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)
https://www.qsl.net/evarc
The Elkhorn Valley Amateur Radio Club (EVARC) serves ham radio enthusiasts in Norfolk, Nebraska, with meeting schedules, repeater frequencies, club nets, and licensing test sessions. Maintained by Monty Wilson NR0A, the site also links to propagation tools, ARES registration, local hamfest info, and nearby radio clubs across Nebraska.
https://cosmotography.com/index.html
Cosmotography is the astrophotography showcase of R. Jay Gabany, a 2010 AAS Chambliss Amateur Achievement Award recipient who captures stunning CCD images of galaxies, nebulae, star clusters, and more using high-end telescopes across multiple observatories worldwide. The gallery features meticulously processed multi-exposure color images taken through remotely controlled observatories in California, Kitt Peak Arizona, and Melbourne Australia, making it a remarkable window into deep-sky imaging at the amateur-professional frontier.
https://qsotoday.com/podcasts
QSO Today is a long-running weekly podcast hosted by Eric, featuring in-depth interviews with amateur radio operators covering topics from homebrew transmitters and vintage gear to SDR, contesting, and DXpeditions. With over 535 episodes archived and a searchable episode list, it's an invaluable audio resource for ham radio enthusiasts at every experience level.
https://dbbear.com/k0emt
K0EMT is a well-stocked amateur radio resource from a Missouri ham covering antenna projects, kit building, QRP portable operation, Morse code learning, and POTA activations. Visitors will find detailed build logs, operating aids, equipment tips, and software projects spanning everything from EFHW transformers to DXSpot interfaces.
https://dictionary.obspm.fr/
Created by M. Heydari-Malayeri at the Paris Observatory, this trilingual etymological dictionary covers thousands of astronomy and astrophysics concepts in English, French, and Persian, tracing the roots and definitions of terms from the oldest to the newest. It stands out as a freely accessible, interdisciplinary reference that fills a gap left by conventional astronomical glossaries, with entries organized alphabetically and supplemented by historical and linguistic context.
https://f6fbb.org/
F6FBB is the home of FBB, a well-known Packet-Radio BBS software used by amateur radio operators worldwide. The site serves as a resource hub for the FBB software project, covering packet radio bulletin board systems and related amateur radio digital communications.
http://finitegeometry.org/sc/16/quiltgeometry.html
Created by Steven H. Cullinane, this page explores the mathematical geometry underlying quilt block design, connecting symmetry theory to traditional patchwork patterns. It organizes curated resources across three difficulty levels, from elementary classroom guides to advanced topics like block designs in art and mathematics.
http://mndmr.net/
MNDMR.net is the home of Minnesota's first in-house DMR repeater CBRIDGE network, providing information about connected repeaters, talkgroups, and codeplugs for digital radio users in the region. The site serves the local amateur radio community with resources for the MNSTATE and MNTAC talkgroups on the Brandmeister network.
https://micro.magnet.fsu.edu/primer/java/scienceopticsu/powersof10
Hosted by Florida State University's National High Magnetic Field Laboratory, this interactive tutorial takes visitors on a visual journey from 10 million light-years away down to the subatomic level in successive powers of ten. The experience moves through galaxies, the solar system, Earth, a leaf, its cells, DNA, and finally protons and electrons, making the concept of scale tangible and awe-inspiring.
https://www.qsl.net/races
The national web presence for the Radio Amateur Civil Emergency Service (RACES), a program coordinating licensed amateur radio operators for emergency and disaster communications across the United States. Maintained by Ken Bourne (W6HK) since 1997, the site covers FCC RACES rules, news, volunteer protection information, and links to local RACES groups nationwide.