Thebe is one of the moons of Jupiter. It is classified as a irregular satellite and is part of the group known as the Himalia group, which consists of several small, irregularly shaped moons that share similar orbits. Thebe was discovered in 1980 by the Voyager 1 spacecraft team, and it is named after a figure from Greek mythology. Thebe has an irregular shape and measures approximately 100 kilometers (about 62 miles) in diameter.
Hippocamp is a small moon of the planet Neptune. It was discovered in 2013 using data from the Hubble Space Telescope. Hippocamp is one of Neptune's lesser-known moons and is particularly interesting due to its unique characteristics. Hippocamp is about 34 kilometers (21 miles) in diameter and orbits Neptune at a distance of approximately 105,000 kilometers (about 65,000 miles).
The 46th meridian west is a line of longitude that is 46 degrees west of the Prime Meridian. It runs from the North Pole to the South Pole, passing through various countries and regions. In North America, it traverses parts of Canada and the eastern United States. In South America, it crosses countries like Brazil and touches the Atlantic Ocean.
The 45th meridian east is an imaginary line of longitude that is located 45 degrees east of the Prime Meridian, which is designated as 0 degrees longitude. This meridian runs from the North Pole to the South Pole, passing through several countries and regions along its path. In the northern hemisphere, the 45th meridian east crosses through parts of Russia, Kazakhstan, and several other countries.
Skoll is a moon of the planet Saturn. It is one of the many moons that orbit Saturn and is classified as a member of the Norse group of moons. Skoll is known for its irregular shape and is relatively small compared to some of Saturn's larger moons. It was discovered in the early 2000s and was named after a wolf from Norse mythology, specifically one that chases the sun.
There's a billion simple looking expressions which are not known to be transcendental numbers or not. It's cute simple to state but hard to prove at its best.
Open as of 2020:
Bibliography:
- www.quantamagazine.org/recounting-the-history-of-maths-transcendental-numbers-20230627/ How Math Achieved Transcendence by David S. Richeson (2023).
12-inch adjustable wrench.
Bought: 2020-11-07 initially for using with park Tool BBT-22.
Ciro Santilli's hardware 2019-12 Bikehut bicycle repair stand by 
Ciro Santilli 40 Updated 2025-07-16
Ciro Santilli 40 Updated 2025-07-16Maybe I'm an idiot and should have bought a much smaller rear wheel stand, only thought of that later, e.g.: www.amazon.co.uk/dp/B00G7ZO3GE or www.amazon.co.uk/dp/B00SD7NL44
Rope attached to rear rack + door knob: www.youtube.com/watch?v=teUsJt1WL1g
2026-02: www.amazon.co.uk/dp/B0FCWSVXM8 "DCA Cordless Drill Set, 40 N.m Torque, 10mm Keyless Chuck, Electric Power Drill with 2.0Ah Battery and Charger,18+1 Position,35-Piece 20V Drill Driver Kit, ADJZ2035". Finally had to buy a drill set for some bloody Ikea furniture that needed drilling. OMG. Then it didn't have the necessary 7,00 mm wood drill bit, they were not documented by seller, but I bought one from Bosch and it was compatible and I managed to put up the bloody Ikea. Drill bit sizes:The included screw bits are:
- Torx: T10, T15, T20, T25, T27, T30
- Philips: PH1, PH2, PH3
- Flat: S5, S6
- Hex: H4, H5
- PZ1, PZ2
2020-01 www.amazon.co.uk/dp/B07D318N7Z BOENFU 12Pcs iPhone Repair Tool Kit Mobile Phone Screwdriver Set with LCD Opening Pliers Cell Phone LCD Screen Opener Suction Opening Pry Tool Kit for iPhone X/5s/6s/6plus iPad Air iPod Samsung Galaxy
2020-01 "Heat Gun, SEEKONE Professional 2000W 50℃- 600℃ Variable Temperature Control Hot Air Gun Kit with 2 Temperature Modes 7 Accessories for D" www.amazon.com/dp/B078S5QMFG Initially for for cell phone repair, but later learnt they are also useful for heat shrink.
2020-11 BOA 13-2612 Strap Wrench, 6-Inch Capacity 8-Inch Long Lever www.amazon.com/dp/B00096JDKS Official: www.boatoolcorp.com/our-products/boa-constrictor-range/boa-constrictor/
2019-09 "Draper Redline 68001 160 mm Heavy Duty Pliers Set with Soft Grip Handles (3-Piece)" web.archive.org/web/20190903191215/https://www.amazon.co.uk/dp/B071JL6LLL (archive)
2019-08: www.amazon.co.uk/dp/B000LFRYG2 (archive) "Silverline SP1236 Combination Spanner, 8-19 mm - 12 Pieces" 8.48 pounds. Because I needed the 15mm for bike pedal, and the price of 1 and the full set were very close.
6 10/11/12/13/14/17 mm Combination Wrench Set WRENCH SET COMBINATION Open-Ended Spanner/Ring Spanner Set www.amazon.co.uk/dp/B07BZLVGX8 (archive) But they sent one wrong, 8 instead of 11. Chrome Vanadium Steel. Markings: "DROP FORGED A". Quality feels crappy, not very smooth.
2017: Teng 621011 Double Open Ended Spanner 10x11mm www.amazon.co.uk/dp/B0001P0VP8 (archive)
2017: Magnusson AMS49 5M TAPE MEASURE 5m retractable flexible rule. www.screwfix.com/p/magnusson-ams49-5m-tape-measure/5315v (archive)
Ciro Santilli's hardware ELEGOO Upgraded Electronics Fun Kit by Ciro Santilli 40 Updated 2025-07-27
Ciro Santilli 40 Updated 2025-07-272022-10 ELEGOO Upgraded Electronics Fun Kit www.elegoo.com/products/elegoo-electronics-fun-kits-4-versions Manuals:
- Elegoo Breadboard power supply module MB‐V2:TODO center positive or center negative?Does not come with AC adapter, getting this one: www.amazon.co.uk/dp/B08ZN476FW output: DC 9V 1A Power Supply Adapter, Plug 5.5mm x 2.1mm, Center Positive,B rand: Security-01, input: AC 100-240V 50/60 Hz, Cable length: 1.8mParts list from the ZIP:
- resistors:
- 1n4007 General Purpose Rectifier
- 22pf 104 Ceramic Capacitor
- 4N35 optocoupler
- 74HC595 8-bit serial-in, serial or parallel-out shift register with output latches; 3-state
- Active buzzer
- Buttons
- CDS-55 Photoresistor
- Electrolytic Capacitor
- Focusens MF52D 103f 3950 thermistor. Beta value 25/50 Celcius: 3950. R_25: I measured 9.61 k Ohms. The number 103 they document as:These descriptions are weird, but ChatGPT has the theory that the first two digits are actual values, and the last is multiplier, so which makes 10k.
but I have no idea how that maps to 10 k Ohms. - PN2222 General Purpose Transistor
- Passive buzzer
- 3386p Bourns Precision Potentiometer - 1 103T: from 0 to 10k Ohms, measured with multimeter. According to the manual the "103" mean 10 k oms, which is consistent with our measurement. "P 103" is etched into the part.
- LEDs:
Arity is a concept that refers to the number of arguments or operands that a function or operation takes. It's commonly used in mathematics and programming to describe how many inputs a function requires to produce an output. For example: - A function with an arity of 0 takes no arguments (often referred to as a constant function). - A function with an arity of 1 takes one argument (e.g., a unary function).
Ciro Santilli's hardware Panasonic NN-SF464M microwave (2017) by Ciro Santilli 40 Updated 2025-07-16
Ciro Santilli 40 Updated 2025-07-16Bought: 2017-09
Impossible to open to properly clean.
Physical phenomena refer to observable events or occurrences in the natural world that are governed by the laws of physics. These phenomena can be categorized into various types based on their characteristics and the physical principles that describe them. Examples of physical phenomena include: 1. **Motion**: The movement of objects, including concepts like velocity, acceleration, and momentum. 2. **Forces**: Interactions that cause changes in motion, such as gravitational, electromagnetic, and nuclear forces.
Classical probability density refers to a function that describes the likelihood of a continuous random variable taking on a specific value within a given range. It is a key concept in the field of probability and statistics, particularly in the context of continuous probability distributions. Here are some key points about classical probability density: 1. **Probability Density Function (PDF)**: The probability density function is the mathematical function that defines the probability density.
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 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. 
- 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