The Louvre in Paris is visited by millions of people each year to see Leonardo da Vinci's masterpiece, theMonaLisa. The painting has an aura of mystery. Leonardo used a technique called sfumato, which is a complex technique in which soft outlines emerge from many delicate layers of paint. Scientists showed in 2010 that some of the layers are ten times thinner than a human hair.
Vision is considered to be the most powerful of the human's primary senses. This is the main reason why a single image can be so powerful. The pillars of creation are beautiful and awe-inspiring, but what we see is basically made of numbers rather than sheer sheens of paint. Astronomers use data from the sky to teach us about the universe, and the visual parts of these heavenly vistas are only a small part of it.
A recent study shows that a sunlike star is in close proximity to a black hole. The star emitted light just before the fall of the Roman Empire because it was locked in a twirling dance. It's the closest black hole ever found, and it suggests a large population of similar dark objects in the Milky Way. No one has been able to see the black hole directly. It will be an unseen companion for a long time. The partner star's periodic motion was revealed by the astronomer's analysis of exquisitely precise data from the Gaia satellite. Unlike the James Webb and Hubble space telescopes, each equipped with multiple sophisticated cameras, Gaia produces pure numerical data. Astronomers use mathematical models to describe reality, despite the silent, invisible numbers.
The modern world is not the only one affected. The discovery of Neptune was based on predictions made a year earlier by the French astronomer. It was noted by Le Verrier that the planet Uranus was perturbed by a mysterious mass and that it should be seen in the sky. He saw Neptune moving against the background stars when he pointed his telescope there. The solar system had become a whole new place.
Images remain the most popular form of publicizing scientific discovery. Data is sacrosanct in the church of science, but images are the true believers. The first detection of gravitational waves was announced in February 2016 and the first image of a black hole was released in April 2019. Both of the breakthrough happened at the same time and were revolutionary. The former produced a lot of data and was awarded a prize, while the latter made a lot of data. Even after accounting for a higher background of Internet searches for black holes, the image of the black hole generated seven times more internet traffic than the detection of ripples in the waves.
There is something special about the images of the stars. Both the public and scientists have different goals. Even a single dot on a telescope's camera can reveal the star's intrinsic luminosity and its temperature. It is possible to inspire contemplative awe about our place in the universe by viewing a panorama of a majestic galaxy. Astronomers can use such images to measure a galaxy's fundamental properties, such as its size and spin, as well as more subtle things like the distribution of its stars.
The reality of our world is described by both visual and non visual data. A mathematical model is needed to narrate reality. There is a theory of gravitation that underpins the data that represents the stars and black holes. If not for Einstein's general theory of relativity, the interferometric data that led to the detection of waves wouldn't beintelligible.
In his influential essay "What Is It Like to be a Bat?", the American philosopher Thomas Nagel argues that lightning has an objective character that is not exhausted by its visual appearance, and this can be investigated by a Martian without vision. It has a more objective character than is shown in its appearance. "Emphasis in original" There is a mathematical model of the field and the appearance of lightning.
Scientists use models to understand reality. A graph with a meandering curve that is proof of a wave rippling through a detector can be as exciting as seeing a movie about the merger of two black holes.
What is the role of astronomy in communication with the public? It is to show the beauty of our universe and make it understandable to everyone. Explaining the intricacies of scientific studies is one of the things this enterprise needs to do. The beauty of a space photo rests on complex mathematics, just as a clock is effective in measuring time because of its clockwork. There is a charm to the numbers that are hidden.
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