Tag: history

Clickspring – Recreating the ancient engineering that built the Antikythera Mechanism

6:01 pm

An evening pause: For background, the Antikythera Mechanism is an archaeological artifact from ancient Greece:

The Antikythera Mechanism is the oldest known scientific computer, built in Greece at around 100 BCE. Lost for 2000 years, it was recovered from a shipwreck in 1901. But not until a century later was its purpose understood: an astronomical clock that determines the positions of celestial bodies with extraordinary precision.

Today’s pause shows how this very complex mechanism, that includes many metal gears, might have been made by hand, without electricity and our modern tools.

Hat tip Cotour.

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Just as I refuse to say “native American”, I refuse to say “Gulf of America”

1:57 pm

A British map from 1700, with the Gulf of Mexico labeled at
A British map from 1700, with the Gulf of Mexico
labeled at “The Great Bay of Mexico”

The recent effort by Donald Trump to get the name of the Gulf of Mexico changed to the “Gulf of America” appears at first glance to have many laudable aspects, the most important of which his desire to energize the American people to have pride in their country. For too long young Americans have been indoctrinated with the anti-American Marxist poison pushed by our modern bankrupt academic community, and have thus been trained to think timidly and with hate about their own country.

Advocating this name change is Trump’s way of quickly countering that negativity. The United States is founded on noble principles — “life, liberty, and the pursuit of happiness” — and it has lived up to those ideals with remarkable success during its entire 250 year history. Thus, Americans have plenty to be proud of, and to Trump’s mind something needed to be done to underline that fact.

Hence, his push to change the “Gulf of Mexico” to the “Gulf of America.”

And yet, as much as I support his general effort to invigorate Americans to their glorious past, to my mind this particular effort by Trump is as false and as shallow as the left’s never-ending demands that we use new language for everything. American Indians should be “native Americans”, even though everyone born in the U.S. is native. “Chairman” must become “Chair” or “Chairperson,” even though such usage is ugly and unnecessary. Spaceflight can never be “manned,” football teams can’t be “Redskins,” and “communists” must now be called “progressives.”

And worst of all we must all use the pronouns demanded by perverts, even if when by doing so we are denying reality.

Such abuse of language offends me, as a writer. » Read more

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“Was this trip necessary?”

6:01 pm

An evening pause: On Memorial Day, let’s revisit an evening pause from 2011 of one short scene from the William Wellman film, Battleground (1949), to remind us why sometimes it is necessary to fight a war.

The saddest thing about this clip is how ugly it makes too many modern Americans look, for they have adopted the certain, ignorant, and bigoted aspects of the totalitarians from the 1930s and 1940s that the generation then fought so hard to defeat. Today’s American totalitarians — almost all of whom are on the left — are certain that because Donald Trump is doing things they disagree with, he along with all of his supporters should be killed. No debate is permitted. They are right and anyone who challenges them is evil.

Memorial Day is not simply about remembering the dead so that they will not have died in vain. It is also about remembering why they died.

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The real reason we celebrate Memorial Day

9:38 am

Francis James Floyd's plane after crash

To the right is another cool image, but this one has nothing to do with astronomy, though you will likely be hard pressed to figure out exactly what you are looking at without some study. It is clearly some broken metal object inside a forest, but identifying its exact nature is not obvious.

What you are looking at is the remains of a propeller plane (likely flown on a reconnaissance mission) that crashed in the jungles of Vietnam during that long and tragic war of the 1960s and 1970s. Most amazingly, despite its twisted nature, the pilot survived and was fortunately quickly rescued by American troops before the arrival of the Vietcong.

That pilot’s name was Francis James Floyd. His son Jeffrey, a regular reader of Behind the Black, sent me the picture to illustrate that guys who fly wingsuits are not the only ones willing to do crazy things in the air. As he wrote,

Our dad fought in WWII, Korea and Vietnam as an Air Force pilot. While he had to learn how to parachute jump, he hated it. Even if the engine(s) failed, as long as he had his wings attached, he would not exit (jump). He said “There are two kinds of people that jump out of airplanes: idiots, and people in the armed services.”

So, the attached photo is what was left of his plane in Vietnam. He used the tops of the forest trees to try to slow down, like skimming the water. Fortunately, the good guys reached him first, and he came home.

Francs Floyd however was not an exception or rare thing, like the wingsuit fliers are today. He was one of a massive generation of Americans who, after the Japanese attack on Pearl Harbor on December 7, 1941, quickly enlisted to defend the United States and — more importantly — its fundamental principles of freedom and limited government.

Floyd was only twenty when he enlisted in 1942. He had no flight experience, but was quickly trained to become a pilot who flew fighter bomber missions over Italy. Later he returned to fly in the Korean War, and then again in Vietnam. As his son adds,
» Read more

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In telling us why they are fleeing Trump America, three Yale professors prove they are unqualified for their jobs

12:11 pm

What many now label the
The “Poison Ivy League” may have finally
gotten better!

Good riddance! In a New York Times op-ed on May 14, 2025, three former Yale professors attempted to explain why they have quit their jobs at Yale and moved to teach in Canada at the University of Toronto.

Unbeknownst to them, their idiotic and ignorant reasons for leaving demonstrated that they are actually completely unqualified to be college professors, and that Yale (and the United States) will be better off without them.

Professor Stanley is leaving the United States as an act of protest against the Trump administration’s attacks on civil liberties. “I want Americans to realize that this is a democratic emergency,” he said.

Professor Shore, who has spent two decades writing about the history of authoritarianism in Central and Eastern Europe, is leaving because of what she sees as the sharp regression of American democracy. “We’re like people on the Titanic saying our ship can’t sink,” she said. “And what you know as a historian is that there is no such thing as a ship that can’t sink.”

Professor Snyder’s reasons are more complicated. Primarily, he’s leaving to support his wife, Professor Shore, and their children, and to teach at a large public university in Toronto, a place he says can host conversations about freedom. At the same time, he shares the concerns expressed by his colleagues and worries that those kinds of conversations will become ever harder to have in the United States.

As noted in this analysis of their actions, all three say they are doing this because they have studied fascism and thus “equate ‘Make America Great Again’ with Adolf Hitler’s ‘Ein Volk, ein Reich, ein Führer.'”

The analogy is so weak and incoherent as to be laughable. As the essayist in this second link notes, it cheapens the meaning of fascism and in fact suggests these three “professors” don’t have the slightest idea what the word means, despite their claim they have studied it.

More important however are the three quirks of personality illustrated by their position and actions that signify why their are unqualified to be professors to begin with.
» Read more

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NASA re-releases a slew of Hubble images to celebrate its 35th anniversary

9:23 am

Eta Carina, in focus, after 1993 repair mission
Eta Carina, in focus, after 1993 repair mission

As part of its celebration of the telescope’s 35th anniversary, NASA on April 25, 2025 re-released what it called 27 key images from the history of the Hubble Space Telescope.

More than half the images are historical, showing the telescope’s conception by astrophysicist Lyman Spitzer, its construction, its launch in 1990, and its repair in 1993 of its faulty optics. The subsequent sharp astronomical images include only a few of Hubble’s most famous and significant later photographs, including the first Hubble Deep Field, the Hourglass planetary nebula, and the Pillars of Creation snapshot.

What NASA did not include in this collection however was without doubt to those alive at the time after Hubble was finally repaired its most historically significant photo. That picture is to the right. It shows the exploding star Eta Carina as taken by Hubble in 1993 right after its repair.

For the very first time, we had a telescope above the Earth’s fuzzy atmosphere capable of taking sharp in-focus images of the mysteries of the heavens. And for the first time, we could see in this star its actual nature. It wasn’t simply surrounded by a pretty cloud — as all previous ground-based images had suggested — that cloud was formed by eruptions from the star itself. Those earlier eruptions, which had occurred in the previous century, had spewed from the star’s poles, forming two bi-polar clouds that were expanding away from the star most dramatically.

In the three decades since astronomers have used Hubble and its later upgraded cameras to track those expanding clouds, with the most recent photo taken in 2019. Hubble has shown that such massive heavenly objects are not static, but evolving, and with the right high resolution telescopes in space we can track that evolution, in real time.

At the moment no comparable replacement of Hubble is planned, or even on the drawing board. The Einstein space telescope, just launched, will provide magnificent optical images at a slight lower resolution. So will China’s planned Xuntian space telescope, set for launch in 2027. Neither however matches Hubble’s capabilities.

And Hubble is now long past its original lifespan of fifteen years. Though engineers say it is in good shape, this is not true. It presently has only two trustworthy working gyroscopes. To extend its lift, the telescope is operated on only one gyroscope, with a second held back in reserve. When these go, however, so will Hubble.

Meanwhile, the astronomy community continues to put most of its energy in building giant ground-based telescopes that not only cannot match Hubble but are threatened by the coming wave of new communication constellations. Do they rethink their approach and shift to orbital astronomy?

Nah. Instead, the astronomical community demands new powers to to ban those constellations!

Of all people, one would think astronomers more than anyone else would not put their head in the sand. But that’s what they continue to do.

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An American government program to get to the Moon is simply not necessary; If we let them Americans will do it on their own

12:08 pm

As a historian I often bring to any discussion of modern politics and our American space effort a perspective that is very alien to modern Americans. I see things as they once were in the United States back before we had a big overbearing federal government that everyone looked to for leadership. Instead, I see the possibilities inherent in a free nation led by the people themselves, not the government, as America was for its first two centuries.

This sadly is not how America functions today, and it is for that reason that as a nation we can no longer get great things accomplished routinely, as we once did.

Norwegian Amundsen, first to reach the south pole
Norwegian Amundsen, first to reach the south pole.

To understand how different the American mindset once was, consider just one example, the 19th century effort by numerous nations and individuals to plant their flag at both the north and south poles. While a handful of private American citizens mounted their own expeditions to reach the north pole, none attempted to do so in Antarctica. At both poles the bulk of the effort was done by other nations, sometimes on expeditions privately funded, and sometimes by expeditions with extensive government aid.

In the U.S. however there was no government program to compete in this race. Nor was their the slightest desire by Americans to create one. The attitude of Americans then was very straightforward. They found the race to get to the poles exciting and fascinating, and thoroughly supported the efforts of the explorers both intellectually and emotionally. They however had no interest in their government committing one dime of their tax dollars on its own campaign.

You see, they did not feel a need to establish American prestige in this manner. So what other nations got to the poles first? What mattered to Americans then was what each American wanted to do, and what Americans wanted to do in the 19th century was to settle the west and build their nation into a prosperous place to raise their children.

And so, the south pole was first reached by a Norwegian, followed mere weeks later by an Englishman. Americans played no major role in that early exploration. Nor did it harm America’s prestige in the slightest that it did not compete there. The nation was growing in wealth and prosperity, its citizens were completely free in all ways to follow their dreams, and everyone worldwide knew it.

America might not be the leader in far-flung exploration, but the world knew it was the leader in something as important if not more so, the idea that a nation and a government could be built on the premise that the citizen is sovereign, and that all law should be based on making that citizen’s life, liberty and the pursuit of happiness primary in all things.

And in the end, it did not really matter that the U.S. did not compete in that race to the poles. » Read more

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April 7, 2025 Quick space links

3:28 pm

Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.

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Alison Balsom – Introducing the Baroque Trumpet

6:01 pm

An evening pause: Another music history lesson to start the weekend. As she says, listening to baroque music played on this instrument explains a great deal about that music, and definitely tells you what that music was expected to sound like when composed, compared to playing it on modern instruments. Far more haunting, a word I would never have used to describe Baroque music before.

Hat tip Judd Clark.

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Hal Holbrook – Lincoln’s second inaugural address, in honor of his birthday

6:01 pm

An evening pause: I last posted a recreation in April 2017. Today, on Lincoln’s birthday, I present a recreation by Hal Holbrook, performed live on the Ed Sullivan Show on February 13, 1966.

As I wrote in 2017, “Listen to the words, however. This is no pandering speech, as we routinely see today. It is hard, muscled, and honest, bluntly recognizing that all, from both sides of the Civil War, must pay for the scourge of slavery.”

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Arthur Clarke in 1964 predicts the future in 2000

6:01 pm

An evening pause: Something to ponder over the weekend. The video only includes two short clips from this 1964 BBC show, and thus picks two that have ended up to be largely right. And though Clarke’s predictions were not all right, he hit the mark an incredibly high number of times.

Hat tip John Jossy.

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The global launch industry in 2024: A year of amazing highs and depressing lows, with the best yet to come

9:40 am

For the past five years the entire global rocket industry has experienced a revolution that has resulted in a rise in global launch numbers unprecedented since the launch of Sputnik in 1957. 2024 was no different, with the total number of successful launches topping 256, two to four times the average number of launches that had occurred yearly prior to 2020.

This success has almost entirely been driven by the arrival of many private rocket companies competing for government and commercial business — led largely by SpaceX — aided by the decision by governments worldwide to get out of the way and let private enterprise do the job. The result has been spectacular, so much so that it now seem possible in the very near future to see humans finally revisiting the Moon and even getting to Mars and the asteroids.

At the same time, 2024 saw some significant signs that this success is not guaranteed, and could vanish in an instant if care is not taken.

The graph below, my annual count of launches world wide, provides the groundwork for these conclusions.
» Read more

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The known history of the Colossus of Rhodes

9:16 am

New research provides a more detailed and realistic history of the 100-foot-high statue from the ancient world called the Colossus of Rhodes.

The Colossus was a 30-metre-high bronze statue of the god Helios, built to commemorate the victory of the Rhodians over Demetrius of Macedonia, and considered one of the Seven Wonders of the Ancient World. Completed in 282 BCE, it fell in an earthquake only 56 years later in 226 BCE. The usual story is that the fragments remained untouched for 880 years until the invasion by the Umayyad caliph Muawiya I. However, literary and geological evidence suggest a more complex, and more likely, story involving several reconstructions, finishing with a devastating earthquake in 142 CE.

No one knows what it looked like or even the exact place it stood. The research ties its history however to the known earthquakes and later that had taken place at Rhodes, and thus provides a reasonable timeline for its destruction and removal. It also debunks this bit of “misinformation”:

In popular imagination, the Colossus stood astride the harbour entrance with ships sailing between his legs. This idea was first mentioned by an Italian pilgrim in 1395, who wrote that the Colossus stood with one leg at the end of the mole with the windmills and the other near St John’s chapel, later a fort. These sites are 750 metres apart, necessitating a statue 1500 metres high — a truly colossal edifice even by modern standards

The reason we don’t know where the statue actually stood is because the bronze used to forge it was exceedingly valuable. Once it was determined it could not be rebuilt that bronze did not remain in place for long.

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Repost: The real meaning of the Apollo 8 Earthrise image

1:56 pm

I wrote this essay in 2018, to celebrate the fiftieth anniversary of the Apollo 8 mission to the Moon. I have reposted previously, but I think it is worth reposting again and again, especially because stories about Apollo 8 still refuse to show the Earthrise image as Bill Anders took it. Even today, the Air and Space Museum did it wrong again, and it seems to me to be a slap in the face of Anders himself, who died this year while flying.
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Earthrise, as seen by a space-farer
Earthrise, as seen by a space-farer

Today is the fiftieth anniversary of the moment when the three astronauts on Apollo 8 witnessed their first Earthrise while in orbit around the Moon, and Bill Anders snapped the picture of that Earthrise that has been been called “the most influential environmental picture ever taken.”

The last few days have seen numerous articles celebrating this iconic image. While all have captured in varying degrees the significance and influence of that picture on human society on Earth, all have failed to depict this image as Bill Anders, the photographer, took it. He did not frame the shot, in his mind, with the horizon on the bottom of the frame, as it has been depicted repeatedly in practically every article about this image, since the day it was published back in 1968.

Instead, Anders saw himself as an spaceman in a capsule orbiting the waist of the Moon. He also saw the Earth as merely another space object, now appearing from behind the waist of that Moon. As a result, he framed the shot with the horizon to the right, with the Earth moving from right to left as it moved out from behind the Moon, as shown on the right.

His perspective was that of a spacefarer, an explorer of the universe that sees the planets around him as objects within that universe in which he floats.

When we here are on Earth frame the image with the horizon on the bottom, we immediately reveal our limited planet-bound perspective. We automatically see ourselves on a planet’s surface, watching another planet rise above the distant horizon line.

This difference in perspective is to me the real meaning of this picture. On one hand we see the perspective of the past. On the other we see the perspective the future, for as long humanity can remain alive.

I prefer the future perspective, which is why I framed this image on the cover of Genesis: the Story of Apollo 8 the way Bill Anders took it. I prefer to align myself with that space-faring future.

And it was that space-faring future that spoke when they read from Genesis that evening. They had made the first human leap to another world, and they wished to describe and capture the majesty of that leap to the world. They succeeded beyond their wildest dreams.

Yet, they were also still mostly Earth-bound in mind, which is why Frank Borman’s concluding words during that Christmas eve telecast were so heartfelt. He was a spaceman in a delicate vehicle talking to his home of Earth, 240,000 miles away. “And from the crew of Apollo 8, we close with good night, good luck, a Merry Christmas, and God bless all of you — all of you on the good Earth.” They longed deeply to return, a wish that at that moment, in that vehicle, was quite reasonable.

Someday that desire to return to Earth will be gone. People will live and work and grow up in space, and see the Earth as Bill Anders saw it in his photograph fifty years ago.

And it is for that time that I long. It will be a future of majesty we can only imagine.

Merry Christmas to all, all of us still pinned down here on “the good Earth.”

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Binbam – What is Hanukkah?

6:01 pm

An evening pause: Most of this season I honor the Christmas holiday for my Christian readers with pauses of beautiful Christian music. Tonight however I thought it would be nice to take a break and present this short video describing the Jewish holiday of Hanukkah. This year Hanukkah begins on Christmas, December 25, and runs through January 2, 2025, so I am a little early, but that’s all right.

Like almost all Jewish holidays, part of Hanukkah’s purpose is to celebrate a victory over oppression. In this case it celebrates the revolt of the Maccabees against the Greek effort to obliterate the Jews. Or as Jews like to joke about all Jewish holidays, “They tried to kill us. We won. Let’s eat!”

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Aaron Copland – “The Promise of Living” from The Tender Land

6:01 pm

An evening pause: I posted this for Thanksgiving in 2012 and 2015. Time to post again. As I wrote in 2015:

The hope of America will always live on, even when America is gone. Ordinary people want freedom, love, family, and the right to live their lives as they wish, without harming others, so they can bring in “the blessings of harvest,” whatever that harvest might be. It must be our goal to allow that to happen, and to stop those that wish to prevent it.

The promise of living
With hope and thanksgiving,,,

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Engineers restore Voyager-1 after communications issue

9:20 am

The Voyager missions
The routes the Voyager spacecraft have
taken since launch.

Engineers have now manged to resume normal communications with the Voyager-1 interplanetary probe after it had shut down its main communications channel last month due to low power levels.

Earlier this month, the team reactivated the X-band transmitter and then resumed collecting data the week of Nov. 18 from the four operating science instruments. Now engineers are completing a few remaining tasks to return Voyager 1 to the state it was in before the issue arose, such as resetting the system that synchronizes its three onboard computers.

The X-band transmitter had been shut off by the spacecraft’s fault protection system when engineers activated a heater on the spacecraft. Historically, if the fault protection system sensed that the probe had too little power available, it would automatically turn off systems not essential for keeping the spacecraft flying in order to keep power flowing to the critical systems. But the probes have already turned off all nonessential systems except for the science instruments. So the fault protection system turned off the X-band transmitter and turned on the S-band transmitter, which uses less power.

The S-band transmitter had not been used since 1981, so it took awhile for ground engineers to find the very weak signal. Once found however it was possible to recover operations, though those operations will likely continue for only another year or two. The spacecraft’s power supply is expected to finally run out sometime in ’26 or ’27.

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