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://flame.org/~cdoswell/chasesums/chasesums.html
Chuck Doswell's storm chasing page chronicles over three decades of tornado pursuit, beginning with his first chase in April 1972 and including detailed logs, historical accounts, and safety advice drawn from genuine scientific expertise. Packed with chase summaries, photography links, and connections to fellow chasers and meteorologists, this is a deep and personal record from one of the field's most experienced practitioners.
https://qsl.net/ka0loo
The Webster County Amateur Radio Club (WCARC) out of Fort Dodge, Iowa maintains this late-1990s club homepage covering membership info, meeting calendars, local repeater details, and ham radio resources. The site includes officer contacts, a classified market for used equipment, links to ARRL and QRZ, and even a sample license exam for prospective hams.
https://oasi.org.uk/
The Orwell Astronomical Society Ipswich (OASI) is a UK-based astronomy club centered at the historic Orwell Park Observatory in Suffolk, welcoming everyone from casual stargazers to dedicated amateurs with specialist observing and telescope-building skills. The site features upcoming lecture events and Zoom talks, member observing reports, a newsletter archive, comet guides, and a rotating gallery of impressive astrophotography captured by members.
https://ourcolorfulcosmos.com/
Steve Mazlin, MD shares his stunning astrophotography collection at Our Colorful Cosmos, featuring images organized into sections covering nebulae, galaxies, star clusters, and the solar system. The image-heavy site showcases deep-sky photography from a dedicated personal observatory, with a companion YouTube channel under the handle 'mazlinithegreat' for additional content.
http://nlsa.com/
Northern Lights Software Associates offers Nova for Windows, a satellite tracking program used by NASA, the U.S. Air Force, and thousands of amateur radio operators worldwide. Now available as freeware, Nova provides real-time tracking of unlimited satellites with detailed maps, ground tracks, and Keplerian element updates.
https://qrp-labs.com/
QRP Labs sells a wide range of amateur radio kits including multi-band transceivers, CW rigs, GPS receivers, synthesizers, and high-altitude balloon trackers at budget-friendly prices. The site is a go-to destination for QRP radio enthusiasts who enjoy building their own equipment, with kits ranging from beginner-friendly to highly technical designs like the WSPR balloon tracker.
https://jedaler.tripod.com/elec.html
Jedaler's Electronics Page, built by JaKab-Daniel, is a curated link collection focused on circuit schematics, microcontrollers, RF antennas, robotics, and hobby electronics projects. Visitors will find references to PIC microcontroller resources, Tesla-related circuits, xenon flash designs, and free energy machine plans alongside general electronics archives.
http://vdazone.org/hamlinks.html
Compiled by the Northern Berkshire Amateur Radio Club (NoBARC), this extensive link directory covers virtually every corner of amateur radio, from ARRL resources and antenna plans to ATV, SSTV, antique radios, and weather satellite imagery. With over 1,300 curated links organized into dozens of categories, it serves as a comprehensive jumping-off point for ham radio operators of all interests.
https://hamqsl.com/
Paul Herrman (N0NBH) built this comprehensive resource for ham radio operators tracking HF propagation conditions, offering free solar-terrestrial data widgets, banners, and tools that can be embedded in any website. Visitors will find online calculators for SFI/SN conversion, K-Index to signal noise, Aurora latitude tools, MUF/LOF prediction maps, and live solar flux and sunspot data updated every few hours.
https://onlinestatbook.com/rvls.html
The Rice Virtual Lab in Statistics (RVLS), created by David Lane at Rice University, offers a comprehensive suite of free web-based tools for learning and teaching statistics, including an interactive online textbook, Java simulations, real-world case studies, and an analysis lab. Supported by the National Science Foundation and recognized by multiple educational organizations, it covers topics from basic descriptive statistics to ANOVA and regression.