Questions tagged [launch]

Questions regarding the takeoff or the liftoff phase of the flight of a rocket and the set of activities required for preparation of the launch vehicle leading to it.

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66 views

South Korean as a spacefaring nation

Spacefaring nations are those capable of independently building and launching craft into space, what are the key steps taken by South Korea to join the group of spacefaring nations?
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Why making such a big deal with Max Q?

At each SpaceX launch, they always make some big deal of Max Q which most of the time comes at around 13Km and at a speed of 1700Km.h-1 But on the way back, stage 1 is at this same altitude of 13km at ...
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Who is going to the Moon in 2022? How many planned missions to land something there?

How many planned missions are there that plan to land something on the Moon in 2022? Secured access to launch necessary to count, no washing-machine with bottle-rocket missions. Please include a link ...
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Why is Ariane-5's upper stage appear to vent exhaust post engine cut off?

I was surprised to see, with unaided eyes, a rocket like object in the skies on Dec 25, 2021 (Indian time) around the same time as JWST launch. My coordinates were approximately ...
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Other launches at December 25th than JWST?

The JWST was launched at an unusual date, the 25th of December. Are there other historic launches during the last 10 days of December? Some examples: ...
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What is the benefit of an inverted rocket stage?

For example the Chinese rocket Jielong 1 has an inverted 4th (final) stage. So the payload sits between 3rd and 4th stage. When 3rd stage separates it has to do a 180 degree turn before igniting the ...
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Why is JWST Launching from French Guiana?

Is the launch from the ESA spaceport because of agreement or an orbital insertion advantage from that facility?
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204 views

What is the smallest object our current technology is capable of launching into space?

Well, I'm quite ignorant about space exploration in general, but I hope I don't make too many misconceptions. So, from what I could find on the internet, there is a certain type of spacecraft ...
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Are there any projects of flying launch pads on high altitude ballons? [duplicate]

It is possible to fly up to 30 km with high altitude balloons. Is it possible to build an island there with launch pad on it? Will it help to fly to space?
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What are the factors that determine the roll rate of a launch vehicle during the atmospheric phase?

Even though there are plenty of literature regarding the pitch control of launch vehicle, I couldn't find any regarding the roll autopilot. Is there any formula on how aerodynamic forces affect the ...
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Is RCS a good option to control roll during the atmospheric phase of the launch vehicle?

Do rcs perform well in the presence of high aerodynamic forces?
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What is this black smoke coming from an all solid fueled Epsilon rocket?

I saw a clip of a recent (Nov. 5th, 2021) JAXA Epsilon launch on Instagram (link). Shown differently here in a YouTube video @~0:23s: It's an entirely solid fueled ...
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Why aren’t vacuum engines turned on after Mach 1?

In rockets, smaller nozzles are used at lower altitudes because atmospheric pressure would cause problems by pushing air into nozzles with higher expansion ratios. However, it seems to me that once ...
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What is "anti-geysering" and why would you turn it off 70 seconds before launch?

Today Rocket Lab launched the Electron from Launch Complex 1 Pad A in New Zealand, and there was something about ...the first time a helicopter will be stationed in the recovery zone offshore to ...
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Is an orbital insertion burn part of any launch from earth

As I understand it once a spacecraft reaches low earth orbit it may have to do another burn to reach a different orbit. Would that change in orbit be considered an orbital insertion burn? Do any ...
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What is that yellow fixture that the launch vehicle is resting on?

What is that fixture called as? I think it is used to support the launch vehicle during integration. Please correct if wrong. source - https://www.ruaviation.com/news/2019/3/12/13107/?h here's ...
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Was the JWST's shipment from California to French Guiana kept secret or otherwise anonymized during transport?

It's not often that a sea ship is spotted with cargo worth one hundred ten billion dollars. I vaguely recall reading an article several months ago where someone from NASA mentioned that they would not ...
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Just how much of a spaceflight first will the fourth 2nd stage burn of the Landsat 9 launch be?

USGS.gov's Landsat 9: Payloads stacked atop Atlas V for launch includes the following: A fourth and final burn by the Centaur's RL10C-1 cryogenic main engine executes a deorbit maneuver nearly three ...
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How close to the launch site at Kennedy Space Center does a press badge allow?

How much closer than Bananna Creek Viewing Area can a press badge get me to the launch site at Kennedy space center? Or any other way to get closer?
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Was an onboard camera during a rocket launch ever pointing to the side rather than down?

I think all onboard cameras I ever watched were pointing down, towards the engine, during the ascent of the rocket. Do you know of any rocket that had a camera pointing to the side (towards the ...
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Why are the four launch opportunities within each Inspiration4 launch window "about an hour apart"?

In the SpaceX Inspiration4 Launch broadcast at about T-01:31:05 (91 minutes before launch) the process for selection of launch windows for the mission is roughly ...
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How old is the use of "L minus" to denote the number of days before launch?

In the SpaceX Inspiration4 Launch broadcast at about T-01:31:05 (91 minutes before launch) the term "L minus five" is used. While "T-minus" is a ...
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Would it be possible for a Falcon 9 booster stage to land after an in-flight launch failure?

We all know that the Falcon 9 is designed for reusability, but there still have been some hull losses. Though this hasn't happened yet, say a Falcon 9 experiences an in-flight failure where four core ...
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When did the Astra Space test flight 006 actually reach max-Q? There is substantial disagreement in the audio feed of the launch (Launch Vehicle 0006)

Watching the NASA Spaceflight video Astra Test Flight (Launch Vehicle 0006) linked below it seems the launch was terminated, but at least on the video there was no audible Earth-shattering kaboom. ...
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Roughly how high does a rocket have to get before the self-destruct becomes inaudible? Invisible?

Watching the NASA Spaceflight video Astra Test Flight (Launch Vehicle 0006) linked below it seems the launch was terminated, but at least on the video there was no audible Earth-shattering kaboom. ...
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Trussed strongback or hollow shell strongback?

I noticed that rocket Lab has a hollow rectangular section strongback made of steel, while few strongbacks like that of Astra [similar size] has a trussed structure for a strongback. is there any ...
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Why do recent launch vehicles like that of Space X and Rocket Lab have far fewer umbilicals than before? What has changed?

Launch vehicles using mobile launch pads have many umbilical connections, whereas the ones using TEL launch structure with strongback, don't. Why is that? As seen in the picture, Electron has just one ...
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Are cherry-pickers a new thing in spaceflight?

NASA Spaceflight's Chang Zheng-4B launches with two Tianhui 2 satellites links to the following @Cosmic_Penguin tweet It turns out to be...something else, an LM-4B successfully launching the 2nd pair ...
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Largest number of rockets launched into space from a given launch site in a 24 hour period?

Question: What is the largest number of rockets launched into space from a given launch site in a 24 hour period? Where, when, why? "into space" means $\ge$ 100 km, but pretty close to 100 ...
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What happened to the launch debris that the US dropped on Cuba? Was it noticed or reported?

This answer to How does one dogleg from Florida to a sun-synchronous orbit? this answer to History of multiple-payload launches? both describe a launch of GRAB1 that secretly contained a second ...
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Most dog-legged launch?

There are enough questions about dogleg maneuvers that there is now a dogleg tag, but the definitive dogleg answer is @JakeBlockers (linked below) which includes images of a dogleg from Florida that ...
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Penalty for Neutron dog-legging from Wallops to synchronous?

From the April 15, 2021 Everyday Astronaut video A chat with Rocket Lab's CEO Peter Beck about Neutron, Electron recovery and Rocket Lab's future! linked below (mostly from closed captions, small ...
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How do vibrational isolators reduce the g-forces of a payload on a launch vehicle?

Launch vehicles often use vibrational isolators to reduce g-forces to protect delicate payloads. How are g-forces reduced on the payload while both the payload and the launch vehicle maintain the same ...
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If money weren't an issue, what's the best way to get maximum mass to LEO in 1 year? 5 years? 10? [closed]

I can kick this over to World Building if it's more appropriate, but I was hoping to get an actual technical examination of this. So here's the question: if money were not an issue and for some reason ...
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Does MAX Q during rocket launch only say that rocket experiences max dynamic pressure? [duplicate]

I know that during rocket launch, one main event that occurs is MAX Q where the rocket experiences maximum dynamic pressure which is simply (1/2)ρv^2. I also know that drag coefficient of rocket ...
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Could a Falcon 9 reach orbit with a person glued to the outside of it?

Apologies for asking a dumb question, but I'm going to ask it anyway... I was watching a music video where the singer duct-tapes her ex to the side of a rocket to exile him into space, and it made me ...
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Is or was STARGATE really being used for SpaceX launches at Boca Chica or otherwise?

The 2015 answer to For SpaceX's Texas launch site, what kind of range radar/tracking will they have? links to The Spacecraft Tracking and Astronomical Research into Giga-hertz Astrophysical Transient ...
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Does Virgin Galactic experience real weightlessness?

Does Virgin Galatic go into space high enough to experience real weightlessness? A CNBC article states it's more microgravity centrifugal: The spacecraft essentially does a slow back flip at the edge ...
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Just how "unreasonably gigantic" was the exclusion zone for the scrubbed SpaceX's Transporter-2 Mission first attempt?

Watching Transporter-2 Mission, currently after 15:02 in the video (after an extended hold at T-00:00:11) I heard a voice say: ...
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Do space transportation firms such as SpaceX receive a financial compensation if a launch is cancelled because of an airplane entering the launch zone

I read on https://arstechnica.com/science/2021/06/spacex-to-launch-second-rideshare-pressuring-small-launch-industry/ (mirror 1, mirror 2): The countdown clock got to T-11 seconds on Tuesday ...
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Was there any launch vehicle possible that could have been used for a heavier New Horizons with enough fuel to enter Pluto orbit? (adding ~10 years)

Answers to the Astronomy SE question Can New Horizons probe turn back and start orbiting Pluto are of course no, it would have to have been a different mission with a lot more fuel and a bigger launch ...
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Which Launching State HASN'T breached its obligations under the 1976 Registration Convention?

(the wording of my question above is voluntarily provocative, but the actual question below may be even more) The context: The 1976 Registration Convention is part of a set of Treaties that ...
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Does Article VI of the Outer Space Treaty apply to a Launching State?

The following question was asked and answered 3 years ago: might ISRO’s launch of Swarm’s satellites in 2018 be at least a technical violation of the Outer Space Treaty? Recall that the launch in ...
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Measurement and estimation of temperature of Space Shuttle nose cone during launch and re-entry

During the launch and re-entry of the Space Shuttle, what are the measured and estimated temperatures (or distribution) of the shuttle nose cone as a function of altitude? How is the temperature ...
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What are the advantages of building a rocket base on the moon (if there are any)? [duplicate]

Gravity is 1/6 on the moon (as compared to Earth). So to launch a rocket there will take considerably less fuel. On top of that, the moon circles around the Earth so you could give the rocket all ...
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If Country A's rocket hits an incorrectly declared satellite of Country B, which institution can arbitrate the dispute? Under which international law?

The related recent question Which institution regulates rocket launches of all countries? was closed as it is considered as already answered 7 years ago. I would like to submit the following scenario ...
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Which institution regulates rocket launches of all countries? [duplicate]

Which institution regulates the rocket launches of all countries? Meaning, suppose a country wants to launch a rocket, where do they have to report it before the actual launch and how far ahead? ...
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139 views

What is an "Aceteria improved Ryan suborbital sounding rocket"?

Why does the Minotaur I wear a yellow jacket that "banana-peels" off as it launches? links to the NASA Wallops video NRO L-111 Launch (already cued at the statement in question). At the end ...
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Why did the space shuttle's altitude go down after reaching 108,000m?

I recently took a look at this little data sheet by NASA: Math and Science @ Work; Space Shuttle Ascent Time Altitude Velocity Acceleration Comment (s) (m) (m/s) (m/s^2) 20 1244 139 18.62 40 5377 ...
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Why does the Minotaur I wear a yellow jacket that "banana-peels" off as it launches?

Videos available of the recent Minotaur I launch at Wallops for NROL-111 show a yellow jacket on most of the four stage SRB-to-orbit launch vehicle. I read or heard somewhere that wires attached to ...

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