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://messier.seds.org/
The SEDS Messier Database is a comprehensive reference for all 110 objects in Charles Messier's famous catalog of nebulae, star clusters, and galaxies, compiled by the French astronomer between 1758 and 1782. Visitors can browse detailed entries with images, follow Messier Marathon news and results, and explore deep sky objects organized by type, making this a go-to resource for amateur astronomers worldwide.
https://atmos.uw.edu/marka/ca.normals.html
Hosted on the University of Washington's atmospheric sciences domain, this page presents California's observed climate normals for the 1971-2000 period, including mean monthly precipitation and daily maximum and minimum temperatures. Visitors can click on map markers to explore station-level climate data across the state, making it a handy reference for researchers, students, and weather enthusiasts.
http://bozonets.com/
Bozo Net is a VHF/UHF amateur radio community site centered around the Los Angeles and Central California ham radio scene, with a charming origin story about the 144.200 MHz national calling frequency and how the nickname 'Bozo' was born. The site covers topics like beacon info, HOA antenna restrictions, tower raising, and links to ARRL legislative efforts affecting amateur radio operators.
http://sten.astronomycafe.net/the-astronomy-cafe
NASA scientist-educator Sten Odenwald has maintained this astronomy education hub for over 20 years, filling it with popular essays on cosmology, black holes, space travel, and the weird corners of nature. Visitors will find Q&A resources, blog posts on recent space discoveries, and details on his published books including a photo-filled history of space exploration through 100 iconic objects.
https://ure.es/
The Unión de Radioaficionados Españoles (URE) is Spain's national amateur radio association and the Spanish section of the IARU, serving as the official body representing ham radio operators across the country. The site offers licensing information, exam guidance, contest calendars, QSL traffic resources, a webcluster, a members-only area, and a regularly published magazine called Radioaficionados.
http://web.mit.edu/redingtn/www/netadv/welcome.html
Created by Norman Hugh Redington at MIT, The Net Advance of Physics is an encyclopedic collection of review articles and tutorials covering the full breadth of physics, organized alphabetically and continuously updated since 1995. Special features include a 19th century physics retro archive, history of science resources, a science poetry collection, and curated links to recent controversies in the field.
http://astroa.physics.metu.edu.tr/bigeyes.html
A comprehensive reference table listing the world's largest optical telescopes, compiled by Bill Arnett and hosted at Middle East Technical University's physics department. Each entry includes the telescope's aperture, name, geographic coordinates, altitude, and technical notes, making it a handy quick-reference for astronomy enthusiasts and researchers.
http://asnne.org/
The Astronomical Society of Northern New England (ASNNE) is an all-volunteer non-profit based in Kennebunk, Maine, founded in 1982 to promote public awareness of astronomy. Members enjoy star parties, telescope observing sessions, monthly discussions, and access to the Starfield Observatory, making it welcoming for beginners and experienced amateur astronomers alike.
https://www.qsl.net/oe7cwj
Christian Wieser's amateur radio page, hosted on QSL.net under the callsign OE7CWJ, appears to be a minimal personal station page that redirects visitors to a new site at qsl.net/oe3cwj. The QSL.net domain and Austrian callsign prefix make clear this belongs to a licensed ham radio operator from the OE (Austria) region.
http://tropic.ssec.wisc.edu/
Run by the Cooperative Institute for Meteorological Satellite Studies at the University of Wisconsin-Madison, this site provides real-time satellite-based analysis tools and data products for tracking and studying tropical cyclones worldwide. Researchers and weather enthusiasts alike will find an impressive suite of tools including intensity estimation algorithms, microwave imagery composites, and a full archive covering Atlantic, Pacific, Indian Ocean, and South Pacific storm basins.