Science & Nature
1439 sites
Subcategories:
- Astronomy & Space (396)
- Chemistry (8)
- Earth Sciences (26)
- Biology (79)
- Physics (30)
- Mathematics (59)
- Weather & Climate (104)
- Amateur Radio (682)
- Electronics (47)
http://www.dmx512.com/
DMX512.com is a technical reference hub dedicated to entertainment technology, covering stage lighting, audio, communications, MIDI, show control, and power systems for theatre production. Named after the DMX512 lighting control protocol, the site organizes resources across multiple categories including net resources, reference materials, and even accident reports relevant to technical theatre professionals.
http://metroplex.org/
The Metroplex Amateur Radio Association (ARA) out of Fort Lee, NJ maintains this page listing their repeater frequencies, EchoLink node information, and club officers. A historic photo of core members from 2000 honors the club's founder, Alex Magocsi W2OV, and a membership application form is available for prospective hams.
http://scarc.com/
SCARC appears to be the website for an amateur radio club, offering resources and information for ham radio enthusiasts in its region. Club-based amateur radio sites like this typically feature member info, repeater details, licensing resources, and local on-air event announcements.
http://laughton.com/paul/rfo/rfo.html
Named in honor of Nobel Prize-winning physicist Richard Feynman, this amateur astronomy site showcases CCD astrophotography of nebulae, planets, and galaxies captured through telescopes ranging from a 4-inch Takahashi to a Celestron C11. Visitors will find detailed equipment reviews, imaging guides, comet and planet sequences, and a rich gallery of deep-sky objects including the Horsehead Nebula, M42, and Hale-Bopp.
https://astunit.com/astunit_tutorial.php?topic=glossary
The Astronomical Unit is a comprehensive astronomy tutorial site covering everything from choosing a first telescope to positional astronomy, stellar evolution, and debunking pseudoastronomy claims. Visitors will find practical guides, a detailed glossary, book recommendations, DIY telescope projects, and rigorous critiques of popular astronomical myths like the '2012 nonsense' and Apollo conspiracy theories.
https://shallowsky.com/jupiter.html
Akkana Peck's Juplet page offers a Java applet and JavaScript tool for tracking the positions of Jupiter's four Galilean moons, their shadows, and the Great Red Spot in real time. A labor of love rooted in real astronomical calculations from Jean Meeus' algorithms, the page also includes telescope sketches, links to Jupiter observation resources, and satellite event data.
http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/svr/home.rxml
Part of the University of Illinois WW2010 online meteorology project, this module covers severe storms in depth using the NOAA Severe Storms Spotters Guide as its foundation. Visitors can explore thunderstorm types, tornado formation, updrafts and downdrafts, and even computer modeling of supercells and squall lines through a well-structured educational guide.
https://www.qsl.net/mid-islandarc
The Mid-Island Amateur Radio Club (MIARC) serves ham radio enthusiasts on Long Island, New York, with club info covering repeaters, membership applications, and Field Day photos. A community hub for local hams, the site also features a bulletin board, swap shop, and links to related resources including VE exam info and ARRL connections.
http://vacuumtubes.com/
Vacuumtubes.com, run by Jonathan Oas out of Hartland, MN, is an online storefront selling vacuum tubes, electron tubes, tube testers, tube sockets, and related electronic parts organized into extensive alphabetical tube lists. The inventory spans everything from rare Western Electric and antique tubes to popular audio types like the 12AX7, 6L6, and EL34, making it a go-to source for vintage audio and electronics enthusiasts.
https://empslocal.ex.ac.uk/people/staff/mrwatkin
Matthew R. Watkins is a mathematician and honorary researcher at Exeter University whose site centers on his celebrated 'Secrets of Creation' trilogy, making analytic number theory and prime numbers accessible to general audiences. The site also features a number theory and physics archive, prime number resources for beginners, and links to his eclectic range of interests including parapsychology, the I Ching, and psychogeography.