescope has already been through ...
4
votes
1answer
2k views

Why has ESA never flown a crewed spacecraft?

According to Wikipedia, ESA has never had a crewed spacecraft. While this is reasonable, it's striking that no ESA crewed spacecraft is in development right now. What's the rationale behind this ...
1
vote
1answer
89 views

How far did the Mars Polar Lander travel?

How far did the Mars Polar Lander travel in its journey to the red planet? I couldn't find the answer on Wikipedia or on the official NASA site. I'd prefer some answer based on a good source, or ...
6
votes
1answer
543 views

Why use skids for landing gear on an orbiter?

Why does the Dream Chaser use a skid as the nose landing gear? Wouldn't this increase the risk of accidents or damage to the runway when landing on a paved runway?
16
votes
1answer
811 views

How important is plume impingement in rendezvous operations?

When performing space rendezvous operations close to the target vehicle (0-5 m relative distance), pursuer thruster escape nozzle gases can hit the target if firings are done in the direction of ...
2
votes
1answer
863 views

How are the velocity and range of a spacecraft measured from ground based stations?

How are the velocity and range of a spacecraft measured from ground based stations? For example we can go on NASA's website and look at the real time data for the mission status of their past ...
-2
votes
1answer
393 views

What is the “true” cost to send a freighter (spaceX or SoyuZ) to the ISS? [duplicate]

What is the real cost (all costs) in to send a freight craft to ISS? Which launch system is the most cost effective?
2
votes
1answer
106 views

Have any deep-space spacecraft supported same-band turnaround of Earth-based doppler measurements?

Table 1 of this document gives Spacecraft Transponder Turnaround Ratios that are supported by the Deep Space Network. These are the PLL controlled divide-by ratios that a spacecraft uses when ...
6
votes
2answers
806 views

Physical meaning of perigee advance

I'm starting to study orbital perturbations and I can't find any physical explanation about the perigee advance (apsidal precession) when considering Earth oblateness effects. Can someone give a ...
3
votes
2answers
485 views

Space Ship capable of travelling from Earth to Moon and back

What would be required to have a vehicle like the space shuttle in that it could launch from earth and travel through space and was reusable except that it also possessed the capability to land on the ...
4
votes
2answers
467 views

Has the Moon's shadow on the Earth (solar eclipse umbra) ever been photographed from beyond Earth orbit?

Here is a great answer with photos of the shadow of the moon on the Earth's surface (umbra) during a total solar eclipse, taken by real people in space, and links to even more of them. I think there's ...
9
votes
2answers
2k views

Are there any CubeSats that have been launched into Geostationary (GEO/GSO) or Geostationary Transfer Orbit (GTO)?

There is one mission by GSFC/NASA - Shields-1 to be launched into GTO. Apart from that I couldn't find any other mission to GTO/GEO. It would be of great help if there is any information on this.
6
votes
3answers
5k views

Why is Voyager 1 faster than all other space probes?

From the Wikipedia article, List of artificial objects leaving the Solar System: Although other probes were launched first, Voyager 1 was able to achieve a higher speed and has overtaken all others. ...
62
votes
4answers
15k views

How did people know how to build the first space ship?

How did the early designers of spacecrafts have any idea what space was actually like? How was a vessel ever constructed that actually flew through Earth's atmosphere without burning up, and then ...
1
vote
0answers
442 views

Can I become an astronaut by having bachelor's degree in computer science and engineering? [duplicate]

I have bachelor's degree in computer science and engineering. And thinking about learning masters degree in aerospace engineering. Will that help me in becoming an astronaut?
0
votes
3answers
1k views

Why does a spacecraft's attitude become stable when it rotates?

What is the logic behind spacecraft spinning to increase stability? How does angular momentum play a role in this?
0
votes
1answer
216 views

How could you safely break onto a space shuttle? [closed]

Writing a near-future SF novel here. One character has to rescue another character from an enemy space shuttle (in orbit). Most hull breach scenarios sound really dangerous-- is there a method that ...
4
votes
1answer
11k views

Difference between true anomaly and mean anomaly

What is the difference between true anomaly and mean anomaly in orbital mechanics? I want to understand the physical meaning of mean anomaly, for example true anomaly is the angular position of a ...
4
votes
2answers
9k views

What is the maximum speed an ion engine can propel a spacecraft at?

I read that with our current ion propulsion technology it is possible we could send a craft moving the maximum of 100km per second, or around 62 miles. However we seem to be limited by how strong of a ...
12
votes
3answers
741 views

Apollo era remote control of vehicle

I am wondering what kind of ability NASA had during the Gemini or Apollo program era to control the vehicle from the ground. From reading some capcom transcripts and looking through some random ...
22
votes
1answer
2k views

Why did Apollo spacecraft use both AC and DC equipment? Still used in present and future designs?

Why did the Apollo spacecraft use both DC and AC power, requiring heavy inverters? Was it impractical to design everything to run on DC power only? Why? Are both AC and DC power still used in present ...

1
3 4
5
6 7
10