Space

Not Humanity’s Last View …

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This is being described as “humanity’s last view of the JWST.”

6:50 AM CST, Christmas Morning

I expect imaging, and even direct viewing, of the James Webb Space Telescope from terrestrial telescopes to become a popular amateur astronomical activity in the summer of 2022. Here is why:

A full Moon has apparent magnitude -12.7. This is the result of its distance of ≈380,000 kilometers, its effective area (a circle of radius ≈1,700 kilometers) of ≈9.1 million km ², and its albedo of ≈0.12.

The JWST will be at ~4 LD, the effective area of its sunshield will be ≈830 m ², and its albedo will be very close to 1.

Its distance makes it 16 times as faint, its effective area makes it 11 billion times as faint, and its albedo makes it 8.3 times as bright. Multiplying all these together yields a factor of 21 billion.

The magnitude scale is measured in increments of ⁵√100 ≈ 2.5, such that each 5 steps downward is 100 times brighter. Venus, which can reach an apparent magnitude of -4.7, is nearly 100 times brighter than Arcturus (α Boötis), at -0.05. The stars in the Big Dipper and in Orion’s Belt are around magnitude +2.

The limits of my experience are the Sun, apparent magnitude -26.7, and some of the fainter Pleiades, magnitude +6.5 or even fainter—note that this takes not only very clear, dark, moonless skies, but also an hour and a half or more of no artificial light whatsoever for excellent dark adaptation, and probably eyes younger than mine are now (I am recalling an incident from my 30s). That’s a factor of almost 20 trillion.

Anyway, doing the math, something 21 billion times fainter than a full Moon has an apparent magnitude of +13.1.

Every amateur astronomer reading this just went huh. Easy.

Taking the usual limiting magnitude of the unaided eye to be exactly +6 and the effective aperture of the human pupil to be 7mm, less than 200mm of primary lens or mirror diameter would be enough. In the real world, it’s going to be harder than that … but I found Pluto in my 333mm f/4.5 Newtonian at magnitude +13.8 or thereabouts during a Texas Star Party in the 1990s.

The challenge will be figuring out which thirteenth-magnitude speck in the field of view is actually the JWST, but one thing’s going to make it a lot easier: it won’t be moving with the starry background. Its motion will essentially be at the solar rate, ~1 °/day. That’s 2 ½ arc-minutes per hour, or 2 ½ arc-seconds per minute. A pair of images taken even a few minutes apart will pop it out, much like the discovery images of Pluto in 1930.

 

UPDATE (12/31): en route

Thoughts from a Cosmonaut

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Valentina Leonidovna Ponomaryova is a former Soviet cosmonaut: with a background in applied mathematics, she was selected in 1962 as a member of the first group of women cosmonauts.   Never got to fly a mission, though–she’d been scheduled to fly on Vostok 6, following Valentina Tereshkova’s scheduled flight on Vostok 5, but “Ponomaryova did not respond with standard Soviet cliches in interviews and her feminism made the Soviet leadership uneasy” and the crew assignments were altered. She later worked in orbital mechanics.

Interesting interview with her here.   Particularly interesting, IMO, are her thoughts about the respective roles of humans vs automated systems in spaceflight.

In the United States, spacecraft technology developed on the basis of aviation, and the respect for and trust in the pilot, characteristics of aviation, naturally transferred to spacecraft technology. In the Soviet Union, spacecraft technology was based on artillery and rocketry. Rocket scientists never dealt with “a human on board”; for them, the concept of automatic control was much easier to comprehend.

and

There is no doubt that, despite a large number of extraordinary and emergency situations, the Gemini and the Apollo programs were completed successfully because in the United States from the very beginning manned spacecraft were designed with orientation toward semi-automatic control systems in which the leading and decisive role was given to astronauts. The Gemini guidance system was already semi-automatic, and the Apollo guidance system was designed in such a way that one astronaut could perform all the operations necessary for the return from any point of the lunar orbit independently from information received from the Earth.

The opposites eventually met: semi-automatic systems constituted the “golden mean” that Soviet and American cosmonautics approached from two opposite directions: the Soviets coming from the automatic systems, and the Americans, one might say, from the manual ones.

Applicable to systems of many kinds in addition to spacecraft, I think, and many American organizations seem to be departing from the ‘golden mean’ in the direction of too much dependence on automated systems which are insufficiently understood and supervised.

Another Possible Explanation for the Absence of Space Aliens

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The physicist Enrico Fermi wondered why we haven’t seen any evidence of visitors from another planet, given that he believed intelligent life elsewhere in our galaxy was highly probable.  (Maybe we have seen such evidence, given some recent UFO incidents, but for the sake of argument…)  This question is known as Fermi’s Paradox.

Standard answers to the Paradox involve emphasizing the vast distances involved, and the fact that “as far as our galaxy is concerned, we are living somewhere in the sticks, far removed from the metropolitan area of the galactic center,” as Edward Teller put it.  Another theory is that species which are sufficiently intelligent to achieve interstellar travel have a tendency to blow themselves up long before they reach anywhere in our vicinity.

Don Sensing cited another possible explanation, suggested by Geoffrey Miller:

I suggest a different, even darker solution to the Paradox. Basically, I think the aliens don’t blow themselves up; they just get addicted to computer games. They forget to send radio signals or colonize space because they’re too busy with runaway consumerism and virtual-reality narcissism. They don’t need Sentinels to enslave them in a Matrix; they do it to themselves, just as we are doing today. Once they turn inwards to chase their shiny pennies of pleasure, they lose the cosmic plot. They become like a self-stimulating rat, pressing a bar to deliver electricity to its brain’s ventral tegmental area, which stimulates its nucleus accumbens to release dopamine, which feels…ever so good.

See my post here for thoughts related to the above explanation and the psychology of decadence.

But I have a new theory, suggested by recent events: The aliens invent something like Twitter, their whole planet becomes the equivalent of a particularly nasty middle school on earth, and they melt down under waves of mutual accusations and denunciations.

The Cuban Missile Crisis, as Viewed From a Soviet Launch Facility

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This month marks the 57th anniversary of the Cuban Missile Crisis, which brought the world dangerously close to thermonuclear war.

Several years ago,  I read  Rockets and People, the totally fascinating memoir of Soviet rocket developer Boris Chertok, which I reviewed  here.

Chertok’s career encompassed both military and space-exploration projects, and in late October 1962 he was focused on preparations for launching a Mars probe. On the morning of Oct 27, he was awakened by “a strange uneasiness.” After a quick breakfast, he headed for the missile assembly building, known as the MIK.

At the gatehouse, there was usually a lone soldier on duty who would give my pass a cursory glance. Now suddenly I saw a group of soldiers wielding sub-machine guns, and they thoroughly scrutinized my pass. Finally they admitted me to the facility grounds and there, to my surprise, I again saw sub-machine-gun-wielding soldiers who had climbed up the fire escape to the roof of the MIK. Other groups of soldiers in full combat gear, even wearing gas masks, were running about the periphery of the secure area. When I stopped in at the MIK, I immediately saw that the “duty” R-7A combat missile, which had always been covered and standing up against the wall, which we had always ignored, was uncovered.

Chertok was greeted by his friend Colonel Kirillov, who was in charge of this launch facility. Kirollov did not greet Chertok with his usual genial smile, but with a “somber, melancholy expression.”

Without releasing my hand that I’d extended for our handshake, he quietly said: “Boris Yevseyevich, I have something of urgent importance I must tell you”…We went into his office on the second floor. Here, visibly upset, Kirillov told me: “Last night I was summoned to headquarters to see the chief of the [Tyura-Tam] firing range. The chiefs of the directorates and commanders of the troop units were gathered there. We were told that the firing range must be brought into a state of battle readiness immediately. Due to the events in Cuba, air attacks, bombardment, and even U.S. airborne assaults are possible. All Air Defense Troops assets have already been put into combat readiness. Flights of our transport airplanes are forbidden. All facilities and launch sites have been put under heightened security. Highway transport is drastically restricted. But most important—I received the order to open an envelope that has been stored in a special safe and to act in accordance with its contents. According to the order, I must immediately prepare the duty combat missile at the engineering facility and mate the warhead located in a special depot, roll the missile out to the launch site, position it, test it, fuel it, aim it, and wait for a special launch command. All of this has already been executed at Site No. 31. I have also given all the necessary commands here at Site No. 2. Therefore, the crews have been removed from the Mars shot and shifted over to preparation of the combat missile. The nosecone and warhead will be delivered here in 2 hours

Chertok, who at this point was apparently viewing the Cuban affair as a flash in the pan that would be resolved short of war, was concerned that moving the Mars rocket would cause them to miss their October 29 launch date, and suggested that the swap of the rockets be delayed for a few hours. Kirillov told him that this was impossible, and that he should go to the “Marshal’s cottage,” where some of his associates wanted to see him. Chertok’s response:

Yes, sir! You’re in charge! But, Anatoliy Semyonovich! Just between you and me do you have the courage to give the ‘Launch!’ command, knowing full well that this means not just the death of hundreds of thousands from that specific thermonuclear warhead, but perhaps the beginning of the end for everyone? You commanded a battery at the front, and when you shouted  ‘Fire!’  that was quite another matter.

Kirillov:

There’s no need to torment me. I am a soldier now; I carry out an order just as I did at the front. A missile officer just like me, not a Kirillov, but some Jones or other, is standing at a periscope and waiting for the order to give the ‘Launch’ command against Moscow or our firing range. Therefore, I advise you to hurry over to the cottage.

At the cottage, four men were seated at a table playing cards while a fifth was trying to glean the latest news from a radio and Lena, the housekeeper, was in the kitchen drying wine glasses. It was suggested that since Chertok didn’t like playing cards, he should help Lena fix the drinks. This involved a watermelon and lots of cognac.

I took the enormous watermelon and two bottles of cognac out of the fridge. When everything was ready, we heard a report that U.N. Secretary General U Thant had sent personal messages to Khrushchev and Kennedy. Once again, Voskresenskiy took the initiative and proposed the first toast: “To the health of U Thant, and may God grant that this not be our last drink!” This time we all drank down our toast in silence and very solemnly, realizing how close we now were to a situation in which this cognac and this watermelon could be our last.

Still hoping to avoid the cancellation of the Mars mission, Chertok went to another cottage and, with considerable difficulty, made a forbidden call to S P Korolev, overall head of the Soviet rocket program, who was then in Moscow. Korolev told him that things were being taken care of and not to worry.

It was already dark when I returned to the Marshal’s cottage. On the road, a Gazik came to an abrupt halt. Kirillov jumped out of it, saw me, swept me up in a hug, and practically screamed: “All clear!” We burst into the cottage and demanded that they pour “not our last drink,” but alas! The bottles were empty. While everyone excitedly discussed the historic significance of the “All clear” command, Lena brought out a bottle of “three star” cognac from some secret stash. Once again the Mars rockets were waiting for us at the launch site and in the MIK.

Reflecting on the crisis many years later, Chertok wrote:

Few had been aware of the actual threat of a potential nuclear missile war at that time. In any event, one did not see the usual lines for salt, matches, and kerosene that form during the threat of war. Life continued with its usual day-to-day joys, woes, and cares. When the world really was on the verge of a nuclear catastrophe, only a very small number of people in the USSR and the United States realized it. Khrushchev and Kennedy exercised restraint and did not give in to their emotions. Moreover, the military leaders of both sides did not display any independent initiative nor did they deviate at all from the orders of their respective heads of state. Very likely, Khrushchev wasn’t just guided by the pursuit of peace “at any cost.” He knew that the U.S. nuclear arsenal was many times greater than ours. The Cubans did not know this and viewed Moscow’s order to call off missile preparation and dismantle the launch sites as a betrayal of Cuba’s interests. President Kennedy had no doubt as to the United States’ nuclear supremacy. The possibility of a single nuclear warhead striking New York kept him from starting a nuclear war. Indeed, this could have been the warhead on the R-7A missile that they didn’t roll out of the MIK to the pad at Site No. 1.

(cross-posted at Ricochet)

Sputnik Anniversary Rerun–Book Review: Rockets and People

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Today being the 62nd  anniversary of the Sputnik launch, here’s a rerun of a post about a very interesting book.

Rockets and People, by Boris E Chertok

Boris Chertok’s career in the Soviet aerospace industry spanned many decades, encompassing both space exploration and military missile programs. His four-volume memoir is an unusual documentpartly, it reads like a high school annual or inside company history edited by someone who wants to be sure no one feels left out and that all the events and tragedies and inside jokes are appropriately recorded. Partly, it is a technological history of rocket development, and partly, it is a study in the practicalities of managing large programs in environments of technical uncertainty and extreme time pressure. Readers should include those interested in: management theory and practice, Russian/Soviet history, life under totalitarianism, the Cold War period, and missile/space technology. Because of the great length of these memoirs, those who read the whole thing will probably be those who are interested in  all  (or at least most) of the above subject areas. I found the series quite readable; overly-detailed in many places, but always interesting. In his review American astronaut Thomas Stafford said “The Russians are great storytellers, and many of the tales about their space program are riveting. But Boris Chertok is one of the greatest storytellers of them all.”  In this series, Chertok really does suck you into his world.

Chertok was born in Lodz, Poland, in 1912: his mother had been forced to flee Russia because of her revolutionary (Menshevik) sympathies. The family returned to Russia on the outbreak of the First World War, and some of Chertok’s earliest memories were of the streets filled with red-flag-waving demonstrators in 1917. He grew up on the Moscow River, in what was then a quasi-rural area, and had a pretty good childhood“we, of course, played “Reds and Whites,” rather than “Cowboys and Indians””swimming and rowing in the river and developing an early interest in radio and aviationboth an airfield and a wireless station were located nearby. He also enjoyed reading“The Adventures of Tom Sawyer and Huckleberry Finn met with the greatest success, while Harriet Beecher Stowe’s Uncle Tom’s Cabin gave rise to aggressive moods’Heyafter the revolution in Europe, we’ll deal with the American slaveholders!” His cousin introduced him to science fiction, and he was especially fond of  Aelita  (book and silent film), featuring the eponymous Martian beauty.

Chertok remembers his school years fondlythere were field trips to study art history and architectural styles, plus a military program with firing of both rifles and machine gunsbut notes “We studied neither Russian nor world history….Instead we had two years of social science, during which we studied the history of Communist ideas…Our clever social sciences teacher conducted lessons so that, along with the history of the French Revolution and the Paris Commune, we became familiar with the history of the European peoples from Ancient Rome to World War I, and while studying the Decembrist movement and 1905 Revolution in detail we were forced to investigate the history of Russia.” Chertok purused his growing interest in electronics, developing a new radio-receiver circuit which earned him a journal publication and an inventor’s certificate. There was also time for skating and dating“In those strict, puritanical times it was considered inappropriate for a young man of fourteen or fifteen to walk arm in arm with a young woman. But while skating, you could put your arm around a girl’s waist, whirl around with her on the ice to the point of utter exhaustion, and then accompany her home without the least fear of reproach.”

Chertok wanted to attend university, but “entrance exams were not the only barrier to admission.” There was a quota system, based on social class, and  “according to the ‘social lineage’ chart, I was the son of a white collar worker and had virtually no hope of being accepted the first time around.” He applied anyhow, hoping that his journal publication and inventor’s certificate in electronics would get him in.” It didn’the was told, “Work about three years and come back. We’ll accept you as a worker, but not as the son of a white-collar worker.”

So Chertok took a job as electrician in a brick factory…not much fun, but he was soon able to transfer to an aircraft factory across the river. He made such a good impression that he was asked to take a Komsomol leadership position, which gave him an opportunity to learn a great deal about manufacturing. The plant environment was a combination of genuinely enlightened managementworker involvement in process improvement, financial decentralizationcolliding with rigid policies and political interference. There were problems with absenteeism caused by new workers straight off the farm; these led to a government edict: anyone late to work by 20 minutes or more was to be fired, and very likely prosecuted. There was a young worker named Igor who had real inventive talent; he proposed an improved linkage for engine and propeller control systems, which worked out well. But when Igor overslept (the morning after he got married), no exception could be made. He was fired, and “we lost a man who really had a divine spark.”  Zero tolerance!

Chertok himself wound up in trouble when he was denounced to the Party for having concealed the truth about his parentsthat his father was a bookkeeper in a private enterprise and his mother was a Menshevik. He was expelled from the Komsomol and demoted to a lower-level position.  Later in his career, he would also wind up in difficulties because of his Jewish heritage.

The memoir includes dozens of memorable characters, including:

*Lidiya Petrovna Kozlovskaya, a bandit queen turned factory supervisor who became Chertok’s superior after his first demotion.

*Yakov Alksnis, commander of the Red Air Forcea strong leader who foresaw the danger of a surprise attack wiping out the planes on the ground. He was not to survive the Stalin era.

*Olga Mitkevich, sent by the regime to become “Central Committee Party organizer” at the factory where Chertok was working…did not make a good first impression (“had the aura of a strict school matronthe terror of girls’ preparatory schools”)..but actually proved to be very helpful to getting work done and later became director of what was then the largest aircraft factory in Europe, which job she performed well. She apparently had too much integrity for the times, and her letters to Stalin on behalf of people unjustly accused resulted in her own arrest and execution.

*Frau Groettrup, wife of a German rocket scientist, one of the many the Russians took in custody after occupying their sector of Germany. Her demands on the victors were rather unbelievable, what’s more unbelievable is that the Russians actually yielded to most of them.

*Dmitry Ustinov, a rising star in the Soviet hierarchyaccording to Chertok an excellent and visionary executive who had much to do with Soviet successes in missiles and space. (Much later, he would become Defense Minister, in which role he was a strong proponent of the Soviet invasion of Afghanistan.)

*Valeriya Golubtsova, wife of the powerful Politburo member Georgiy Malenkov, who was Stalin’s immediate successor. Chertok knew her from schoolshe was an engineer who became an important government executiveand the connection turned out to be very useful. Chertok respected her professional skills, liked her very much, and devotes several pages to her.

*Yuri Gagarin, first man to fly in space, and Valentina Tereshkova, the first woman.

*Overshadowing all the other characters is Sergei Korolev, now considered to be the father of the Soviet space program although anonymous during his lifetime.  Korolev spent 6 years in labor camps, having been arrested when his early rocket experiments didn’t pan out; he was released in 1944.  A good leader, in Chertok’s view, though with a bad temper and given to making threats that he never actually carried out.  His imprisonment must have left deep scarswriting about a field trip to a submarine to observe the firing of a ballistic missile, Chertok says that the celebration dinner with the sub’s officers was the only time he ever saw Korolev really happy.

Chertok’s memoir encompasses the pre-WWII development of the Soviet aircraft industry…early experiments with a rocket-powered interceptor…the evacuation of factories from the Moscow area in the face of the German invasion…a post-war mission to Germany to acquire as much German rocket technology as possible…the development of a Soviet ballistic missile capability…Sputnik…reconnaissance and communications satellites…the Cuban missile crisis…and the race to the moon.

Some vignettes, themes, and excerpts I thought were particularly interesting:

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