Ancient Egyptian Astronomy

The Ancient Egyptians cared a great deal about astronomy. Probably too much, in fact. According to their beliefs, the movements of the planets and stars played a role in the annual flooding of the Nile river, and if you are an Ancient Egyptian, you will do just about anything to appease the Nile, and that includes laboriously tabulating star positions for millennia.

Astronomically inspired stone circle at Nabta Playa from the fifth millennium BCE.

Beyond simply recording positions, the Ancient Egyptians also devised methods to be able to predict the behaviour of astronomical objects in the future, and even to use stars to tell the time of day. One of these time-keeping methods functioned through the use of a “star clock”. To use a star clock, one needed two people. One person to sit facing North, and another to sit facing them. As the night passed the recorder would mark when certain stars passed behind the body of the other. The information gathered from this could then be used to find an entry in a table which gave the correct time.

Astronomy even came to have a religious significance. The tombs of various pharaohs feature many artifacts and murals depicting the movements of the stars and charts representing their positions. It is theorized that knowledge of these stars would benefit the pharaohs in navigating the realm of the afterlife.

A star chart from an 18th dynasty tomb. The small, repeated figures on the borders that resemble stars represent stars.

Another star chart from the tomb of Ramses VI, featuring Nut, the Egyptian goddess of the sky, in the top left corner.

Probing the Mysteries of 50000 QUAOAR

Hundreds of millions of miles beyond the orbit of Neptune lurks one of the most intriguing objects in the Solar System, 50000 Quaoar.

50000 Quaoar is notable for multiple reasons, but the most apparent is its name. Quaoar is the name of the creator deity of the Tongva people in the Los Angeles Basin. The deity Quaoar was believed to have control of a group of “avengers” who spied on humanity and enforced Quaoar’s will. While 50000 Quaoar certainly has an impressive namesake, the 50000 portion is also interesting from an astronomical point of view.

Ordinarily, Solar System objects will be named along with a number denoting how many similar objects had been found before. For instance, 1154 Astronomia was the 1154th minor planet found in the solar system. This chart has all of the minor planets found in order. But for a Solar System object as interesting as Quaoar, scientists decided to break entirely with this tradition to give it a number more fitting to its power; thus we have 50,000 Quaoar.

Another interesting fact concerning Quaoar is that it is a cubewano, and despite the fact that WordPress has underlined it in red on my screen, this strange term cubewano is really an English word. It comes from the provisional name of trans-Neptunian object 15760 Albion, 1992 QB1. 1992 QB1 was left unnamed for over two decades, so whenever another trans-Neptunian object was located it was named after this provisional name (if you say QB1 fast enough it begins to sound like cubewano).

Cubewanos are often very large. The largest of them Makemake is actually a dwarf planet, although this isn’t unique to Makemake. 50000 Quaoar may also be a dwarf planet, and it even has its own 50 km moon, Weywot.

Some scientists have hypothesized that 5000 Quaoar was originally much larger and collided with another trans-Neptunian object, possibly even Pluto. Quaoar has also been chosen as a target for a flyby in the 2030s, so get your tickets soon.

Venera, or the Soviets’ many attempts to reach Venus

Despite being the sister planet of Earth, Venus is far from hospitable. Very far. Its atmospheric pressure at the surface is 92 times that of Earth’s, has an average surface temperature of 863 degrees Fahrenheit, and at higher latitudes sulphuric acid rains onto the surface.

So what better force could there be to attempt to reach, land on, and take pictures of Venus than the Soviet Space Program?

As it turns out, a different force would probably have been preferable, because the Soviets did not have an easy time getting to Venus. For reference, here are the results for their first eight attempts:

Failed to leave Earth
Communications lost en route to Venus
Failed to leave Earth
Failed to leave Earth
Third stage exploded
Did not reach Venus
Did not leave Earth
Communications lost en route to Venus

And hey, going 0/8 isn’t so bad, but remember: they have not even managed to reach Venus by this point, so all of that blistering heat and acid rain has not even entered the equation yet.

When the spacecraft actually manage to make it to Venus, things do not go well. For starters, only one of them managed to last over two hours before overheating and becoming crushed by the atmosphere. One lasted a mere 23 minutes. Venera 11 managed to land on the surface, armed with a color camera, but due to a design flaw its lens cover become stuck and no pictures could be taken. The new-and-improved Venera 12 had the exact same issue.

The Photos

Eventually, however, the Venera landers did manage to take some photographs of the surface of Venus, both black-and-white and in color. Here are some of them:

The Aftermath

What happened after the Soviets obtained these images? In fact, they realized that idea of landing on Venus was a little too ambitious, and the next four (and final) missions to Venus were flyby’s.

Since the last Venera landing in 1982, no spacecraft has landed on the surface of Venus. While there are some tenuous plans by the Russian space agency Roscosmos and the Indian Space Research Organization to launch orbiter spacecraft toward Venus in the late 2020s, there are currently no proposed Venus landers.

As such, it is likely that over half of a century will have passed, and our only knowledge of the surface of the planet closest to us will be a handful of dingy photographs taken by ill-fated landers, sent by a country that no longer exists.

Newton and Friends

Look at this man:

This is none other than Sir Isaac Newton (Dec. 25, 1642 – Mar. 20, 1726), who, among other things, laid the foundation for modern mathematics and physics. Of course, Wikipedia has more information than you could ever possibly want to know about this mathematician-physicist-philosopher-alchemist, but this site is shorter and is more focused on his scientific accomplishments.

You might be wondering what else was happening in the world while Isaac was attempting to turn lead into gold and calculating the orbit of Jupiter. Good thing you asked, because I’ve got two killer contemporaneous historical events for you:

Event 1: Qing Control of China

This flag, sporting a pretty rad dragon, represents the Qing, the last imperial dynasty of China. While the dynasty was established in 1636, it didn’t control China proper until 1644, which is, conveniently, two years of Newton was born. The Qing would continue to rule in China, in some capacity, until 1912 thus ending some 2,000 years of imperial rule in China.

Event 2: Coronation of Louis XIV

This is Louis “the Sun King” XIV. He became king of France in 1643, which was after Newton was born. His ascension to the throne was kind of important because he was a fan of absolute monarchism, wherein the monarch holds absolute power and whose authority is granted by God. Mighty suspicious that he thought this, considering he was himself a monarch and all. Absolute monarchy in France was a contributing factor in the French revolution. Enough of Louis XIV and onto the main event.

Historical Person

You guessed it, it’s Leopold I, Holy Roman Emperor. He lived from June 9, 1640 until May 5, 1705, so he was around for most of Newton’s lifetime. Leopold did not like France. At all. In fact, he fought three separate wars with France, the last of which being the War of the Spanish Succession, where Leopold attempted to throw his son until the Spanish throne, getting to fight France as a nice bonus. Over one million people died in this war, and Leopold’s son didn’t even get the Spanish inheritance.

Conclusion

I think it is interesting seeing things completely unrelated to science which were going on at the same time as various scientific developments because these historical events are usually not mentioned when the history of science is being discussed. It was especially interesting seeing what was going in far away from these scientific events.