One of Everything: The Breakthrough Listen Exotica Catalog

We present Breakthrough Listen’s Exotica Catalog as the centerpiece of our efforts to expand the diversity of targets surveyed in the Search for Extraterrestrial Intelligence (SETI). As motivation, we introduce the concept of survey breadth, the diversity of objects observed during a program. Several reasons for pursuing a broad program are given, including increasing the chance of a positive result in SETI, commensal astrophysics, and characterizing systematics. The Exotica Catalog is a 963 entry collection of 816 distinct targets intended to include “one of everything” in astronomy. It contains four samples: the Prototype sample, with an archetype of every known major type of nontransient celestial object; the Superlative sample of objects, with the most extreme properties; the Anomaly sample of enigmatic targets that are in some way unexplained; and the Control sample, with sources not expected to produce positive results. As far as we are aware, this is the first object list in recent times with the purpose of spanning the breadth of astrophysics. We share it with the community in hopes that it can guide treasury surveys and as a general reference work. Accompanying the catalog is an extensive discussion of the classification of objects and a new classification system for anomalies. Extensive notes on the objects in the catalog are available online. We discuss how we intend to proceed with observations in the catalog, contrast it with our extant Exotica efforts, and suggest how similar tactics may be applied to other programs.

Dyson swarms of von Neumann probes: prospects and predictions

According to the Kardashev scale, possible Type-II and above civilizations could use energy sources of the universe in different ways. Self-replicator von Neumann probes believed to invade any galaxies in various studies could also have uses for gaining energy, in which Dyson swarm structures are likely to consist of probes that could emit energy from any luminous celestial object is to be considered first. On addressing some possible dynamical properties of probes, the study has examined in which size and populations they could enfold a star and how they could have observational evidences according to relevant star's energy output. On the basis of our solar system, it has also been shown using a weighted-directed network structure what kind of population and route they could have in case of spreading to the nearest-neighbouring stars.

Celestial objects periphrastic naming and synonym correlation

We consider the ability of language to express identical content by periphrastic means that reflects in the periphrase and synonym ratio. We prove that in the narrow sense periphrastic names cannot be considered as a simple synonymous replacement of the word-nominee, since the meaning of the periphrase is not identical with the meaning of the word-nominee. Periphrasis is more voluminous, wider in its content due to the presence of certain structural components or the presence of associative features. These features focus attention of the linguistic personality and allow allocating a specific descriptive feature in the periphrasis image. In a broad sense periphrases and synonyms are considered as stylistic synonyms. Meanwhile in language there are non-stylistic periphrases for celestial object. Opportunity of duplicate use of the words “moon” and “month” shows semantic opposition. As exemplified in the names of celestial bodies there is tendency of periphrasis and synonym, but not the rules. According to the narrow and broad understanding of periphrasis and synonyms, which relies on the representative function of language, it is necessary to take into account the cognitive factors that determine the relationship between the nominating word (periphrasisable concept) and the periphrasing concept.

Harmoni dan Narasi Kosmos

For all his life Johannes Kepler seeking for harmony. Kepler is best known for his laws of planetary movement. He is also a polymath working in the intersection between contemporary sciences such as astronomy, math, physics, optics, astrology, music theory, meteorology dan history. After spending years exploring those different disciplines, he later learned he was actually longing for the harmony. His fascination over harmony in nature kept growing up, in his last days Kepler was still trying to finish a book he started since he was still a scholar. This book is called Somnium. Somnium itself is the Latin word for 'dream,' a word that make sense if you read the whole chapter. The main idea for this project is Kepler’s fascination over the harmony in celestial object, thus he tried to convince people that Copernicus heliocentrism is the absolute truest way to understand how our solar system works. The idea of making narative came up to Kepler’s mind as he turned his research into a fiction, a story about a boy who makes his journey to the moon to help his mother for being accused of being a witch. Similiarly to the boy, Kepler’s mother is also accused for witchcraft. So Somnium was not really just a scientific book but in some part of them, there is also some biographical facts and fiction. By knowing the pattern in nature we can understand that the nature is in order and there is a grand design hidden in layers. Just like Kepler that are fascinated by the order of nature, 'Somnium' in this work is also talks about the pattern and harmony the curiousity for nature that represented in geometrical objet and natural study, and also about the old knowledge where science, art and spirituality is learnt through one form knowledge