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How much power does each component of the ISS use?
https://space.stackexchange.com/questions/67162/how-much-power-does-each-component-of-the-iss-use
Published: October 17, 2024 15:05
The ISS gets 100 kilowatts on average cycling between sunlight and shade. That electricity is divided between different components and systems such as the life support system (CO2 management, heat management,..), scientific equipment, waste management,…
How does speed telemetry displayed in SpaceX live videos work?
Published: October 17, 2024 09:50
How is speed value measured and relative to what? For instance when looking at ITF5 boost back burn, one can notice the speed reaches a minimum of 1203km/h before increasing again. Booster is still climbing at this point. This might indicate the considered…
What is the advantage of catching a rocket booster with a tower?
Published: October 17, 2024 01:55
SpaceX recently made headlines for using a tower to catch a rocket booster after a launch. While this is undoubtedly a major technical achievement, can anyone explain in layman's terms why they would want to do this in the first place? They've already…
A question about the improvement points for the simulation（GMAT)
Published: October 16, 2024 15:55
Sorry for my English. I'm not a native speaker.　I am using a software called GMAT from NASA to conduct various simulations, but I failed this time while trying to move a satellite from low Earth orbit to geostationary orbit, so I would like to hear about…
Why, if gravity were higher, would designing a fully reusable rocket be impossible?
Published: October 16, 2024 15:55
I was watching this video: Elon Musk, 13 years ago: A fully and rapidly reusable rocket is barely possible And Elon Musk says, .. a fully and rapidly reusable orbit-class rocket. This is a very difficult thing to do, because we live on a planet where that…
Where can I find orientation of space probes as a function of time?
Published: October 16, 2024 13:27
Ephemerides for many space probes can be obtained from JPL Horizons using their API or their web app. But this only includes data on positions of the probes, velocities etc., but not their orientation in space. Any orientation-related data items like e.g.…
Why SpaceX want to land the rocket on the ground?
https://space.stackexchange.com/questions/50641/why-spacex-want-to-land-the-rocket-on-the-ground
Published: October 16, 2024 11:24
click for full size Won't it be easier and save a lot of money to just catch it or land it in a basket? So rocket coming down can open arm longer than the diameter of the high basket where it goes down through, and gets stoped by the arms resting on the…
How does changing the elevation angle allow starlink to improve line of sight communications
Published: October 16, 2024 10:23
According to this article: https://arstechnica.com/tech-policy/2024/10/spacex-claims-starlink-can-offer-gigabit-speeds-if-fcc-approves-new-plan/ SpaceX seeks to lower its minimum elevation angle from 25 degrees to 20 degrees for satellites operating…
How does changing the elevation angle allow starlink to improve light of sight communications
Published: October 16, 2024 08:48
According to this article: https://arstechnica.com/tech-policy/2024/10/spacex-claims-starlink-can-offer-gigabit-speeds-if-fcc-approves-new-plan/ SpaceX seeks to lower its minimum elevation angle from 25 degrees to 20 degrees for satellites operating…
Is it possible to use the formula of the thrust equation for a helicopter on Venus?
Published: October 16, 2024 07:47
I'm trying to find traction for a landing craft with a rotary system (helicopter) for takeoff and maneuvering from the surface of Venus. I do not take into account the temperature. I use the formula thrust equation from…
What type of radiation does Io experience?
https://space.stackexchange.com/questions/67138/what-type-of-radiation-does-io-experience
Published: October 15, 2024 23:37
I've read that Io (the Galilean moon) experiences unusually strong radiation due to Jupiter's intense magnetic field. This astronomy.com article says that 3600 rem (= 36 Sv), which would be deadly to humans. What type of radiation (e.g. $\alpha$, $\beta$,…
What would the size and rotation of a station need to be to produce 1g gravity from head to toe?
Published: October 15, 2024 22:42
A structure with a radius of 224m rotating at 2 rotations per minute will generate 1g of force on the inside (spincalc). It will generate that force on the feet, but as you travel up the body the amount of force applied reduces. According to Wikipedia…
What is the feasibility of a rocket hobbyist achieving a LEO orbit with a microsat?
Published: October 15, 2024 18:39
Along with being a rocket hobbyist, I'm also an Amateur Radio Operator. I would like to determine the possibility of placing a "microsat" a miniature packet radio satellite, into a low earth orbit.
Why would SpaceX not use parachutes for the final descent of the first stage?
Published: October 15, 2024 11:25
According to what I've read, SpaceX tried to use parachutes to recover the first stage of the Falcon 9, but it did not survive reentry. Now they plan to use 2 separate rocket burns to land: Reentry burn Landing burn I understand the reentry burn in…
Does anyone know what the Starship 5 fins are made of?
Published: October 15, 2024 11:21
I was just wondering what material it’s made of.
Rocketry team application [closed]
https://space.stackexchange.com/questions/67143/rocketry-team-application
Published: October 15, 2024 04:22
I intend to apply to a rocketry team at a prestigious university in my country. They ask for a letter of motivation and my CV. What should I put in my CV to make an outstanding application? Please help
How can I 3D visualize a GPS SEM Almanac, preferably in Python?
Published: October 15, 2024 02:00
I'm able to download GPS SEM Almanacs from Celestrak, but would like to be able to visualize them in 3D with the Earth in the center. How do I go about doing this? Can this be done in Python with Orkit for example?
Any attempt to use Birkeland current (solar wind exciting Earth's magnetic field causing aurora) to put satellites in Heliocentric orbit?
Published: October 14, 2024 22:57
https://en.wikipedia.org/wiki/Birkeland_current states : "Auroral Birkeland currents carry about 100,000 amperes during quiet times and more than 1 million amperes during geomagnetically disturbed times..." It would seem that this energy should be easily…
Do astronauts on the ISS use any sort of local 'currency', even in jest?
Published: October 14, 2024 22:23
In prison, cigarettes might be considered a currency. In grade school, maybe cookies. On the ISS, do astronauts do any sort of bartering for chores for extra goodies or free time? From my understanding, astronauts like spicy foods, so maybe folks who…
Why didn't Pioneer 11 visit Uranus/Neptune, and why didn't Voyager 1 visit Pluto?
Published: October 14, 2024 21:49
The following image from NASA shows the flight paths of Pioneer 10, Pioneer 11, Voyager 1, and Voyager 2, as well as the positions of the outer planets. It seems to me that with a little tweaking of the flight paths, it would have been possible for…
What type of radiation on Io (moon)
https://space.stackexchange.com/questions/67138/what-type-of-radiation-on-io-moon
Published: October 14, 2024 20:59
I've read that Io (Galilean moon) experiences unusually strong radiation due to Jupiter's intense magnetic field. This page says 3600 rem (= 36 Sv), which would be deadly to humans. Question: What type of radiation (e.g. $\alpha$, $\beta$, $\gamma$,…
Why does the SpaceX Falcon 9 rocket do a 180 flip for reentry?
Published: October 14, 2024 20:32
I am very new to the rockets and this can be a very dumb question, just that I am not sure if my understanding here is right? All of the rockets engines are at bottom which help it take off and after stage separation. Why does it have to flip 180…
Optimal timing and direction of burns to reduce peak re-entry stress
Published: October 14, 2024 17:44
Consider a ship in a low circular orbit around the Earth. It wants to land but doesn't have enough fuel for a completely powered descent. However, it also has very limited shielding and would not survive, eg, lowering its perigee deep into the atmosphere…
Could Starship get a probe to Uranus faster than Falcon Heavy?
Published: October 14, 2024 15:09
The 2023–2032 Planetary Science Decadal Survey recommended a mission to Uranus as the highest priority new Flagship mission. Wikipedia describes a mission concept (2021) that would launch in 2031 and take 13.4 years to reach Uranus using a Falcon Heavy…
STM and Shooting Methods
https://space.stackexchange.com/questions/67130/stm-and-shooting-methods
Published: October 14, 2024 04:47
I'm relatively new to the field of orbital trajectory design, so I apologise if the questions herein are obvious. I'm reading Jeffrey Parker and Rodney Anderson's book "Low-Energy Lunar Trajectory Design" Ch2.6.4-2.6.5 and trying to understand how the…
Does SpaceX plan to reuse Booster 12?
https://space.stackexchange.com/questions/67129/does-spacex-plan-to-reuse-booster-12
Published: October 14, 2024 01:34
Today (10/13/24), SpaceX launched Starship for the fifth time and, for the first time, successively landed/caught a Super Heavy booster, Booster 12. I know that the first Falcon 9 Booster recovered, B1019, was never reused and just put on display. Will…
What's a realistic cadence for refueling an HLS Starship on-orbit?
Published: October 13, 2024 23:46
In the wake of the IFT-5 booster catch, I've started to wonder what a realistic timeframe for refueling a lunar starship is. From T-0 of a lunar starship launch to fully fueled for an Artemis mission, how much time will elapse? It seems like there are a…
Why did SpaceX Starship ITF5 float so low in the water after splash landing?
Published: October 13, 2024 21:01
An empty Starship is lower density than an empty Budweiser can. The camera shot of it floating post-splashdown looked like it was floating vertically upside down which is not consistent with empty tanks.
How can I 3d visualize SEM Almanac preferable in Python
Published: October 13, 2024 17:38
I'm able to download GPS SEM Almanacs from Celestrack but would like to be able to visualize them in 3d with the earth in the middle. How do I go about doing this? Can this be done in Python with Orkit for example?
Why did ITF5 float so low in the water after splash landing?
Published: October 13, 2024 16:16
An empty Starship is lower density than an empty Budweiser can. The camera shot of it floating post-splashdown looked like it was floating vertically upside down which is not consistent with empty tanks.
Will a Palm tree on Mars be approximately 2.5 times taller than the same tree on Earth?
Published: October 13, 2024 08:16
I am interested in the growth of plants on different planets. I have read on this site that a 100-pound person will weigh 38 pounds on Mars. Therefore, the ratio of acceleration due to gravity ($g$) on Mars to that on Earth is 0.38. Now, from the…
Would it be legal for a company to build a base on Luna?
Published: October 13, 2024 08:06
Are there any laws governing the legality of construction on Luna? If there are, who's responsible for enforcing them? At least vaguely related: moon structure ownership
Jurisdiction over crime in space
https://space.stackexchange.com/questions/683/jurisdiction-over-crime-in-space
Published: October 13, 2024 08:00
With more and more people going into space in future it is probable that crimes will be committed sooner or later. Who will have jurisdiction on prosecuting such crimes? And who will be able to define what is the crime (let's assume that theft and…
Legality of Outer Space Colonization
https://space.stackexchange.com/questions/37349/legality-of-outer-space-colonization
Published: October 13, 2024 07:49
Is it legal for a private entity to found a space colony? Ex. Build a rotating habitat in orbit around the Earth and let people live there indefinitely
What are the most realistic near-term (like within the next few decades) launch systems for making civilian space travel feasible?
Published: October 13, 2024 07:33
In order to make our space-based science fiction dreams come true, we will have to make getting into orbit as relatively safe and affordable as air travel so that thousands of civilians per year could fly to outer space and thus make the development of…
Is there a plan to build an atmosphere colony (a "cloud city") on Earth?
Published: October 13, 2024 02:20
I understand that Earth's atmosphere ends at 500 km above sea level; then starts the exosphere/space. I further understand that the international space station orbits earth at 400 km above sea level. I was surprised to learn that flying crafts including a…
Has lithium hydride ever been tested as a rocket fuel?
Published: October 12, 2024 14:32
I know about the Rocketdyne Tripropellant rocket that burned H2, Li, and F2 together, but why not use lithium hydride instead? Has anyone tried this, and if so, what was the performance? Setting aside issues of cost and toxic exhaust products, what are the…
How would the Voyagers finally die if allowed to transmit to the bitter end?
Published: October 12, 2024 14:17
According to this answer and this question the Voyagers will run out of power to "operate a single instrument" in 2025 for Voyager 2 and a little longer for Voyager 1. It is purported to be the end of mission. But there is scientific data available even…
Does the Voyager team use a wrapper (Fortran(77?) to Python) to transmit current commands?
Published: October 12, 2024 14:03
I assume that the vast majority of the people who created the software for these missions are now retired (the "space pensioners" of the Voyager mission). Here's a very good summary of the current software team of the Voyager missions Here's another…
Does the tape recorder on Voyager-1 still work?
https://space.stackexchange.com/questions/15290/does-the-tape-recorder-on-voyager-1-still-work
Published: October 12, 2024 13:56
I'm preparing a talk on data storage for an ASME meeting. Given that it's 20 billion km away, I want to quote Voyager I as the "largest control loop" in existence. I'm guessing the tape recording capability is no longer used, but is it still true that…
How are New Horizons images sent back to Earth?
https://space.stackexchange.com/questions/9916/how-are-new-horizons-images-sent-back-to-earth
Published: October 12, 2024 09:27
I'd like to understand how does New Horizons space craft send its data back to Earth, billions miles away from it. I read in a Time article: "Also, at the distance of Pluto, we can only send data back at a rate that’s comparable with an old 1990s modem.…
Any good Books for orbital mechanics and propulsion?
https://space.stackexchange.com/questions/67115/any-good-books-for-orbital-mechanics-and-propulsion
Published: October 12, 2024 06:28
As I look forward to pursuing rocket science in the future, I would like to learn more about orbital mechanics and rocket propulsion. Although I’ve done quite some research on these topics, I’d like to know more through books. Could anyone recommend books…
How about an airbed style habitat for Moon or Mars?
https://space.stackexchange.com/questions/67112/how-about-an-airbed-style-habitat-for-moon-or-mars
Published: October 11, 2024 19:45
An 8 * 50ish * 3 m inflatable "airbed" could fit in a Starship cargo bay, rolled or folded up, plus some extra equipment in the conical bay section. The tensile structures keeping the bottom and top together could be removable sheets or ropes. We could…
What sensations would I feel on a Space Elevator?
https://space.stackexchange.com/questions/9133/what-sensations-would-i-feel-on-a-space-elevator
Published: October 11, 2024 17:51
For simplicity: Standard, 50,000km space elevator from equator to the counterweight. Acceleration, followed by constant velocity, followed by deceleration, and a stop past geostationary orbit. What physical sensations do I experience (e.g. - not specific…
Would a Starlink mini placed inside a plane's cabin be able to get an Internet connection?
Published: October 11, 2024 16:20
I wonder the following: Would a Starlink mini placed inside a plane's cabin be able to get an Internet connection? I am interested in both private and commercial planes.
Which orbital maneuver is currently regarded as the most viable for a human mission to mars?
Published: October 11, 2024 15:20
I realize that there are different orbital maneuvers for different goals (e.g. optimizing time, efficiency, cost, etc.). However, which variables are currently considered as the most important to be optimized? This leads to the question, which orbital…
How to account for the mass of solid propellant lost when measuring the thrust produced in Newtons?
Published: October 11, 2024 14:38
I am doing a physics Science Fair experiment that will examine and investigate the effect of grain-surface area on the peak thrust produced in Newtons. I currently have a test stand with a load cell that measures the thrust produced from a home-made rocket…
Using GMAT data to determine satellite elevation angle
Published: October 11, 2024 12:13
I am trying to simulate a communications system between a ground station in Canberra and a satellite in LEO with a $90^{\circ}$ inclination. Specifically, I am interested in the the elevation angle as seen from the ground station over a 24-hour period. I…
GMAT edit object fields in Mission Sequence
https://space.stackexchange.com/questions/66894/gmat-edit-object-fields-in-mission-sequence
Published: October 11, 2024 11:47
I am trying to change the ISP of an Impulsive Burn during the Mission Sequence. But why so ever, GMAT does not allow me to do so? I looked at the source code as well, and I do not see any indicators (e.g. private of this Field, etc.). Does anyone have a…
What is the optimum lunar latitude for a solar farm and hydrolysis plant?
Published: October 10, 2024 16:11
What is the optimum lunar latitude for a solar farm and hydrolysis plant? If the water hypothesized to be present at the lunar poles is to be hydrolyzed into propellant, large amounts of electrical power will be needed at the location of the hydrolysis…
Inter-constellation Low Earth Orbit (LEO) Satellite collision risks - mitigation is some "relayed AIS" in use?
Published: October 10, 2024 14:00
I saw some news about Starlink satellites often having the do maneuvers to avoid collisions. I don't know what % of the maneuvers were related to collisions between 2 Starlink ones (I guess their share of LEO satellites is pretty big). My question is about…