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Questions regarding a theoretical 'tunnel' through spacetime which could potentially allow time travel.
A map of the surface features of something.
Questions regarding Triton, the largest moon of Neptune.
Questions about Trojan Asteroids, asteroids that co-orbit major planets.
Questions about flow regime in astrophysical gas characterized by chaotic properties.
Questions related to the unit of measurement, parsec, which is approximately 3.26 times the distance of a light year.
A clockwork device that produces a small scale model of the orbits of objects in the solar system
Questions regarding chthonians, a hypothesised class of exoplanets that are the remnant cores of hot Jupiters.
Questions regarding Callisto, an icy moon of Jupiter.
a star with an enormous mass and luminosity, showing signs of a very high rate of mass loss.
about the lack of evidence for alien life, despite the growing evidence that suitable planets are reasonably plentiful.