11 free sites

Free Space & Astronomy

11 free sites in Space & Astronomy. Every one was opened and checked before it went on the list.

Stellarium Web stellarium-web.org Top pick
A planetarium in the browser. See the night sky from any place and time, with stars, planets and constellations labeled.
NASA's Eyes science.nasa.gov Top pick
NASA's 3D apps that run in the browser. Fly alongside real spacecraft, planets and asteroids placed where NASA's data says they are.
APOD apod.nasa.gov Top pick
NASA's Astronomy Picture of the Day, running since 1995, each with a short explanation by an astronomer.
Heavens-Above heavens-above.com
Set your location and it tells you when the International Space Station and other satellites pass overhead. Also has star charts.
In-The-Sky.org in-the-sky.org
A calendar of what you can see in the night sky from where you live: planets, meteor showers, eclipses and comets, with sky charts.
NASA Exoplanets science.nasa.gov
NASA's hub for planets outside our solar system, with a running count of confirmed finds and a catalog you can browse.
NASA Image and Video Library images.nasa.gov
Search NASA's free archive of images, videos and audio from its missions and research.
NASA Solar System science.nasa.gov
NASA's guide to the planets, moons, dwarf planets and comets of our solar system, with facts, images and mission news.
SpaceEngine spaceengine.org
A 3D universe you can fly through, from nearby planets to far galaxies, built on real star catalogs. A paid Windows app, sold on Steam.
SpaceWeather.com spaceweather.com
A daily news page on the Sun and near-Earth space: solar flares, aurora forecasts, sunspots and asteroid flybys.
The Scale of the Universe 2 htwins.net
Zoom from the smallest known particles out to the whole observable universe, with a note on each object.

Free Space & Astronomy

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