Atmospheric ghost lights, often referred to as "ghost lights" or "will-o'-the-wisps," are mysterious lights seen in certain geographical areas, typically at night or in low-light conditions. These lights can appear as glowing orbs, flickering flames, or steady points of light and are often associated with rural or marshy environments. The phenomenon has a rich history in folklore, with various cultures attributing the light to spirits, fairies, or other supernatural entities.
Alpenglow refers to the phenomenon where mountains, typically at sunset or sunrise, are bathed in a warm, reddish or pinkish light. This effect occurs when the sun is just below the horizon, casting its rays onto the mountains. The light interacts with the atmosphere and the snow or rocky surfaces of the mountains, creating a beautiful visual display. Alpenglow is often most pronounced on the peaks and ridges, where the sunlight has a more direct angle.
Aurorasaurus is a citizen science project and online platform that allows individuals to report and track auroras, or the Northern and Southern Lights. Launched in 2014, Aurorasaurus aims to gather real-time data on auroral events by collecting reports from amateur astronomers, photographers, and the general public. Users can share their experiences and photographs of auroras, which are then mapped and made available to researchers and the public.
Crepuscular rays, also known as "God rays" or "sunbeams," are streams of sunlight that appear to radiate from the sky, typically seen during dawn or dusk when the sun is just below the horizon or partially obscured by clouds or other atmospheric conditions. These rays occur due to the scattering of light by particles in the atmosphere, such as dust, water vapor, or clouds.
"Dewbow" typically refers to a slang term used in certain communities, particularly in hip-hop culture, to describe an individual who may be perceived as "lame," "unfashionable," or "uncool." The term can also imply that someone is trying too hard to fit in or be trendy but is failing to do so. It can be used both lightheartedly among friends or as a more derogatory term in other contexts.
A keogram is a type of visual representation used primarily in the field of atmospheric science, particularly in the study of auroras and other phenomena related to the Earth's magnetosphere. It is a 2D image that captures the brightness or intensity of a specific phenomenon over time. In a keogram, time is represented on one axis (usually the horizontal axis), while the vertical axis represents a specific spatial dimension — often the zenith angle or latitude of the observation site.
A Lowitz arc refers to a specific type of arc in the context of singularities in mathematical functions or curves. More particularly, it is associated with certain kinds of algebraic varieties and homological properties in algebraic geometry. In the context of algebraic curves, a Lowitz arc is defined as a formal object that generalizes the notion of a point in algebraic geometry, allowing the study of families of points or infinite branches within a curve or surface.
The term "mirage" can refer to a few different concepts depending on the context: 1. **Optical Illusion**: In the most common sense, a mirage is an optical phenomenon that occurs when layers of air at different temperatures create a distortion in the way light travels. This often results in the appearance of water or a reflection of the sky on a hot road or desert surface. The light refracts due to temperature gradients and creates an image of something that isn't actually there.
The Parry arc, named after the geologist John Parry, refers to a specific feature in the context of glaciology and snow dynamics. It is a type of snow accumulation pattern that occurs on the leeward side (the side away from the wind) of an obstruction, such as a mountain or a ridge. When wind blows snow, it can create depositional areas where snow collects and builds up due to the reduction of wind speed and turbulence in the sheltered area.
Sun glitter refers to the sparkling effect created by sunlight reflecting off the surface of water, particularly when there are small waves or ripples. This phenomenon occurs when sunlight hits the water at certain angles, causing small points of light to dance across the surface. The visual effect can appear particularly striking on calm days or during sunset, when the light is less harsh and more diffuse.
A "tangent arc" typically refers to a portion of a curve or arc that is tangent to a line or another curve at a specific point. In geometry and mathematics, the concept of tangents is important in various contexts. 1. **Geometric Context**: In a geometric figure, a tangent arc would be a section of a circle or any curvilinear shape that touches a straight line (the tangent) at exactly one point.
A double sunset refers to a phenomenon where two sunsets can be observed in quick succession. This typically occurs in areas with unique geographical features, such as high mountains or deep valleys, where the sun can dip below the horizon at different heights or angles, allowing observers to see the sun set multiple times from varying perspectives. Double sunsets are sometimes seen in places like the Écrins National Park in France or in certain regions of the Arctic, where the landscape allows for this unusual optical effect.
Frazil ice is a type of ice that forms in water under specific conditions, typically in cold environments. It consists of small, loose crystals that form in supercooled water, usually in rivers and oceans, when the temperature of the water is below freezing but the water itself remains in a liquid state. Frazil ice typically forms when turbulent water is cooled rapidly, causing tiny ice crystals to develop and remain suspended in the water.
The Okorokov effect is a phenomenon observed in certain physical systems, particularly in the study of fluids and fluid mechanics. However, it appears that you might be referring to a specialized or niche term that is not widely recognized or established in the existing literature or scientific community as of my last update in October 2023. If "Okorokov effect" refers to a specific concept or phenomenon in a particular field (such as physics, materials science, etc.
Polar night refers to a phenomenon that occurs in polar regions, where the sun does not rise above the horizon for an extended period, typically occurring during the winter months. This period of complete darkness can last for several weeks to several months, depending on the latitude. In places located above the Arctic Circle (66.5° N latitude) in the Northern Hemisphere or below the Antarctic Circle (66.
STEVE can refer to several different things depending on the context. Here are a few possibilities: 1. **STEVE (Super Tranquil Exosphere-Exoplanet Voyager Explorer)**: This is an acronym used in the context of space exploration or astronomy, though the exact meaning may vary based on specific discussions. 2. **STEVE (Satellite Tracking of Equatorial Vortices)**: This may refer to scientific projects or initiatives related to weather patterns and atmospheric studies.
Sky brightness refers to the amount of light emitted or scattered in the atmosphere that contributes to the illumination of the night sky. It is an important factor in astronomy and outdoor activities, as it can significantly affect visibility and the ability to observe celestial objects. Sky brightness can be influenced by several factors: 1. **Natural Light Sources**: This includes light from the moon, stars, and other celestial bodies. The brightness of the moon during different phases can dramatically change the overall illumination of the night sky.
The term "Globe effect" may refer to different concepts depending on the context, but it doesn't have a widely recognized or specific definition in scientific literature or common discourse. Here are a few possibilities it could relate to: 1. **Globalization Effect**: In discussions of economics or sociology, the "globe effect" might refer to the impact of globalization on cultures, economies, and societies around the world. This includes how local practices are influenced by global trends, trade, and communication.
A charged particle is an individual particle that possesses an electric charge. This charge can either be positive or negative. Charged particles are fundamental to various physical phenomena and play critical roles in electricity, magnetism, and various fields such as chemistry and particle physics. ### Types of Charged Particles: 1. **Electrons**: Negatively charged particles that orbit the nucleus of an atom. 2. **Protons**: Positively charged particles found in the nucleus of an atom.
The term "dawn chorus" commonly refers to the natural phenomenon observed in the early morning, particularly at sunrise, when various bird species sing collectively as they begin their day. However, in the context of electromagnetic phenomena, "dawn chorus" refers to a specific type of electromagnetic wave activity that occurs in Earth's magnetosphere. The electromagnetic dawn chorus is characterized by a series of rising and falling frequency sounds produced by plasma waves in the Earth's magnetosphere.
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!
Intro to OurBigBook
. Source. We have two killer features:
- 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-calculusArticles 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/derivativeVideo 2. OurBigBook Web topics demo. Source. - 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.
- to OurBigBook.com to get awesome multi-user features like topics and likes
- as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
Figure 2. You can publish local OurBigBook lightweight markup files to either OurBigBook.com or as a static website.Figure 3. Visual Studio Code extension installation.Figure 5. . 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. - Infinitely deep tables of contents:
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