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://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://bara.org/
The Bergen Amateur Radio Association (BARA) is a New Jersey-based ham radio club serving Bergen County, with monthly meetings, weekly nets, VE exams, and semi-annual hamfests. Members range from antenna specialists to digital mode enthusiasts, and the club has a strong tradition of technical knowledge sharing and community participation.
https://ncdxf.org/
The Northern California DX Foundation (NCDXF) is a charitable organization founded in 1972 that provides financial support for DXpeditions to rare DXCC entities around the world. Visitors can explore funded expeditions, apply for grants, learn about the NCDXF-IARU Beacon Project, and find resources for the amateur radio DX community.
https://flintriverastronomy.org/
The Flint River Astronomy Club (FRAC) is a Georgia-based astronomy club serving the Griffin area, hosting monthly meetings, public observing events at Indian Springs State Park, and club observing weekends at Joe Kurz WMA. Members have access to observing lists, tools, national awards, newsletters, and articles, making this a well-rounded hub for amateur astronomers in the region.
http://stargazing.net/mas
The Muskegon Astronomical Society is a Michigan-based non-profit astronomy club founded in 1972, with its own multi-building observatory complex and an active membership of stargazers. The site features astrophotography from members including nebulae, auroras, comets, and Saturn, plus comet ephemeris tools, observing links, a club events calendar, and JavaScripts for night sky calculations.
https://countyhunter.com/
CountyHunter Dot Com, run by Dennis L. Hall (KK7X) since 1997, is a dedicated resource for amateur radio operators pursuing the USA Counties Award (USA-CA) from MARAC. It provides commonly used county hunter frequencies across SSB, CW, and PSK modes, serving as a quick reference for ham radio enthusiasts worldwide.
http://wasser-wissen.de/index.html
Wasser-Wissen is a German-language internet portal dedicated to water and wastewater topics, featuring an A-Z encyclopedia, news, link directories, legal references, and resources on water management and environmental systems. The site covers everything from chemical elements relevant to water chemistry to sewage treatment plants, court rulings, dissertations, and international water management organizations.
https://qsl.net/kb1bzp
SCRAMS (KB1BZP) stands for Southeastern Connecticut Radio Amateur Mobile System, a local amateur radio club that has relocated its web presence. This page is a simple redirect notice pointing visitors to the club's new home and asking them to update their bookmarks.
http://starshadows.com/
Star Shadows Remote Observatory (SSRO) was a cooperative astro-imaging venture cofounded by Rick Gilbert, Jack Harvey, Steve Mandel, and John Pierce, producing deep-sky images from New Mexico and Cerro Tololo Inter-American Observatory in Chile from 2004 to 2018. The archived site offers access to their gallery, equipment details, and documents from over a decade of collaborative astrophotography.
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.