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://currentsky.com/
Bob Riddle's 'Qué tal in the Current Skies' is a long-running amateur astronomy site that began in the late 1980s as posts to the Big Sky Telegraph BBS and evolved over 30+ years into a web resource covering Earth and Space topics. The site now serves as a transitional landing page pointing visitors to his continuing work on Substack, with archived daytime and nighttime sky photos, calendar data, and astronomical observations.
https://macastro.org.au/
The Macarthur Astronomical Society serves amateur astronomers in Sydney's south west, offering field nights at multiple observation sites, astro imaging workshops, citizen science projects, and a Deep Space Hunt program. With resources like the Messier and Caldwell lists, ISS tracking, sky conditions, and a 2028 Solar Eclipse planning page, this is a well-rounded hub for a genuinely active local astronomy club.
https://barriearc.com/
The Barrie Amateur Radio Club (VE3GCB) is a Canadian ham radio club based in Barrie, Ontario, offering monthly meetings, beginner licensing courses, a builders group, and a variety of on-air activities including DMR and HF propagation. The site covers club repeater info, AUXCOMM emergency communications, 3D printing projects, and community events, making it a rich hub for local amateur radio operators of all experience levels.
https://www.qsl.net/k6ls/test.html
Phil (K6LS) has assembled an extensive directory of links to test and measurement equipment manufacturers, dealers, and related resources for amateur radio and electronics hobbyists. The collection spans commercial makers like Tektronix, Fluke, and Rohde & Schwarz alongside used equipment dealers, repair services, and homebrew resources, making it a useful reference for anyone sourcing or servicing RF test gear.
https://spacewatch.lpl.arizona.edu/fmo-project/overview
The SPACEWATCH® FMO Project, run by the University of Arizona's Lunar and Planetary Laboratory, documents the detection of Fast Moving Objects, which are near-Earth asteroids passing so close that they appear as light trails in telescope imagery. The site explains the science behind close-approach asteroid detection, shares discovery images, and describes the citizen participation program that once helped identify faint FMOs.
https://umass.edu/rso/hamradio
The official homepage of the UMASS Amateur Radio Club (callsign W1PUO), a student-run club at the University of Massachusetts Amherst founded in 1996 by College of Engineering students. The club offers a shared radio shack, licensing classes for prospective hams, and public service events open to all five-college university students, faculty, staff, and their families.
http://heavens-above.com/
Heavens-Above, developed by Chris Peat, provides real-time satellite tracking and pass predictions customized to your exact location, covering the ISS, Starlink, Hubble, and hundreds of other spacecraft. Beyond satellites, the site offers interactive sky charts, solar eclipse data, comet and asteroid tracking, and deep space mission information, making it an essential tool for backyard astronomers and satellite spotters alike.
https://www.qsl.net/w4bkm
A QSL.net-hosted page for amateur radio operator W4BKM, part of the well-known ham radio community hosting platform. The site appears to be a personal station page, accessible through the QSL.net directory which is dedicated to ham radio operators worldwide.
https://deepimpact.astro.umd.edu/
The official University of Maryland archive for NASA's Deep Impact mission, which sent a spacecraft to collide with comet Tempel 1 in 2005 and later extended its mission as EPOXI to observe comet Hartley 2 and distant exoplanets. The site preserves science results, image and video galleries, team member profiles, and mission history through the spacecraft's final loss of contact in 2013.
https://taygeta.com/random/gaussian.html
Taygeta Scientific Inc. presents a technical reference on generating Gaussian pseudo-random numbers using the Box-Muller transformation, written by Dr. Everett (Skip) F. Carter Jr. The page includes code examples, a step-by-step Weibull distribution walkthrough, and an academic reference list covering stochastic modelling and Monte Carlo methods.