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projectpluto.com favicon

Calculate orbits and track satellites online

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Project Pluto offers astronomy software and online tools for amateur and professional astronomers, including orbit determination and satellite tracking.

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Explore a collection of historical star maps and astronomy resources, featuring scans and information about celestial atlases from past centuries.

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Discover robotic astronomy and meteor insights

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Explore robotic astronomy, meteor info, and stunning astroimages from the Colorado Rockies at Cloudbait Observatory.

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Get real-time asteroid impact alerts

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ATLAS is an asteroid impact early warning system that scans the sky for moving objects and alerts about potential asteroid threats to Earth.

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Get custom high-quality astronomical instruments

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Astrosysteme designs and manufactures high-quality custom astronomical instruments for sky observation enthusiasts and professionals.

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Travel the solar system from your car

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Explore the Maine Solar System Model, a large-scale 3D representation of the solar system spanning 100 miles along U.S. Route 1.

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Get expert advice on choosing your telescope

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Bandit de Nuit offers astronomy tips and telescope guides for enthusiasts passionate about exploring the night sky.

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Hear live meteor echoes from Earth’s atmosphere

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Listen live to meteor echoes as meteors strike Earth's atmosphere, with real-time radio data and meteor shower info.

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Control your NexStar telescope from your PC

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A resource site for Celestron NexStar telescopes offering guides, control software, and telescope info for astronomy enthusiasts.

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Explore the solar system in 3D, live online

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Explore a real-time 3D model of the solar system and night sky, viewing planets, stars, and constellations interactively from your browser.

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Check sky conditions for stargazing

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ClearDarkSky provides detailed sky charts and weather forecasts to help astronomers and stargazers plan the best nights for observing the sky.

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View detailed orbit and gravity simulations

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Explore interactive orbit and gravity simulations of planets, moons, and asteroids, created with Orbit Simulator for astronomy enthusiasts and learners.

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View the sky in real time with a 3D planetarium

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Explore a 3D planetarium and real-time sky guide that lets you discover stars, planets, and timekeeping in an interactive, educational experience.

stellarium-labs.com favicon

View stars and planets on your mobile device

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Explore the night sky with Stellarium Mobile Plus, an app that lets you view stars, planets, and constellations with realistic sky simulations and maps.

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See ISS and satellites from your location

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Track the International Space Station and satellites easily with this mobile app—find out when and where to spot them in the sky near you.

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Explore the night sky interactively

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Explore stars, planets, and constellations with Redshift. Use apps or PC software to discover the night sky and learn about astronomy in an interactive way.

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See moon phases and planet positions instantly

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Track moon phases, planet positions, and sunrise/sunset times on your Android device with this easy-to-use astronomy app.

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See ISS sighting times for your location tonight

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Find out when and where to see the International Space Station from your location. Get real-time schedules by city or zip code for skywatching tonight.

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Navigate the stars in 3D with friends

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Explore the night sky in a 3D environment with Firmament Trackers, letting multiple users freely navigate and observe stars and celestial objects together.

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Pinpoint your position with celestial navigation tools

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Find your location using the sun, moon, stars, and planets with tools and guides for celestial navigation. Accessible on web, iOS, Android, and macOS.

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Track satellites live on your mobile device

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Track satellites in real time on your phone with Satellite Chasers, a free app that uses U.S. Space Command data for up-to-date locations.

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Explore detailed maps of nearby stars

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Explore a detailed database of nearby stars within 95 light years in the Milky Way, with maps and star info.

skysafariastronomy.com favicon

Simulate and control your telescope from any device

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Explore the night sky, control telescopes, and simulate celestial events with SkySafari's interactive astronomy tools for iOS, Android, and macOS.

greaterskies.com favicon

Design your own custom star map gift

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Create a custom star map showing the night sky from any date and location. Perfect for gifts, keepsakes, or commemorating special moments.

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See what’s in your sky tonight, live

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Explore the night sky with interactive star maps, real-time data on planets and comets, and guides for astronomy enthusiasts of all levels.

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Track satellites live on a global map

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Track satellites live on a world map, see upcoming passes over your location, and get alerts when satellites are visible—all in real time.

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Map sunlight and moonlight for your next photo shoot

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Plan outdoor photography with sun, moon, and Milky Way light maps. See how natural light falls anywhere on earth, day or night, for perfect shots.

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Discover constellations with your smartphone

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Universe2go+ transforms your smartphone into a personal planetarium, letting you explore constellations, planets, and galaxies in the night sky.

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Get real-time audio eclipse timing and guidance

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Solar Eclipse Timer helps you geolocate, calculate eclipse contact times, and get real-time audio guidance to fully experience total solar eclipses.

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Discover asteroid data and mining potential

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Explore a comprehensive database of over 600,000 asteroids with scientific, economic, and mining data, including composition, mass, and orbital details.

Worldwide Starstonesoftware.com Alternatives

moshier.net favicon

Access astronomy software and source codes

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Download astronomy software source codes and tools for ephemeris calculations, star catalogues, and orbital position data, with C language support.

roman.ipac.caltech.edu favicon

Discover cosmic insights with the Roman Space Telescope

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Explore cosmology, exoplanets, and infrared astrophysics with resources and community info on the Roman Space Telescope project.

hirise.lpl.arizona.edu favicon

View stunning high-res images of Mars

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Explore detailed images of Mars from NASA's HiRISE camera, view science updates, and access a vast archive of high-resolution planetary photos.

djm.cc favicon

Find constellations by sky coordinates instantly

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Easily find which constellation contains any sky coordinates with this astronomy tool designed for quick star mapping and constellation identification.

memstar.fr favicon

Find stars and celestial objects with ease

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MeMstar® helps you easily locate celestial objects with a pointing device, making stargazing and astronomy more accessible for everyone.

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Identify stars and constellations instantly

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Explore the night sky with an interactive star map and astronomy tool that helps you identify stars, planets, and constellations in real time.

stellarium-web.org favicon

View the night sky from anywhere in your browser

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Explore the night sky with an interactive online star map that lets you view stars, planets, and constellations from any location, right in your browser.

millimetron.ru favicon

Explore deep space with advanced millimeter-wave telescope

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Russian space observatory project with a 10-meter telescope studying the universe in millimeter and infrared wavelengths.

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View live sky cams and support star sponsorships

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Explore astronomy and weather at Volkssternwarte Hagen with live sky cams, star sponsorships, and educational info in German.

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Plan and safely view the 2024 solar eclipse

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Eclipse2024.org offers expert info and tools to safely view the 2024 total solar eclipse in North America.

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