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SpaceEngine is a program that simulates the entire observable universe in 3D, combining real astronomical data with procedural generation algorithms. Users can explore, observe, and create celestial objects, and fly spacecraft in a realistic model of orbital mechanics and atmospheric flight.
Typical DSO survey in Celestia. Celestia versions 1.6.3 and under display the Hipparcos Catalogue (HIP) of 118,322 stars and a compiled catalogue of galaxies, while version 1.7.0 includes stars from the Tycho-2 Catalogue alongside the Hipparcos stars, with some data from Gaia, increasing the star count to over 2 million. [23]
A planet is a large, rounded astronomical body that orbits a star or stellar remnant. Learn about the history, theory, and diversity of planets, from the eight in the Solar System to the thousands of exoplanets discovered outside it.
Looking up into the night sky, it can be difficult to comprehend the vastness of the space that surrounds the Earth — and the impressive size of the various stellar and planetary bodies on display.
Learn about the Sun and the objects that orbit it, including the eight planets, the nine dwarf planets, and the small bodies such as asteroids, comets, and moons. Explore the formation, evolution, and features of the Solar System and its place in the Milky Way galaxy.
NASA's Eyes is a suite of applications that render realistic views of planets, spacecraft and other features in the Solar System based on real data from JPL. Eyes on the Solar System is one of the products that allows users to explore the Solar System with various modes and modules.
The Sagan Planet Walk has inspired the creation of other scale-model Solar Systems in the United States. The Delmar Loop Planet Walk in St. Louis, Missouri: "In 2006, I became aware of the Sagan Planet Walk in Ithaca, NY, and as an amateur astronomy buff, I found the idea of a scale model solar system to be a fascinating concept.
Learn about the history and origin of the symbols for the classical planets, the major planets discovered in the modern era, and the asteroids and centaurs. See how the symbols evolved from ancient Greek and Egyptian sources, alchemical and astronomical signs, and medieval codices.