How could an object brighter than the planet Venus not be recorded by
astronomers in Britain or Western Europe? In the year 1054, before
telescopes, a supernova was visible to the naked eye in daylight for
at least three weeks, and for nearly two years after that in the
night sky.
The supernova was
reported by astronomers in China, Japan and the Arabic speaking
world. Astronomers in these parts of the world were far more advanced
in astronomical knowledge than their European counterparts, but that
doesn't explain why something easily seen was not recorded in Western
countries.
So, what was going
on? It would be wrong to believe that the supernova was not seen in
Europe, because clearly, it was. The answer probably lies with the
people holding the power. Monks had astronomical knowledge and the
wherewithal to record the event. Monasteries were the seat of
knowledge and power in Europe at this time and had sufficient control
to decide what became news – and what did not. Did the monks
suppress reports of this spectacular occurrence, and if so, why?
It was on July 4th
1054 that a star in the constellation of Taurus the Bull destroyed
itself in what astronomers call a supernova. The remnants of this
star are now known as the Crab Nebula. This was a spectacular and
rare event: the last bright supernova we are aware of was in 1604.
In 1843 the Earl of
Rosse named the Crab Nebula, observing it through a 36-inch telescope
from his observatory at Birr Castle, Ireland. He clearly had some
imagination because it is not easy to see the image of a crab in the
nebula. Today, astronomers can see the remains of the destroyed star
at a distance of around 6,500 light years.
The nebula is also
known as M1, or Messier 1. This name comes from a catalogue of
objects drawn up by the 18th century French astronomer Charles
Messier. He spent his time searching for comets, discovering around a
dozen, none of them very spectacular. During his search he came
across over a hundred 'comet lookalikes'. To avoid confusion in
future searches for comets, he drew up a list of 'non-comet objects'.
This 'Messier list' is still of great use to astronomers as they
explore and study the constellations.
At the time of
the1054 supernova, monasteries were the seats of learning, with
massive libraries and people who could read and write. They had
already become very wealthy institutions. This was not a deliberate
policy as they were built originally for purely religious studies,
but they had many bequests of land and money left to them by rich
lords and barons.
Monasteries studied
many subjects in addition to religion, astronomy among them. The
monks followed the teaching and ideas of Aristotle (384 BCE- 322BCE)
from ancient Greece. One of his ideas would cause trouble for over
1800 years.
Aristotle developed
the 'geocentric' view of the solar system, where the Earth was
accepted as the centre of everything, with the Sun, Moon and planets
orbiting around it. This geocentric view would only be changed in
1543 by Nicolas Copernicus, a Polish monk. His theory placed the Sun
at the centre to give us the 'heliocentric' view. Although not
everything Copernicus said was correct, he made massive strides in
the right direction.
Aristotle also said
that everything in space moved in circles. The circle was seen as a
'perfect' shape, and the heavens, of course, had to be perfect. We
now know objects in the solar system move in ellipses rather than
circles.
Aristotle’s idea
that the heavens were perfect and unchanging caused trouble with both
the 1054 supernova and that of 1181. When people saw the new star
appear they went to the monasteries because they were the centres of
learning, and the monks would know what was going on. At least that
is what people thought.
To the monks,
however, the supernova posed an irreconcilable problem. They could
not admit that there was a new star. They had told everyone that the
heavens were perfect and unchanging. Consequently, people living
close to the monasteries were convinced, by the monks, that there was
nothing there. Although they could see this new star, the monks had
such authority that the people believed them when they were told that
this was the work of the devil, trying to corrupt their minds.
Today, this is the
prevailing theory as to why an event recorded in many parts of the
world was ignored in Europe. It simply did not fit in with the
accepted view of the most learned people; the monks in the
monasteries, and thus power came to define knowledge.
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