All pages

Nine landscape photographs from the Northern California coast and countryside, sequenced warm to cool. Click any frame for the fullscreen viewer; hover to reveal the original color.

Find pages on this domain — titles, paths, blurbs, and keywords. Live filter in the browser.

Running log of what landed on stevenphilley.com — newest first, grouped by day. Updated when the site grows.

Offer page for a static suggestion box with a live Yes / Later / No board. Page Pack $39/yr or Site Care $39/mo — Color It Company.

A calendar built like a clock. Read the whole year as one engraved dial, or switch to a single month with live hands. Click any day to mark it.

A finance terminal. Live crypto prices from CoinGecko with a scrolling ticker, index snapshots, and business headlines pulled from seven feeds.

Three kinds of percentage math in one place — what a percent of a number is, what one number is as a percent of another, and the change between two figures. Results update as you type.

A focus timer with three sessions — pomodoro, short break, long break — each with its own color. Set your own durations, and a chime marks the end of every round.

A quiet typing tutor. Three difficulty levels, a beginner mode that drills the keys you choose, and a pace chart with words per minute and accuracy at the end of every run.

The nine chakras of the tantric subtle body — name, meaning, element, seed sound, and the qualities each governs — with a sticky scroll-spy rail and petal marks drawn to scale.

North Indian Ashtakoota guna milan, 36 points, from birth date, time, and place — or from a Moon nakshatra you already know. Lahiri ayanamsa, in the browser.

Everyday converters hub under /tools/ — tenant issue log, temperature, text, internet speed test. Runs in the browser.

Fahrenheit ↔ Celsius, both ways. Type either side; results update live. Freezing, room, body, and boiling presets.

Browser ping, download, and upload against Cloudflare’s public edge. Approximate — not a lab meter. Not affiliated with Cloudflare or Ookla.

A local log for apartment maintenance and habitability issues — status, priority, work orders, dates, and a dated note on each one. Save and load a text file. Nothing is uploaded. Not legal advice.

Watts to amps, amps to watts, watts to volts, Ohm's law, and power from resistance. Runs in the browser.

Eighteen lessons, then a maker: parts, snapped wires, a nodal solver, a scope, and save or share. In the browser.

Interactive 4-band color decoder. Click the bands or type ohms to snap to a nearby E24 value.

Series resistor for an LED from supply volts, forward voltage, and milliamps. Nearest E24 and resistor power.

Zilog Z80 information hub — history, Z80 Retro! and Chinese modular builds, CP/M, homebrew SBCs, and a curated link directory.

Diode + capacitor peak hold (or ideal precision rectifier); Vhold, ripple ≈ I/(fC), and τ = RC live.

Half-wave, full-wave (center-tap), and bridge; peak Vout, fr, and ripple ΔV ≈ I/(fr C) live.

Shunt zener clamp; Vin, Vz, Rs, and Rload → Vout, Iz, and diode / Rs power live.

Shared library of freely reusable images (public domain, CC0, and CC BY) with hosted copies for stable embeds across Steven’s sites, plus a machine-readable catalog.json.

Steven’s AI image generation portfolio: images and short looping videos he created with Grok Imagine. AI-generated artwork, not photographs.

Desktop wallpapers. A daily image plus Nature, Sci-fi, Swimwear, Fedora, and other collections. Every image is generated with Grok Imagine. Client-side cover-crop downloads — original, common sizes, and custom W×H. Larger sizes are marked Upscale.

If I could do anything — protect the Amazon, clean air and water, wild life, then the closer rings: Campbell, animals, family, making, music, and seeing.

Public quotes from Steven’s Facebook / Color It Game Studio presence — JSON-driven gallery with site themes and share. Only publicly visible lines; never invented.

Family photographs from the Philley albums — kitchen gatherings, portraits, graduation, and older prints.

Campbell-area desk for traffic and safety, education-quality literacy, Pruneyard land history, 1981 Compton / 2026 Campbell compare, earthquake history, liquefaction literacy, groceries in season, and past/present/future starters — including a Science-desk link to Salesforce Tower / Day for Night. Nuts, Dolphin Pet Village, DJ, guitar.

Live US weather by city or ZIP — current conditions and a 10-day forecast. Defaults to Campbell (95008). Open-Meteo, no API key.

Campbell Union ESD first, then county trends — enrollment, how California measured quality, CAASPP/SEDA, gaps. Cited. Not a school ranking.

Orchards to shopping center, Union Avenue 1982–1985 housing, historic lead-arsenate literacy, valley wetland / fill notes. Cited. Test, don’t guess — not a parcel diagnosis.

Sourced compare/contrast: 1981 Compton (LA County) and 2026 Campbell (Santa Clara County). Census, city ACFR, histories. Educational — not a stereotype tour.

USGS-cited essay: what liquefaction is, historic cases, and northern Santa Clara / Campbell scenario maps. Educational — not engineering advice.

Educational timeline of Bay Area quakes with Campbell / South Bay focus — faults, 1838–2014 notables, preparedness literacy. USGS-linked. Not a live alert feed.

Campbell ridiculousness desk — civic soap, water-tower lore, silver ants, Documented vs Lore.

Late-summer / early-fall seasonal grocery notes for Campbell and the South Bay — peak produce, pantry staples, local shopping pointers.

Past, present, and future for Dolphin Pet Village. Empty lanes until the real notes.

Past, present, and future for the DJ hobby. Empty lanes until the real notes.

Past, present, and future for the guitar showcase. Empty lanes until the real notes.

Academic desk for reading cinema — form, history, television, genres, theory, close watching, and glossary. Distinct from the practical /film/ production desk.

Shot size, angle, camera movement, editing rhythm, sound, and mise-en-scène vocabulary.

Film eras and movements from silent cinema through contemporary — traits and canonical titles.

Readable timeline: mechanical TV, Farnsworth and Zworykin, broadcast, postwar boom, color, cable and satellite, digital, streaming.

Audience contracts — western, noir, melodrama, sci-fi, horror, comedy, documentary — conventions and breaks.

Accessible primers: realism vs formalism, auteur, genre theory, spectatorship, feminist film theory, apparatus.

Close-read a scene — pause points, shot-list template, power-in-the-frame questions, sound vs image.

Plain-language definitions for the vocabulary used across the Film Studies desk.

A guided walk through 1900s–2020s — substantial essays on culture, tech, conflict, and everyday life, with imagined painterly art for each era.

Bronze, iron, gold, silicon, information — a lesson on material ages and the rushes that reshaped who travels, who profits, and who gets left out.

Where we stand — nanomaterials, robotics, space — plus doors into astronomy, atmosphere, light pollution, Salesforce Tower, mining, ocean metals, the Standard Model, Gravity, the electromagnetic spectrum, and a nested humanoid-robotics status essay.

An introduction for beginners: the three printers you will actually meet, the plastics they use, and a plain-language comparison table.

How to test a desktop power supply with a multimeter: wire-side pinouts, ATX voltage windows, and a reading checker. Colored plugs only.

Interactive timeline from counting boards to large language models. Pan, zoom, filter, and open a sourced card. Linked to the Z80 desk, the sysop bible, and 3D graphics.

Status essay — pilots, learned whole-body policies, first volume claims. Figure, Atlas, Digit, Optimus. Cited. Company claims can outrun verified deployments.

3D solar-system map with a 2D fallback, day, local-time, and play-speed controls — JPL approximate Keplerian positions, then Moon, libration, eclipses, tides, seasons, precession, analemma, sidereal day, synodic month, retrograde, opposition, Roche, Hill, Venus phases, local sky, stars, exoplanets, and galaxy pages.

Interactive side view: Sun, Earth, and a Moon on a tilted orbit. Solar at new Moon, lunar at full Moon, and a node-offset slider from aligned to about 5°. Umbra, penumbra, and a shadow that misses. Educational schematic, not a prediction.

Top-down Earth with exaggerated ocean bulges. Slide the Moon from new to full: spring when the Sun lines up, neap at a right angle. A light spin shows two highs per turn. Educational schematic, not a tide table.

Top-down Sun, Earth, and Mars on circular orbits. Play the passing: a line of sight and a longitude strip show the backward loop. Prograde, stationary, retrograde. Educational schematic, not an ephemeris.

Top-down Sun, Earth, and Mars on circular orbits. Play one schematic synodic lap: opposition, quadrature, conjunction. Earth in the middle, then a right angle, then Mars lost near the Sun. Educational schematic, not an ephemeris.

Top-down Sun, Venus, and Earth on circular orbits. Play from a schematic inferior conjunction: a Venus disk shows crescent through gibbous, with conjunction and elongation presets. Educational schematic, not an ephemeris.

Mercury and Venus run crescent to full. Mars through Neptune stay gibbous to full. Minimum lit fractions are computed from NASA fact-sheet orbit ratios. Educational schematic, not an ephemeris.

Top-down Sun, Mercury, and Earth on circular orbits. Play from a schematic inferior conjunction: crescent through gibbous, with conjunction and elongation presets. Educational schematic, not an ephemeris.

A superior planet. From Earth the disk stays gibbous to full. Quadrature is the least-lit point, computed from the fact-sheet ratio 1.524. Educational schematic, not an ephemeris.

From Earth the disk stays about 99% lit. Drag an observer outside that wedge and Jupiter can crescent, the spacecraft view. Educational schematic, not an ephemeris.

A superior planet. Minimum lit fraction computed from the fact-sheet ratio 9.573. Gibbous to full from Earth. Educational schematic, not an ephemeris.

A superior planet. Minimum lit fraction computed from the fact-sheet ratio 19.165. Gibbous to full from Earth. Educational schematic, not an ephemeris.

A superior planet. Minimum lit fraction computed from the fact-sheet ratio 30.178. Gibbous to full from Earth. Educational schematic, not an ephemeris.

Astronomical dawn at −18°, nautical at −12°, civil at −6°, and sunrise at the standard −0.833°. NOAA’s solar calculator in the browser, with a 24-hour sky band, a Sun-altitude curve, and a year of day length. Golden hour and blue hour are approximate. Classroom, not an almanac.

Kasten and Young 1989 relative air mass beside plane-parallel sec(z). Extinction in magnitudes is k times airmass, with Krisciunas slopes. Bennett 1982 refraction, 34.5′ at the horizon beside NOAA’s about 34′. Classroom, not a forecast.

Interactive year: Earth on an exaggerated orbit, axis held at about 23.4° and kept parallel. Hemisphere seasons, approximate day length by latitude, and the January perihelion correction. Educational schematic, not an ephemeris or a forecast.

Top-down Sun, a rotating Earth, and a fixed star. One spin against the star is 23.9345 hours; the mean solar day is 24.0000. The stars rise about four minutes earlier. Educational schematic, not an ephemeris.

Top-down Sun, Earth on a short arc, and the Moon. One orbit against the stars is 27.3217 days; new Moon to new Moon is 29.53. The Sun has moved on. Educational schematic, not a phase calendar.

Earth’s axis walks a slow cone. Polaris now; Thuban and Vega as cited schematic stops. Obliquity 23.44°. Tropical year 365.242 days, sidereal year 365.256. About 26,000 years. Educational schematic, not an ephemeris.

Inner circle, outer circle, and the half-ellipse tangent to both. Earth to Mars is 258.88 days and 5.594 km/s from NASA fact-sheet semimajor axes and the Sun’s GM. Phase lead and synodic spacing use the same periods. Around Earth, a classroom low orbit to a computed geosynchronous radius. Educational schematic, not a mission.

r_p = a(1−e) and r_a = a(1+e), and vis-viva speeds at both ends. Earth’s e is 0.0167, so 30.286 km/s and 29.291 km/s. Mercury’s e is 0.2056. Halley’s is 0.967. Sun Fact Sheet GM. Educational schematic, not an ephemeris.

A circular Earth orbit from 160 km to 410,000 km. Period, speed, orbits per day, westward ground track, visible surface, horizon, and light-time round trip. The cited ISS altitude of about 420 km is 92.97 min. Geostationary, from the Earth Fact Sheet, is 35,786.05 km and 23 h 56.07 min. Presets include Hubble, a Starlink 550 km shell, GPS, and the Moon. Simplified two-body model. Not for mission planning.

Speed on a Keplerian ellipse, v = √[μ (2/r − 1/a)]. Earth’s printed perihelion is 30.287 km/s and aphelion is 29.291 km/s, from the Sun’s GM. The Earth Fact Sheet lists 30.29 and 29.29 km/s. Moon, Mars, a 400 km circle, and a schematic ellipse. Educational schematic, not an ephemeris.

An impulsive Δv changes specific orbital energy by v·Δv + ½(Δv)². From a 400 km classroom circle, Δv to escape is 3.178 km/s. The same 1 km/s gains 8.173 km²/s² there and 3.575 km²/s² on a geosynchronous classroom circle. Fact-sheet GM. Educational schematic, not a mission.

Δv = ve · ln(m0/mf) = Isp · g0 · ln(m0/mf), with g0 = 9.80665 m/s². At the Oberth desk’s 3.178 km/s and a classroom 450 s, mf/m0 = 0.4867. The Hohmann desk’s 5.594 km/s is the other comparison. Ideal rocket, no gravity losses, no drag. Educational schematic, not a mission.

An unpowered hyperbola turns v∞. Earth’s classroom 5 km/s pass at 400 km turns 89.16°. Heliocentric speed goes from 26.515 km/s to 33.484 km/s. The assist magnitude is 7.019 km/s. Jupiter, at the same excess and periapsis ratio, turns 160.50°. Fact-sheet GM. Educational schematic, not a mission.

C3 = v∞² for a hyperbolic departure from a circular parking orbit. At 400 km, C3 = 0 is a 3.178 km/s burn. A classroom v∞ of 3 km/s is C3 = 9 km²/s² and a 3.585 km/s burn. The same C3 on the geosynchronous classroom circle is 2.208 km/s. Fact-sheet GM. Educational schematic, not a mission.

Top-down rotating frame of the primary, the secondary, and L1 through L5. Hill approximation beside a numerical collinear root, from NASA fact-sheet masses and semimajor axes. Sun–Earth L1 is 1,491,557 km from Earth and L2 is 1,501,538 km. Earth–Moon L1 is 326,380 km from Earth and 58,020 km from the Moon. Educational schematic, not a mission.

Fluid Roche distance 2.44 R times the cube root of the density ratio, and a rigid distance with 1.26. Saturn–Rhea and Earth–Moon sit outside both. Mars–Phobos sits between them. Fact-sheet densities, radii, and mean orbits. Educational schematic, not an ephemeris.

Hill radius r_H ≈ a (m/(3M))^(1/3) for a low-mass secondary on a circular orbit, with the μ form beside it. Sun–Earth is 1,496,565 km. The Moon sits inside. Jupiter’s sphere is 53,147,220 km. Phobos is deep inside Mars’s, and between the Roche limits. Fact-sheet masses. Educational schematic, not an ephemeris.

Apparent size δ = 2·arctan(d / 2D), with the small-angle d/D beside it. A mean-perigee Moon is 32.880′. An aphelion Sun is 31.448′. Ratio above 1 can be total; below 1 is annular. NASA fact-sheet diameters and distances. Educational schematic, not an ephemeris.

Pick a body and an altitude. Circular speed is √(GM/r). Escape speed is √(2GM/r). Presets use NASA fact-sheet GM and volumetric mean radius. Earth’s surface escape is 11.186 km/s. A sideways launch draws the fall, the circle, the ellipse, and escape. Educational schematic, not a trajectory.

Top-down Sun and one circular orbit. Drag semi-major axis from inside Mercury to past Neptune. Predicted period is a^(3/2). Presets use NASA fact-sheet AU lines and sidereal periods. Earth’s sheet prints 1.00000011 AU and 365.256 days. Educational schematic, not an ephemeris.

North-up Moon globe. The same face stays toward Earth. Eccentricity 0.0549 peeks past the east and west limbs. The equator is tilted 6.68° to the orbit, so the nod peeks past the poles. A JPL note says 59% of the surface is visible over time. The peek is drawn large. Not an ephemeris and not tonight’s Moon.

Day-of-year slider on a schematic analemma: solar declination against the equation of time. Tilt plus an elliptical orbit. Classroom approximation, not a sundial or an ephemeris.

Drag Earth around a circular orbit and read the angle at a nearby star. Distance in parsecs is 1 divided by the parallax in arcseconds. Proxima and Sirius use cited teaching figures. Classroom schematic, not a catalog or a finder chart.

m − M = 5 log10(d / 10 pc) + A. Parallax d(pc) = 1/p, with the asymmetric bounds 1/(p±σ). Cepheid M_V from Benedict et al. 2007, Table 12, column B07: −4.05 + (−2.43)(log10 P − 1), Johnson V. Type Ia M_B = −19.25 from Richardson et al. 2014. Low-z d = cz/H0 with Planck 67.4 and SH0ES 73.04. Cited presets: the Sun at 10 pc, Sirius, δ Cephei, SN 2011fe, and the Coma cluster. Approximate ranges. Not a catalog.

Numerical integral of Hogg’s E(z), radiation omitted. Planck 2018 Table 2, TT,TE,EE+lowE+lensing: H0 = 67.36, Ωm = 0.3153, ΩΛ = 0.6847, age 13.801 Gyr against the published 13.797 ± 0.023 Gyr. SH0ES H0 = 73.04 keeps those densities. Outputs: age today, age at z, lookback, comoving, luminosity, and angular-diameter distance, plus kiloparsecs per arcsecond. Angular-diameter distance peaks near z = 1.59. Cited redshifts: Coma (cz = 6853 km/s), 3C 273, GN-z11, and the CMB at z* = 1089.92. Flat by default; curvature is optional. Classroom schematic, not a fit.

HR = ZHR × sin(h) / r^(6.5 − LM) × (1 − cloud). A radiant at or below the horizon gives 0. IMO’s ZHR 100 table at limiting magnitude 6.5 and 30° is 50. Seven showers from the 2026 working list, with parents from that calendar or the JPL stream table. Sky buttons are approximate. Not a forecast.

Mass of a sphere, kinetic energy in joules and megatons (1 Mt = 4.184 × 10^15 J), and Collins, Melosh, and Marcus 2005 equations 21, 22, and 27 for the transient crater and the final rim. Equation 3 is the whole-Earth recurrence. Presets cite Chelyabinsk, Tunguska, Barringer, and the program’s Chicxulub template. Simplified scaling. Not a hazard assessment.

Apparent magnitude m, absolute magnitude M, and m − M = 5 log10(d / 10 pc). Five magnitudes is a flux ratio of 100. At 10 pc, m = M. The Sun’s fact-sheet absolute magnitude +4.83 is how it would look from there. Visual V band, no extinction. Classroom schematic, not a catalog.

A non-rotating hole. r_s = 2GM/c². The photon sphere is 1.5 r_s and the ISCO is 3 r_s. The IAU nominal solar mass is 2.953 km. A hovering clock reads √(1 − r_s/r). The horizon tide across 2 m is 2GM L/r³. Hawking temperature and the evaporation time are order-of-magnitude figures. Presets: 1 and 10 solar masses, Cygnus X-1 (21.2 ± 2.2 M☉, Miller-Jones et al. 2021), Sagittarius A* (4.297 × 10⁶ M☉, GRAVITY Collaboration 2022), and M87* (6.5 × 10⁹ M☉, EHT 2019). Real holes spin.

Planck’s curve, Wien’s peak λ_max = b/T with the CODATA constant, and L = 4πR²σT⁴ against the IAU 2015 nominal Sun. Presets for the Sun, Proxima, Vega, Rigel, and Betelgeuse use cited temperatures and radii. The color chip is an sRGB approximation. Not a stellar-atmosphere model.

Effective temperature versus luminosity, hot on the left. Stefan–Boltzmann iso-radius lines use the CODATA σ and the IAU 2015 nominal Sun. Cited presets for the Sun, Proxima, Vega, Sirius A, Sirius B, Betelgeuse, and Rigel. Schematic main sequence, giants, and white dwarfs. Not a Gaia catalog and not an ephemeris.

z = (λ_obs − λ_rest)/λ_rest. At z = 1 the special-relativistic Doppler formula gives β = 0.6, while c·z equals c and is not a speed. Cosmological redshift is 1+z = a_now/a_then. A nearby Hubble toy uses Planck 2018 H0 = 67.4 and SH0ES 2022 H0 = 73.04. Cited lines and presets. Not a catalog spectrum.

Interactive color lesson: OBAFGKM spectral types, luminosity class, and stellar life phases — Sun-like and high-mass paths. Educational schematic, not a research tool.

How we find planets around other stars — transit, radial velocity, imaging, microlensing, timing — plus a curated teaching set of 100+ confirmed worlds. Educational, not a catalog dump.

Focal ratio, magnification, exit pupil, and a rough true field. Light grasp against a 7 mm comparison pupil. Rayleigh’s 1.22 λ/D and Dawes’s 116/D mm (and 4.56/D in). A classroom 200 mm f/6 with a 25 mm eyepiece is 48×, Rayleigh 0.692″ at 550 nm. Hubble 2.4 m at f/24 and JWST 6.5 m / 131.4 m are cited presets with no eyepiece. Not a buying guide.

Depth δ ≈ (Rp/R*)², geometric transit probability ≈ R*/a, a circular-orbit duration, and radial-velocity semi-amplitude K with m sin i. Earth–Sun, from the fact-sheet radii and GM at i = 90°, is 83.86 ppm and 8.95 cm/s. Jupiter–Sun is 1.010% and 12.46 m/s. Cited presets include HD 209458 b, 51 Pegasi b, TRAPPIST-1 e, and GJ 1214 b. Uniform disk, no limb darkening, no eccentricity. Not a catalog.

A log mass slider from 0.1 to 60 solar masses. Luminosity inside 0.179 to 31 solar masses is Eker et al. 2018, Table 4. Lifetime is t ≈ 10 Gyr × M/L. The Sun’s nominal row is 10 Gyr; the fit at 1 M☉ is about 0.984 L☉. End states follow NASA’s rough split. The Planck age on the plot is 13.797 Gyr. Cited presets include the Sun, Proxima Centauri, Sirius A, Vega, and Rigel. Approximate scaling estimates. Not a stellar-evolution model.

Stellar flux S/S⊕ = (L/L☉)/d² and watts from the NASA Earth Fact Sheet solar irradiance, 1361.0 W/m². Equilibrium temperature assumes full heat redistribution. Earth’s Bond albedo 0.294 gives 255.1 K. The strip is Kopparapu et al. 2014, valid from 2600 K to 7200 K, and is not drawn outside that range. Not a habitability verdict.

Clickable cross-section of Earth’s air — layers, heights, and environmental stakes.

Light pollution literacy — skyglow, glare, trespass; wildlife and circadian notes; DarkSky fixes; Bay Area angle. Not medical advice.

Jim Campbell’s crown as public art and as metro-scale glow — inward-facing LEDs, skyglow literacy, South Bay unease. Cited. Not a hit piece.

Interactive lesson — grade/tonnage toy, lithium path picker (brine / hard-rock / clay), processing stages, geography literacy, env/social notes. Cross-links Rushes.

Ice cut, housed, and shipped like a seasonal ore — from Mari and the Zhou pits through Tudor, Norway, and Chimborazo. Polar bulk shipping did not happen. Timeline. Cited.

Iron fertilization vs mining particle plumes — what sank, what died in lab/field evidence, what’s still uncertain. Cited. Not a geoengineering or mining pitch.

Interactive particle-physics literacy — quarks, leptons, gauge bosons, Higgs, three generations, three forces. Gravity and dark matter sit outside. Cited CERN / Fermilab / PDG. Not a QFT course.

Interactive gravity literacy — everyday weight, Newton’s inverse-square law, Einstein’s spacetime, why the Standard Model omits it. Cited NASA / NIST / CERN. Not a GR course.

Interactive spectrum literacy — tap Radio through Gamma, slide a Wien’s-law peak. Cited NASA classroom ranges. Not a lab instrument or medical advice.

Hub for game guides and local tools. Separate from the playable browser games under /games/. Nothing you open here is uploaded.

Plot planetary bases from exported JSON or a Steam save.hg on a schematic galaxy. Zoom in and same-system bases spread apart, with names. Euclid Hub capital is Uthmi Beta. Freighter bases stay off the map. Local only.

Edge explorer for the shared material graph. Made from and converts to, with portable, medium, and inventory badges. Community data — a patch can change a recipe.

Dense grid of minerals, gases, plants, earth, components, products, and consumables. Mark several. Pin a short list in this browser. The address carries the open item.

A stub. It reads the moodboard pins. The production planner comes later.

Language practice on this site. The first page is an American Sign Language trainer.

Original diagrams for fingerspelling A–Z, numbers 0–20, and a starter vocabulary. Learn, Leitner flashcards, quizzes, a fingerspelling reader, and spell-it practice. Progress stays in the browser. Not a class.

Sitemap for the news desks — science headlines first, more to come.

BBC Science, NASA, Phys.org, and ScienceDaily — public RSS in the browser.