HD 139139 is a star located in the constellation of Centaurus, approximately 60 light-years away from Earth. It is a solar-type star, similar in characteristics to our Sun, and is often of interest for studies involving stellar properties, exoplanet research, and astrobiology. In addition to its basic stellar characteristics, HD 139139 has also gained attention due to the discovery of one or more exoplanets in its orbit.
Tabby's Star, officially known as KIC 8462852, is a star located in the constellation Cygnus. It gained significant attention due to its unusual light fluctuations, which were first noted by the Kepler Space Telescope. These fluctuations are characterized by irregular and significant dips in brightness, which have led to various hypotheses about their cause.
The Bullet Cluster (1E 0657-56) is a well-known astronomical object formed by the collision of two galaxy clusters. It is located approximately 3.8 billion light-years away from Earth in the constellation Carina. The Bullet Cluster is particularly significant in astrophysics for several reasons: 1. **Collision of Galaxy Clusters**: The Bullet Cluster is one of the best examples of a merger between two large galaxy clusters.
Direct detection of dark matter refers to experimental efforts aimed at observing dark matter particles through their interactions with normal matter. Dark matter is believed to make up about 27% of the universe's mass-energy content, yet it does not emit, absorb, or reflect light, making it invisible and detectable only through its gravitational effects. Direct detection experiments primarily focus on identifying weakly interacting massive particles (WIMPs), which are among the leading candidates for dark matter.
The Halo Mass Function (HMF) describes the number density of dark matter halos as a function of their mass at a given epoch in the universe. It provides a statistical framework for understanding how many halos exist within a certain mass range per unit volume in the universe. The HMF is a crucial tool in cosmology and astrophysics for studies related to galaxy formation and evolution, large-scale structure, and the distribution of dark matter.
The term "graceful exit problem" typically refers to several contexts, but it is prominently associated with computer science, particularly with distributed systems and networking. Here are a couple of interpretations: 1. **Distributed Systems**: In the context of distributed systems, the graceful exit problem deals with the challenge of nodes (or processes) terminating their operation without disrupting the overall system's performance or integrity.
Neutralino is a lightweight framework for building cross-platform desktop applications using web technologies such as HTML, CSS, and JavaScript. It enables developers to create applications that can run on multiple operating systems, including Windows, macOS, and Linux, without needing to learn platform-specific programming languages or frameworks. Neutralino provides a simple API that allows developers to integrate features commonly found in desktop applications, such as file handling, system notifications, and more, while leveraging the ease of web development.
Marc Kamionkowski is a prominent astrophysicist known for his work in cosmology, particularly in the fields of cosmic microwave background radiation, dark energy, and structure formation in the universe. He has made significant contributions to our understanding of the early universe and the large-scale structure of the cosmos, often utilizing theoretical models and simulations to explore these topics. Kamionkowski has been involved in various research projects and collaborations, and he may also be associated with teaching at the university level.
The Trans-Planckian problem arises in the context of cosmology, particularly in the study of the early universe and the inflationary phase. It is related to the behavior of quantum fields at scales smaller than the Planck length, which is approximately \(1.6 \times 10^{-35}\) meters.
Piezochromism is a phenomenon in which the color of a material changes in response to applied mechanical stress or pressure. This effect is often observed in certain organic compounds, inorganic materials, and polymers. The color change can result from alterations in the molecular structure, electronic states, or the arrangement of the materials under stress. The mechanisms behind piezochromism can vary.
Thermochromism is the phenomenon in which a material changes color in response to changes in temperature. This color change occurs due to alterations in the physical or chemical properties of the material, often involving phase transitions, changes in molecular structure, or modifications in electronic configurations.
Tribochromism is a phenomenon where a material changes color in response to mechanical stress or friction. This can occur due to various mechanisms, such as changes in molecular structure, the alignment of chromophoric groups, or alterations in the electronic properties of the material when it is subjected to pressure or movement.
The Wilson–Bappu effect is an astronomical phenomenon observed in the field of stellar spectroscopy, particularly concerning the stars designated as Cepheid variables. It describes a correlation between the period of pulsation of Cepheid variables and their mean luminosity (brightness). Essentially, this means that the longer the period of pulsation of a Cepheid variable star, the more luminous it is. This relationship is crucial for distance measurement in astronomy.
Satire is a genre of literature, film, and other arts that uses humor, irony, exaggeration, or ridicule to criticize or mock individuals, institutions, societal norms, or behaviors. Different mediums can enhance or alter how satire is expressed and received. Here’s a breakdown of satire by medium: 1. **Literature**: Books, essays, and poetry have long been traditional forms of satire.
As of my last update in October 2023, "Awaze Tribune" does not appear to be a widely recognized term or entity. It could possibly refer to a news outlet, social media platform, or a community forum, but specific information on it is not readily available.
"Craposyncrasies" does not appear to be a widely recognized term in literature, science, or any other common field of study. It might be a typographical error or a mix of two different words. If you meant "idiosyncrasies," that refers to peculiar or individual characteristics or behaviors.
"Dog Poop Girl" refers to a 2005 incident in South Korea that gained notoriety and became a meme in internet culture. The situation involved a young woman who was seen in a video allowing her dog to defecate in a public area without cleaning it up. When confronted about it, she reportedly reacted defensively and dismissively. The incident sparked widespread outrage, leading to online discussions about responsibility and public behavior.
The term "grotesque body" is often used in various fields, including art, literature, and cultural studies, to describe a body or form that deviates from the norms of beauty, harmony, or conventional representation. It is characterized by exaggeration, distortion, and a blending of different elements that may evoke both fascination and repulsion. In art and literature, the grotesque body can represent themes such as excess, abnormality, or the clash between the human and the monstrous.

Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 2.
    You can publish local OurBigBook lightweight markup files to either https://OurBigBook.com or as a static website
    .
    Figure 3.
    Visual Studio Code extension installation
    .
    Figure 4.
    Visual Studio Code extension tree navigation
    .
    Figure 5.
    Web editor
    . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
    Video 4.
    OurBigBook Visual Studio Code extension editing and navigation demo
    . Source.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact