CelesTrak is a 501(c)(3) non-profit that provides orbital data and related resources to the space community. Its site offers NORAD GP element sets, a satellite catalog, conjunction reports, GPS data and space weather data. It notes that 5-digit catalog numbers ran out on 2026-07-11, so newly cataloged objects with 6-digit numbers lack GP data in TLE format.
Solar System Scope is an online 3D simulation of the Solar System and night sky in real time, showing the Sun, planets, dwarf planets, comets, stars and constellations. It also offers a free model of the Solar System and night sky with accurate positions of objects. A desktop version and an Android app are available.
A site for tracking the location of the International Space Station, showing real-time ISS location, altitude, velocity and coordinates. Visitors can sign in with Twitter to get visible passes and notifications for their location.
The Apollo Image Atlas is an online collection of photography from the Apollo-Saturn missions. It includes almost 25,000 lunar images from orbit and from the moon's surface, along with photographs of the earth, astronauts and mission hardware. Images can be browsed by catalog or searched by feature name, coordinate or description.
In-The-Sky.org provides astronomy news and interactive guides to the night sky. The site offers a planetarium, sky guide, weather forecast, object search and catalogs, an orrery and 3D universe views. It also lists events such as oppositions, occultations and meteor showers, with rise and set times shown for a selected location.
OMG SPACE is a series of visuals created as a graphic design thesis project to illustrate the true scale of the solar system. All planets, including the sun and dwarf planets, are shown to scale, as are their distances from the sun, at a ratio of 1:647. Created in 2011 by Margot Trudell, the site's data is only current to early 2011, with minor design and development updates in 2015.
WorldWide Telescope is a suite of free and open source software and data sets that combine to create scientific visualizations and stories. Its ecosystem includes a Windows application, an interactive web app, and toolkits for Python and TypeScript/JavaScript.
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Solar System Scope is an online 3D simulation of the Solar System and night sky in real time, showing the Sun, planets, dwarf planets, comets, stars and constellations. It also offers a free model of the Solar System and night sky with accurate positions of objects. A desktop version and an Android app are available.
A site for tracking the location of the International Space Station, showing real-time ISS location, altitude, velocity and coordinates. Visitors can sign in with Twitter to get visible passes and notifications for their location.
The Apollo Image Atlas is an online collection of photography from the Apollo-Saturn missions. It includes almost 25,000 lunar images from orbit and from the moon's surface, along with photographs of the earth, astronauts and mission hardware. Images can be browsed by catalog or searched by feature name, coordinate or description.
In-The-Sky.org provides astronomy news and interactive guides to the night sky. The site offers a planetarium, sky guide, weather forecast, object search and catalogs, an orrery and 3D universe views. It also lists events such as oppositions, occultations and meteor showers, with rise and set times shown for a selected location.
OMG SPACE is a series of visuals created as a graphic design thesis project to illustrate the true scale of the solar system. All planets, including the sun and dwarf planets, are shown to scale, as are their distances from the sun, at a ratio of 1:647. Created in 2011 by Margot Trudell, the site's data is only current to early 2011, with minor design and development updates in 2015.
WorldWide Telescope is a suite of free and open source software and data sets that combine to create scientific visualizations and stories. Its ecosystem includes a Windows application, an interactive web app, and toolkits for Python and TypeScript/JavaScript.
