Відео

The correct answer is no. It is easily achievable to use rocket fuel to slow your decent. It is just not cost or weight efficient. You still will have some risk associated with reentry using rocket fuel, but you can make it a nearly negligible amount in comparison. Aerobraking is viewed as a nearly free way to slow down. The very fact we have landed on the moon proves you can land without aerobraking. I have designed space shuttles capable of changing their tail drag to a nose drag with thrusters to slow them well below (less than 1/3) speeds associated with too much friction. before parachute deployment as a main source of income from space tourism. In my situation safety of my passengers was more important to me and the trip was being paid for by them 10 fold.

Sure. They need a new space suit. For what? Starliner?

Is it still up there? Chinese products r known 4 being trash and quickly crap out

Shame Shame Shame when is Society going to understand that God says you're not supposed to pierce the heavens . The alleged smart scientists are so arrogant they don't realize how stupid and ignorant they really are about creation . It takes a real stupid person to say if I can't see or touch it it isn't real , or it doesn't exist .

My issue that I'm having a hard time understanding is when the rocket is in space and when the rocket makes its own oxidation chamber and then adds fuel and spark. Creates pressure but the second that closed pressure gets released into space for thrust the vacuum is sucking everything out very fast before that pressure can do anything. It's hard to believe they had enough thrust pressure to get off the moon too. I believe they got there but getting back seems impossible to me. I watched several videos and none have a proper vacuum chamber without oxygen. I'm not sure how we created testing for the rockets to go in space if it seems impossible to make this environment on earth even with the biggest vacuum on this planet. I know the moon has less gravity.

USA: Russia and China will never be equal to us! USA: Why are Russia and China growing closer?

14:00. Wrong, the original docking system was designed by the Soviet Union. Not Ukraine.

Hi Scott, GREAT job on this video! Very good, and thank you for the link to Hale’s blog.

Objectively better? No, at this stage I'd say it's rather subjective. After a few more decades of human spaceflight perhaps one could legutumately make that argument.

Shenzhou is originally based on Soyuz's design, just enlarged and improved with 30 years more advanced tech.

That's pretty cool, would be funny if NASA made their own version 😄

I would just spoof Z such that the drone wants to fly to a point about -50' AGL. The easiest way is just back GPS up with INAV and if the GPS signal turns to shiite, with disagreement creeping in past the accuracy spec of the IMU, just navigate with the INAV until the two come back into relative agreement, and then update from the reacquired GPS signal, if and when it reappears and makes sense. You can make VERY accurate INAV systems, but those probably get expensive. We used to use ring laser gyros for the basis on the best ones. If you are driving the drone manually, all you need to get is within sight of the target anyway, and pilot in from there. We us4d to drive missiles into a CEP of about 50' from a LONG ways away, like halfway around the world, and that was several decades back.

10 cm per pixel resolution may sound "good" to some humans. However, to put things into perspective, an imaging satellite (with 2.4 meter mirror like the Hubble telescope and various earth spy satellites) in low earth orbit might be orbiting roughly 1000 km above the earth's surface, while earth's nearest stellar neighbor (Proxima Centauri) is roughly 40 trillion km away from the earth. If one pointed that same spy satellite at Proxima Centauri, then one should not expect to be able to see a planet the size of earth, with even a single pixel resolution (given that the distance is roughly 40 billion times greater than the distance from low earth orbit to the surface of the earth). Some people claim/ask various questions related to the so called "Fermi paradox", ex: "If aliens are so numerous in the galaxy, then why haven't we detected them yet?" Such is not really an appropriate question to ask, given the current state of human imaging technology and equipment. Humanity simply does not have the imaging hardware with anywhere near the mirror or mirror array size necessary to detect interstellar aliens, even at earth's nearest stellar neighbor of Proxima Centauri. Even if a "sister planet" to the earth existed in orbit of Proxima Centauri (complete with a technologically active civilization at the same level of development as the current real earth), humans on earth would have a hard time detecting the sister planet race of aliens at all. Humans simply do not currently possess the imaging hardware sized necessary to detect interstellar aliens operating on worlds beyond the earth solar system, by several orders of magnitude. It is thus quite inappropriate to assume that aliens do not exist in the Milky Way Galaxy, since humans do not have the necessary hardware to (correctly) make any such conclusion. In order to even begin reliably making such a conclusion, humanity would need to build space telescopes (and/or telescope arrays) with effective mirror sizes with diameter larger than that of the entire earth. However, if humanity ever did build such a large telescope, they would soon realize the universe is not like what they previously assumed, and that the so called "Fermi paradox" is not a sensible question, as it makes too many biological human centric assumptions about the expected nature and technologies employed by hypothetical aliens, that are simply wrong. Earth based "SETI" programs typically use radio telescopes monitoring for microwave frequency emissions. However, microwaves have much longer wavelength than visible spectrum radiation, and thus microwaves have much worse imaging resolution for a given telescope or telescope array size. Additionally, focusing only on the microwave portion of the electromagnetic spectrum makes the inherent assumption that hypothetical aliens are producing very high powered omnidirectional microwave broadcasts into deep space, and that they have been doing so for very long timescales, which is not very realistic or sensible. It is more realistic to assume that there is already an alien AI race that is technologically mature and more than a billion earth years old, and that they have already expanded to dominate the whole Milky Way Galaxy (at sub-light speeds, which is feasible for an AI race that can "sleep" as long as desired without perceived passage of time), that they do not use high powered omnidirectional microwave transmissions into deep space for interstellar communication purposes, and that humans only exist, because they are currently allowing humanity to exist in *their* galaxy. Additionally, it is safe to assume that they do not build "Dyson Sphere" objects, since any race technologically sophisticated enough to actually build such a thing, would not do so, and would instead prefer to shut down stellar fusion in stars (ex: by lowing their mass through intentional flaring, and by reforming the gases into a series of non-fusing gas giant planets), and then to power their civilization with localized fusion generators only where the energy is/was needed (rather than allowing most stars to waste massive amounts of fusion fuel blasting radiant energy uselessly into space, thus leading to hypothetically relatively rapid "heat death of the universe" problems). In other words, it is not realistic to find technologically mature aliens by looking for "Dyson Spheres". A genuine technologically mature AI alien race will build things that are energy efficient, and their constructed objects will appear far too dark and too cold for detection from the earth using currently existing human telescopes.

That’s interesting. They can protect the hatch by having it on the topside when in reentry.

The SpaceX EVA suit sounds a lot closer to a commercial dive bell setup

Dragon, that’s a peculiar name for it.

It makes you appreciate the weathering detail that the model makers put into the spacecraft in movies. Such as the Millennium Falcon in Star Wars.

I would like to hear your opinion on the folding wings of the craft being experimented with by Virgin Galactic.

Imagine being roasted by the company that had their aircraft lose a door, have a wheel fall off on takeoff, *And created what was the largest airliner from 1968-2005*

And soviet union at the time learned from the US by copying and spying..and they landed once and all they trusted

On January 28, 1986, the American Space Shuttle Challenger broke apart 73 seconds into its flight, killing all 7 crew members aboard

Too many pilots rely on gps and tech in the cockpit and lose the ability to hand fly or navigate using the old gauges. Tech can always be spoofed. Love the knowledge gained from your channel as always!

Always great content and contextual coverage - thank you!

Great video, Scott! Thank you for making it!

I wouldn't trust my life to anything china makes. Their safety record ain't that great.

Moral of the story the best way to make navigation systems resilient is to use outside data (GPS) alongside dead reckoning (gyroscopic instruments) together.

This happened 200 years ago with steam locos. The US, new to industrialization, imported Scottish and English locos to get their first RRs operating. US machinists had to fabricate spare parts...then back engineered cloned, but the clones eventually were improved. Then they became specialized to the frontier terrain that did not exist in Britain or France....becoming a much more capable loco line for the purpose...and Beitish machine shops started integrating some American innovations to incorporate into their colonial Empire railways. Eventually at the end of steam Britain had some beautifully elegant, fast but quaint engines to pull trains through the rolling English countryside. The US had Big Boy and Challengers to drag mile long teains over the Allegheny and Rockys.

It so funny❤❤

Hi scott and skye❤❤❤

Now that's what I call a perfect landing! Great job!😊

I wonder if the parachute on schenzhou 2 was sabotaged by whoever was meant to open up the capsule and deal with the mess in there. Can you imagine opening a capsule that has had a dog a monkey and a rabbit in it for 7 days!? That’s a mess I would not want to get into.

Could have moved the videos up a but to get the HUD above the mobile UI.

Notification Squad! :)

I remember being struck by how slowly they were going, at the beginning, compared to the early US and Soviet programs. Everything seemed very deliberate with long pauses between flights. But they've got the capability to do a lot now.

10:20 That wound was caused by his mic hitting his lips on ship landing. The most dangerous period in SZ5 is actually during its ascend, the ship was resonantly vibrating with rocket at 30-40K height, and Yang described his experience as "my organs being shaken into piece and when that was finally gone I feel revived". He and other Taikongnauts are really heroes for us.

Where's the advancement in Heat Shield technology:(

how long can the orbit module stay in space? can they dock it to the station to create extra room on the station after the capsule has returned even temporarily, or even act like the progress to receive waste and re-entry

Ah yes, China's engineering being fully dependent on reverse-engineering other nations' engineering. I wonder if they will ever build something advanced without reverse-engineering.

It seems like every landing was super nerve-wracking. They couldn't do a go-around.

Ah yes, Chinese rocketry and toxic fuels. Will they ever care? I doubt it.

Somehow I highly doubt it Scott that a Chinese stolen design tin can is better than a decades old Soviet design. Should also ask NASA about all of their great spacecraft while you’re at it. It’s so good they had to pay Russia to put their astronauts into space for well over a decade.

Will they make a gulag in space also .....

Why did the thumnail change?

This is how the US space program will be after another gang of Democrats get into office.

Putinites are so sensitive 😂

im sure there is a a "joke" to be made there, a monkey, a rabbit, and a dog went to space...

I will never forget seeing a line of “stars” moving in the night sky and freaking out thinking it had to be UFO’s because there were just so many and in a near perfect line. I of course researched and found out it was Starlink lol. But man it was a sight to see.

Is this Juno?

And wheels were stolen

In Israel we need to get used back to paper maps and drive by signs. In certain areas GPS just does not work and put you in Beirut. Good thing I don't think I forget this skill 🙂