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://netside.net/starhustler
The official web home of 'Star Gazers,' the world's only weekly PBS television series dedicated to naked-eye astronomy, hosted by the legendary Jack Horkheimer. Visitors can stream current and past video episodes, browse show scripts, read FAQs, and find local astronomy clubs and planetariums.
https://contestcalendar.com/
Run by Bruce Horn (WA7BNM), this comprehensive calendar tracks amateur radio contests worldwide, offering 8-day, 5-week, 12-month, and perpetual views alongside rules summaries, log submission deadlines, and historical data going back to 2005. Hams can customize the calendar to display only their preferred contests and even subscribe to a weekly email digest, making it an essential reference for the contesting community.
http://abmedia.com/astro
Chris Cook's extensive astrophotography portfolio spans nearly four decades of celestial imaging, featuring deep sky objects, comets, eclipses, auroras, and stunning nightscape photography captured on both film and digital equipment. With NASA APOD features, astrophotography workshops, and a vast archive organized by technique and subject, this is a remarkable showcase of dedication to the craft.
http://meteorlab.com/
New England Meteoritical Services (meteorlab.com) is a long-running resource dedicated to everything about meteorites, including identification, appraisal, and high-resolution structural imagery through a companion site covering primary and secondary meteorite structures. The organization has been online since 1994 and served as examiner and appraiser of the historic Huss-Nininger Collection of Meteorites and Tektites, making it a notable reference for both collectors and researchers.
https://qsl.net/kc0dbu/post30.htm
Explorer Post 30 is a youth scouting group based in Springfield, Missouri with a focus on amateur radio and related activities. The site links to ARRL and QSL.net resources, features post event photos, and connects members with local and area clubs.
http://discovercircuits.com/
DiscoverCircuits.com, run by engineer Dave Johnson P.E., is a massive repository of over 45,000 free electronic circuits and schematics cross-referenced across 500+ categories for engineers, hobbyists, inventors, and students. Online since 2002, it serves as a go-to reference for quick design ideas, circuit solutions, and component resources covering an enormous breadth of electronic applications.
https://radioamator.ro/
Radioamator.ro is a comprehensive Romanian-language portal for amateur radio operators, covering everything from equipment construction and digital communications to DX activities, contest calendars, and propagation bulletins. The site serves the Romanian ham radio community with articles, a callbook, forums, and links to the Romanian Amateur Radio Federation.
http://jap.hu/electronic
Peter's DIY electronics hub showcases a range of original hardware projects including relay modules for Raspberry Pi and Arduino, PIC microcontroller circuits, remote control encoders, and an LCD thermometer. Each project comes with schematics and build guides, making this a great resource for hobbyist engineers looking for practical, hands-on circuit designs.
http://okie-tex.com/index.php
The Okie-Tex Star Party is an annual astronomy event held at Camp Billy Joe in the Black Mesa area of Oklahoma, offering some of the darkest skies in the Southwest for stargazers. The site covers everything attendees need, including registration, event schedules, observing lists, meal menus, accommodation info, and a photo gallery from past gatherings.
https://k7su.com/
Kelly Klaas (K7SU) runs this personal hub covering amateur radio, handmade Morse code keys, woodworking, laser engraving, and voice-over work. The site serves as a launchpad to several distinct projects, with the handmade keys and ham radio content being the clear centerpiece.