Science and Mathematics

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## Science and Mathematics
Units of measurement *Guide for the Use of the International System of Units*- Section B.8 of that publication lists all the conversion factors you would ever need between related SI units, and between SI units and other measurement systems, including British/American.
## Astronomy – Astrophysics – Cosmology## Observational AstronomySee Astronomy Links @ wx.awcolley.com ## Space MissionsIn Development - James Webb Space Telescope (Hubble follow-on) • Building 29 clean-room webcam
Ongoing - ACE — Advanced Composition Explorer
- Cassini-Huygens — mission to Saturn and Titan
- Herschel Space Observatory (ESA) • NASA • CalTech
- Hubble Space Telescope — not physically traveling through the solar system, but looking toward the edge of the universe!
- Mars Reconnaissance Orbiter — detailed views of the nearby red planet
- Mars Rovers — Spirit and Opportunity continue to provide incredible views of the Martian landscape.
- Planck (ESA) • Spacecraft Ops • Science Team
- SOHO — Solar and Heliospheric Observatory
- Voyager — the granddaddy of space missions, Voyager 1 was launched on the morning of 05 September 1977 and has traveled farther than anyone, or anything, in history (about 12 billion miles by September 2013). In September 2012, Voyager 1 crossed over into interstellar space. Voyager I continues to move away at more than 38000 miles/hour (61290 km/hour), which is 17 miles every second!
- WMAP — Wilkinson Microwave Anisotropy Probe
Completed - Deep Impact — the headline: Man Hits Comet
- Genesis "
*Search for Origins*" - Stardust — through the tail of a comet and home again, the rest of this spacecraft was sent on to return to Comet Tempel (Deep Impact) hoping to get a good view of the man-made crater in 2011 (but didn't make it)
- Ulysses — traveling where no man-made object has gone before, in an orbit perpendicular to the plane of the planetary orbits, over the north and south poles of the Sun
Earth Observations - NASA Earth Observatory
- MODIS Mission • IOTD • Rapidfire • Rapidfire Image Gallery • MODIS Today
- CloudSat — a satellite conceived and monitored by my alma mater, Colorado State University, to provide 3d radar views of clouds
- SeaWinds on QuickSCAT — measuring the winds on the 75% of this planet that man cannot live on
- Earth Observing System — all of NASA’s programs studying Earth
- Visible Earth — NASA’s photo gallery of Earth, including from manned space missions
## Cool videos- What if Earth had rings like Saturn
- The Known Universe — scaling out from the Himalayas to the fringes of the observable universe
- The Geostationary Highway
## Physics – Chemistry## Reference Data- NIST Reference on Constants, Units, and Uncertainties
- The Photographic Periodic Table – The Wooden Periodic Table
- Dynamic Periodic Table
## DIY Experiments## Geology – Geophysics## Mathematics## General Reference- Wolfram's MathWorld — the web's most extensive mathematical resource, from Wolfram Research, makers of
*Mathematica*. - Handbook of Mathematical Functions (also contains physical constants; sadly, actual function value tables are omitted)
- NIST's Digital Library of Mathematical Functions (an update to the original Handbook above)
## Logics## Various Topics- Back-of-the-Envelope — "pages about approximation", includes "a million dots on one page" ◊ Your Body Ruler ◊ Measuring Angle and Distance with Your Thumb
- Karl's Calculus Tutor — more than just calculus (
*e.g.*how to measure the radius of the earth, the Gaussian Elimination Demo)
## Open Source Software## Online Calculators, Evaluators, Solvers, and Generators- Good Calculators Online
- Sage — Open Source Mathematics Software (some features also provided online)
- Quick Math — an online calculator that solves equations and does all sorts of algebra and calculus problems
- Online Prime Factorization (9 digits)
- Online Prime Factorization (9.5 digits)
- Gaussian Elimination Demo (up to 7 equations)
## Constants, Symbols, and Notation- Table of Mathematical Symbols
- Mathematical Constants, to 50 decimal places
- Pi to 1,000,000 places (the actual page within that site keeps moving)
- Notation for intervals
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Thomas Jefferson |

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