A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

Type to find tags:
A clockwork device that produces a small scale model of the orbits of objects in the solar system
Questions related to Kuiper Belt Objects that exist in an annulus from 30AU to approximately 50AU from the Earth's Sun.
the group of galaxies that includes the Milky Way among others.
about the lack of evidence for alien life, despite the growing evidence that suitable planets are reasonably plentiful.
Questions regarding Callisto, an icy moon of Jupiter.
Questions regarding chthonians, a hypothesised class of exoplanets that are the remnant cores of hot Jupiters.
track and display the current time.
Questions about patterns formed by group of prominent stars in the night sky.