The 15th meridian west is a line of longitude that is located 15 degrees west of the Prime Meridian, which is at 0 degrees longitude. This meridian runs from the North Pole to the South Pole and passes through several countries in Europe and Africa, including parts of Norway, Sweden, Denmark, and Spain, as well as countries in West Africa. It is one of the meridians used in the geographic coordinate system to help determine locations on Earth.
A synodic day refers to the time it takes for a celestial body, such as a planet, to rotate once on its axis relative to the position of the Sun as seen from that body. In simpler terms, it is the duration between two successive sunrises or sunsets observed on the surface of the planet. For instance, the synodic day on Earth is approximately 24 hours, which is the time it takes for the Earth to complete one full rotation relative to the Sun.
The 162nd meridian east is a line of longitude that is located 162 degrees east of the Prime Meridian, which runs through Greenwich, London. Meridians are used to measure distances east or west of the Prime Meridian. The 162nd meridian east runs from the North Pole to the South Pole.
The 165th meridian east is a line of longitude that is located 165 degrees east of the Prime Meridian, which is at 0 degrees longitude. This meridian runs from the North Pole to the South Pole, passing through various countries and regions. In the Northern Hemisphere, it crosses parts of Russia, including the Kamchatka Peninsula, and can also be seen in the Bering Sea.
The other major university in the Bay Area (and basically in California itself) besides a few University of California places.
The heart of Silicon Valley.
Stanford University Physics Department by 
Ciro Santilli 37 Updated 2025-07-01 +Created 1970-01-01
Ciro Santilli 37 Updated 2025-07-01 +Created 1970-01-01 University of Stanford spinout company by Ciro Santilli 37 Updated 2025-07-01 +Created 1970-01-01
Ciro Santilli 37 Updated 2025-07-01 +Created 1970-01-01The closest site of the University of California to San Francisco. Berkeley, California is a small town on the East of the San Francisco Bay.
University of California Los Angeles by Ciro Santilli 37 Updated 2025-07-01 +Created 1970-01-01
Ciro Santilli 37 Updated 2025-07-01 +Created 1970-01-01 Kavli Institute for Theoretical Physics by Ciro Santilli 37 Updated 2025-07-01 +Created 1970-01-01
Ciro Santilli 37 Updated 2025-07-01 +Created 1970-01-01 University of California, San Diego by Ciro Santilli 37 Updated 2025-07-01 +Created 1970-01-01
Ciro Santilli 37 Updated 2025-07-01 +Created 1970-01-01 Pinned article: ourbigbook/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