Tag Archives: science fact

The third leg of the nuclear triad (The new Polaris sub-launched missile; 9-01-1959)

Let me tell you the story of a missile, one that should make us (ironically) a bit safer. 

Wehrner von Braun and his German team of scientists in Alabama developed a short-ranged nuclear missile called the Redstone back in 1953.  It was an evolution of the wartime V-2.  Then his team created the Jupiter intermediate-ranged nuclear missile, which has been used to launch a number of satellites into orbit, and which is in the process of being deployed in Italy and Turkey to threaten the Soviet Union.

There was originally an intent to mount the Jupiter missile on submarines.  This is the reason for its unusually squat shape–it was supposed to fit inside the tubes of a mammoth submersible ship.  The Navy quickly thought better of this idea and developed their own sub-launched missile–the Polaris.  Propelled by solid fuels, unlike the liquid-fueled Jupiter, the Polaris was recently test-flown for the first time.

This marks the beginning of a whole new era of nuclear warfare: Submarines are about to constitute the third leg of an atomic weapon triad. 

The first leg of the triad is the bomber, which has been a vehicle for nuclear weapon delivery since 1945.  Their weakness is that they can be shot down before dropping a bomb, and they take a comparatively long time to get to target.  On the other hand, they can be recalled or redirected as needed.

Missiles are the second leg, and have just come on station this year.  They include the Thor and Jupiter IRBMs and the new Atlas, Titan, and Minuteman ICBMs coming on-line shortly.  Missiles are incredibly fast and cannot be shot down.  They also cannot be recalled or redirected.

Both bombers and missiles can be destroyed on the ground by an enemy first-strike.  This is a dangerous situation for two nuclear superpowers to be in.  It ensures that both countries are always looking for an opportunity to deliver a knock-out punch, which could come at any time.  Bomber crews must be ready to scramble at a moment's notice.  Missile crews must be trained to launch their "birds" in minutes to get their weapons off the ground before being hit.  That readiness to retalliate at the first sign of a radar blip will check the other side's willingness to fire preemptively, but it also means a single mistake could bring about armageddon.  Hair-triggers are dangerous things.

This is why submarines are so important.  The enemy will never know where they are at any given time, thus they cannot be destroyed by a first-strike.  They can fire from almost anywhere, and they can be redirected and recalled like bombers.  They provide insurance that, even if the Soviets manage to destroy our missile and bomber forces in a first-strike, we will have a powerful retaliatory force.  They will help relieve pressure on the nuclear "button."

Of course, the Polaris isn't deployed yet.  For the next few years, we have a window of heightened tension wherein an Alas, Babylon scenario is possible, perhaps probable. 

Here's hoping that the world makes it to 1965 without blowing itself up. 

P.S. Galactic Journey is now a proud member of a constellation of interesting columns.  While you're waiting for me to publish my next article, why not give one of them a read!

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Trifecta (Discoverer V; Beacon 2; Titan failures; 8-15-1959)

The Air Force launched the fifth in its Discoverer series on August 13.  Like the last one, there were no passengers on-board (though the recovery capsule was bigger this time around).  Unlike the last flight, this one actually made it into polar orbit after its early afternoon launch from the deserts of California.  The second stage worked properly, and a tracking station in Kodiak, Alaska (as in "the State of") registered Discoverer's healthy "beep-beeps."

The plan was to eject the 300-pound recovery capsule after orbit #16 and attempt to catch it in mid-descent.  Unfortunately, what goes up does not always come down.  While a fleet of recovery ships and planes milled about impatiently in the Pacific Ocean, the capsule's retrorocket fired the craft upwards rather than back to Earth.  It is still in orbit, where it will remain for a long time.  It's a good thing there weren't any passengers (not that they would have survived anyway; I understand that the capsule's internal temperature was far lower than expected, and any rodentnauts would have ended up micicles).

Continuing in the vein of mission fizziles, Beacon 2, a 12-foot balloon satellite design to measure atmospheric density in orbit (there is air up there–just extremely tenuous), failed to orbit when the upper stages of its Juno II rocket misfired due to premature fuel depletion on the first stage.  It was a repeat of the failure of the first Beacon on October 23, 1958, which I did not cover for some unknown reason.  In that case, the upper stages of the Juno I rocket fired too early. 

Not quite a space shot, there was a third noteworthy rocket failure this week.  At the Atlantic Missile Range yesterday, there was a triple-launch of new missiles: the Thor IRBM, which has been heavily employed both as a military system and as a launch system, the Polaris sub-launched missile, and the new Titan ICBM.  The first two had good launches, though the camera package in the nosecone of the Thor has not been recovered from the Atlantic ocean.  The Titan blew up on the stand, however.

Still, while it is disappointing to read about so many failures in one week, it is exciting that launches are occurring so frequently.  Moreover, Explorer VI continues to do yeoman's work in orbit, supplanting Sputnik III (which failed in early May) as the most advanced space laboratory.

Next time–Astounding (packed with… yech… Garrett)!

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Earthbound Pioneer (Explorer VI; 8-08-1959)

We are now in the second phase of the Space Race.

Decades from now, people will debate over the exact date of the turning point.  Some will argue that it started when countries started sending rockets to the moon, leaving the shackles of Earth's orbit.  Others will say that spaceflight didn't leave its infancy until humans had been sent into space.

But, I contend that a whole new ballgame opened up yesterday with the launching of Explorer VI.

This latest satellite is, in some ways, just an evolutionary step.  Its payload of experiments is little different from the slew of instruments carried by its predecessors, the Air Force Pioneers.  It's got geiger tubes and scintillators for measuring cosmic rays, magnetometers for mapping Earth's magnetic fields, a micrometeroid detector, and a crude TV camera–all devices that went up on the ill-fated Pioneer II.

But, the probe also has an impressive array of solar cells affixed to four paddle wheels that make Explorer look like a little windmill.  Moreover, the satellite is equipped with two communications systems.  One of them is analog, like those employed by all previous satellites, in which information is communicated by modulating the amplitude and/or frequency of transmissions, like your AM or newfangled FM radio.  The other is digital using nothing but streams of ones and zeroes.  This method is far less prone to error and noise, and it uses bandwidth more efficienctly, requiring less power.

A digital system is above and beyond the needs of an orbital probe, so why bother including it?  Because Explorer VI is a test-bed.  A spacecraft very much like it will be launched to Venus some time in the near future, and it will need a digital system to communicate from that vast 25 million mile distance.

Until Explorer VI, we were launching little experiment packages.  Now, we have a bonafide orbital scientific and engineering laboratory in space, the results of which will revolutionize where spaceflight goes from here.

A natural extension of this is that I don't have this satellite's results for you yet.  Unlike my other columns, where I've been able to sum up a mission and its findings generally in one article, Explorer VI is going to collect mountains of data, and it will take time to sort it out. 

So stay tuned! 

P.S. The October 1959 issue of Galaxy has come out.  I'm half-way through and will be telling you all about it next week.  Come join me in my journey (but try not to send me letters about it until I publish the articles).

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Loveliest of Bodies (Venus, 7-25-1959)


from Timothy Gleason

Ishtar, Aphrodite, Venus—whatever you call it, the brightest of star-like objects in the sky has mesmerized humans for the entirety of recorded history, and likely beyond.  It was among the first subjects of telescopic study, and you can bet it will be the first planetary target for space probes.

It is astonishing that, given all of the interest the Planet of Love has engendered, we know so little about our nearest planetary neighbor.  The 2nd planet from the sun, Venus is an orb of mystery–she has been most reluctant to divulge her secrets. 

Galileo saw that Venus went through phases, like the moon, and deduced that Venus was bright with reflected sunlight.  Through transits of the sun (which happen twice a century—I hope I live to see the next ones in 2004 and 2012), we have learned that Venus has a thick atmosphere.  More recently, it has been determined that Venus’ atmosphere contains several hundred times the concentration of carbon dioxide as ours.  Measuring the Doppler shift of the planet’s edges, it appears that the planet rotates very very slowly, perhaps taking months to complete a rotation. 

From the planet’s period and effect on other planets, we know that its mass is actually quite close to that of the Earth, just a touch smaller.  It almost certainly has a rocky surface.  For these reasons, many have called Venus “Earth’s twin.”

Being closer to the sun, it is likely that Venus is much hotter than the Earth, but it is difficult to say how much hotter.  It used to be thought that the surface of Venus might be a global, steaming ocean, but it is more widely believed now that there is no liquid water to be found, and perhaps precious little in the atmosphere.


From Exploring the Planets (c) 1958


From Exploring the Planets (c) 1958

But that’s all we know!  The clouds are too thick to see through, so we can’t see the surface as we can with Mars.  Perhaps in the near future, microwave and radio astronomy will be keys to mapping Venus, but for now, it’s just a silvery pearl.

Now, every year or so, when the alignment of planets is right, we have an opportunity to send a probe to Venus on a low-energy orbit that accommodates the largest payload for any given booster.  The next one will be in November.  Sadly, though NASA did have plans to launch a Venus mission this year, it has been pushed back due to development teething troubles.  A test satellite with prototype equipment will be sent into orbit next month; if it does well, it bodes well for a Venus probe, though such won’t launch until the latter half of next year.

It may well be that the Soviets beat us to the punch.  Look for a launch later this year (but note that their opportunities are slightly different from ours as they launch from a different part of the globe).

Next up—a review of the latest IF!

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Exploring the ground (7-22-1959)

Just a quick stop-press today while I wait for the new magazines to come in.  Apparently, NASA tried another satellite launch last week on the 16th.  A Juno II rocket, which is a modified Jupiter Intermediate Ranged Ballistic Missile, had the latest in the Explorer series installed at its tip.  Weighing 42 kilograms (that’s 92.4 pounds for the metrically uninitiated), it looked a bit like a bigger Pioneer 1–two truncated cones welded together at their base. 

As might be expected from the choice of booster, it’s a product of Von Braun’s Alabama Army-sponsored team (which, rumor has it, may well be folded into NASA proper soon).

Its instrument complement was pretty standard stuff: geiger counters, x-ray detectors, micrometeoroid plates, thermometers.  What makes this craft special are the solar power elements built into the design; the probe was built to provide long-term measurements of cosmic radiation and the Earth’s heat balance. 

Sadly, the rocket lost power to its guidance system immediately after launch, and the thing started to spin in a wide, dangerous ark.  A range controller detonated the booster just 5 and a half seconds into the flight.  Too late for the Fourth of July, and I doubt the scientists were pleased.

I understand that the next flight of the package is scheduled for October.  My fingers are crossed, but I understand NASA is planning an Air Force-contracted shot next month, and that probe, made by my friends at Space Technology Laboratories, may well include all of the same instruments and more.

Thus, the Space Race continues domestically as well as abroad.  Nothing like good ol’ fashioned American competition to keep the satellite makers on their toes! 
See you soon!

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Space Dogs and opportunity costs (7-14-1959)

It’s another flight for Otvazhnaya, the daring Space Dog, in another zoological journey.  This time Otvazhnaya was joined by a different dog from last time (named “Pearl,” or the Russian equivalent thereof) as well as a bunny, whose name I do not yet know.  The flight, which took place on July 10, appears to have been a duplicate of the July 2 flight.

According to TASS, the Soviet news agency, the purpose of the flight was to collect more data on the effects of radiation on living creatures.  Per the agency, the space environment is not overly dangerous to space travelers.  I imagine the flight was also to make sure that the spacecraft parachutes worked properly, since rapid impact with the ground is overly dangerous for space travelers.  The rocket also contained a number of scientific instruments, too, for measuring the nearer regions of space.

All very exciting stuff, and it points to a level of progress very similar to our own.  One wonders how much the Soviets must allocate to their space program to match our systems.  While the Soviet Union looks big on a map, and it looms large in our headlines, there is no doubt that their economy is much weaker than ours.  That they can afford to have regular launches means other fields (say apartment construction, food production, automobile manufacturing) must be suffering.

You won't hear about that from TASS, of course…

In two days, this month's Astounding!



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Space Bunnies! (July 9, 1959)

It’s time for a Space Race update!  I hear mixed cheers and groans.  Well, it takes all kinds to make a column…

The Soviets have launched a rocket into space, apparently on a sub-orbital path using an equivalent to our Jupiter IRBM, with several living passengers.  They are the dogs, Otvazhnaya and Sznezinka, as well as the first Space Bunny, Marfusa.  The flight apparently took place on July 2, and all animals reportedly returned safely to the Earth.  In fact, if the report be believed, this was Otvazhnaya's third such flight.  Given the long press delay and the lack of reporting on failures, I take Soviet press releases with several grains of salt.

Still, if it’s accurate, it means that the Soviets figured out animal recovery well ahead of us.  I’d estimate that the Communists are about half a year closer to a manned mission than we are.

Speaking of estimations, take a gander at IMPACT OF US AND SOVIET SPACE PROGRAMS ON WORLD OPINION, hot off the presses of the USIA Office of Research Analysis.  As it says on the tin, it’s a fascinating snapshot of domestic and world opinion of the space program.  It’s short, so do read it.

In particular, I liked the point that Space Race reporting has become more rational, less sensational.  I also enjoyed seeing the breakdown of those nations who feel the U.S.S.R. is ahead in the Race versus those who feel the U.S.A. is in the lead.  The distribution is predictable, I think.

Per the report, virtually all reporting links the space programs of the two superpowers with their military programs, which I think is sensible.  That said, it is my understanding that there is increasing resistance in the U.S. Congress to letting the Army team under Von Braun continue development of the enormous Saturn rocket.  It’s just too big to serve any practical military service, it is said.  If the program is transferred to NASA, our fledgling civilian space program, perhaps we will have a truly inspiring non-military space presence. 

If we can forget what Von Braun’s job was just 14 years ago.  Ah well, “Once the rockets are up, who cares where they come down!” as one wise man has observed.


Image by Starbound

See you in two days!



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Two for two (Vanguard and Discoverer failures; 6-26-1959)

It's another Space Race update from The Traveler!

A Vanguard went up on the 22nd, but I decided to hold off on writing a column as I knew a Discoverer was set to launch on the 25th.  I'm afraid I've got a double-whammy of disappointment for my good readers.

This new Vanguard had two thermistors (heat-activated electrodes) adorning the magneisum-alloy skin of the 20" diameter sphere, one facing the sun, one facing inward.  The point of this experiment was to measure the heat balance of the sun's radiation on the Earth.  Why is this important?  The primary engine for the Earth's weather is the sun's heating of the atmosphere.  Hot air rises, cold air sinks, and the spinning Earth mixes all of this thoroughly and chaotically.  If we knew how strong the sun's rays were at various latitudes, we could correlate these findings to heat flow in the lower atmosphere and learn a great deal.


NASA photo–I don't know who those folk are.

The rocket soared out of sight of observers, seemingly on a flawless trajectory.  However, it appears that one of the second-stage pressure valves was faulty; no signal from the satellite was ever caught on the ground by any of the many Minitrack receiving stations around the globe.

The sad news is that there is only one booster left to the Vanguard program.  After the next shot, it's all over.  I hope these experiments don't get abandoned!


From a postcard I picked up this week–wishful thinking, as it turned out.

Discoverer 4 took off yesterday, and it seemed to be a good launch, but then the second stage (the "Hustler") failed, and the payload never reached orbit.  From the press releases, the Air Force was testing a new capsule designed to carry monkeys.  Given that there were no actual passengers on the mission, I can think of two possibilities:

1) The Air Force doesn't want to actually send up any more animals lest the critter-lovers of the world let out a cry and hue (bigger than they already have), at least until the flyboys have perfected their rockets, or

2) There was a payload on Discoverer 4 equipped with eyes, but it wasn't an animate one.

Which one do you think is more plausible?

In other news, my F&SF and Astounding magazines have come in for this month, and I picked up last month's IF as well.  I'm also reading Sam Merwin's Well of Many Worlds, one of the first "sideways in time" stories.  So expect a lot of fiction reviews in the near future!



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Four blind mice (Discoverer III;6-04-1959)

It's a bad time to be an experimental animal, if there ever was (or will be) a good one.

The Air Force launched Discoverer III last night with a payload of four plump black mice.  As you know, if you read the papers or my column, Discoverer is a satellite program for shooting missions into polar orbit (i.e. over the poles, ultimately covering the entire Earth) ostensibly for the purpose of sending biological specimens into space and then recovering them in a detachable capsule. 

Of course, a polar orbit is particularly good for reconaissance, and a detachable capsule can carry film as well as mice.  I'm sure the Soviets aren't buying the "space science" angle any more than I am.  Still, if we get any science out of the program, that's an added bonus.

Unfortunately, the mice of Discoverer III can't catch a break. Last week, the launch was scrubbed because telemetry from the mice had ceased.  The technicians thumped on the nose cone, thinking the mice were asleep.  They were, in fact, dead, having eaten the krylon coating of their cages.

A few days later, the launch was scrubbed when the nose cone sensors returned a 100% humidity level.  Turns out that the mice had urinated on the sensors (a similar incident looks to have happened on one of last year's Thor-Able flights).

Yesterday, the rocket finally launched, but the second stage of the Thor-Hustler rocket flipped the payload and drove it straight into the Pacific ocean.  Nothing could have survived that. 

I understand that this incident has piqued the ire of several organizations promoting the ethical treatment of animals, particularly as this comes right on the heels of a suborbital Jupiter test flight on May 28, which had the monkeys, Able and Baker, as unwitting passengers.  Though the mission was a success, I have it on good authority that Able died the other day after an unsuccessful surgery to remove an electrode.  Six months before, a similar flight resulted in the death of its passenger, Sam the monkey.  I wonder if the Air Force will abandon the pretense of the bio-medical mission and just launch cameras from now on.

So that's that.  I believe there's another Discoverer launch scheduled in a few weeks along with another Vanguard shot.  I'll report on them if and when they happen.  In the meantime, I hope you enjoyed this month's Galaxy, and I'll finish up my report on the August issue in two days!

In the meantime, let's hoist a glass to our intrepid, lost rodentnauts.  You deserved better.

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The shape of things to come!  Part 2 (New rockets; May 17, 1959)

My cup runneth over!

When I started this column, I had worried that the increasing paucity of new science fiction would mean I'd run out of things to write about.  Now, here we are seven months later, and I have a back-log of items on which to report.  I suppose I shall just have to write constantly to get it all out.  I hope you don't mind…

First in the queue, I wanted to wrap up the Homer Newell article I reported on five days ago, about America's new stable of rocket boosters.  Last time, I talked about the new rockets expected to be in used by 1960.  Now, let's press on a few more years into the future for a truly exciting sneak peek.

With the exception of the Vanguard and (soon-to-be) Scout, all of our space rockets are really borrowed military missiles.  But as time goes on, we will see more purpose-built boosters that will be more powerful and efficient.  The first true space rocket vehicles will be second stages designed to go on the Atlas ICBM, currently our biggest military missile. 

The smaller of them, the Vega, is a purely civilian design that will be developed from the first stage of the Vanguard.  The Atlas-Vega will to launch satellites into geo-stationary orbit for the first time.  A bit of explanation as to the import of this: the Earth rotates on its axis every 24 hours.  The period of a satellite's orbit is dependent solely on its distance from Earth–the closet the satellite orbits, the shorter the period.  Right now, our best rockets can barely get satellites into a low orbit with a period of about 90 minutes.  But the Atlas-Vega will propel satellites up to a height where the period matches the period of the Earth's rotation.  This means the satellites will, to a ground observer, appear to be stationary (or at least will wobble about around a fixed place in the sky).  Arthur Clarke wrote about the value of these satellites more than a decade ago; they will be way-stations for global communications.

An even bigger stage is the Centaur, which will launch truly massive payloads to the moon and to the planets.  By the middle of the next decade, expect orbiting laboratories around Earth's closest celestial neighbors.  To me, this is more exciting than sending a person into space, who probably won't be able to do much but give entertaining color commentary.

The real wave of the future is likely to be Von Braun's new brainchild–the Saturn family of rockets.  These boosters are being developed completely from scratch and will be an order of magnitude bigger than anything currently in the pipeline.  The biggest of them, the Nova, will be capable of landing 20 tons on the moon in one go!  We may well see people on the moon by 1967. 

My favorite part of the article is Dr. Newell's personal appeal to us, the citizen-scientists of the nation, to send in proposals for experiments.  NASA is brand-new, and they need all the help they can get to develop not just the hardware, but the ideas that will drive the creation of the hardware.  It's scientific democracy and it's greatest, and perhaps it will prove an advantage over the Soviet system.

Day-after-tomorrow: Invisible Invaders!  There are A-movies, and there are B-movies.  This was not an A-movie.  The popcorn was yummy, though!

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