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:
× 12
Questions about the complete or partial blocking of the sun by the moon.
× 12
Questions about computer programs that assist modeling and observing the dynamics of astronomy.
× 12
Questions regarding two objects colliding into each other with considerable force.
× 12
× 12
Questions about the water molecule (composed of two atoms of hydrodgen and one atom of oxygen) and its detection in celestial objects.
× 11
Questions regarding the material at or near the center of an astronomical object.
× 11
Questions regarding the Hubble space telescope, a scientific telescope on a satellite orbiting Earth.
× 11
Questions about spacecraft journeying to other stellar systems.
× 11
Questions regarding gravitationally bound systems of hundreds to thousands of galaxies as well as interactions between such systems.
× 11
Questions about the "Goldilocks Zone" around a parent star where conditions are just right for the potential of life developing.
× 11 × 11
Questions regarding the physical dimensions of a celestial object.
× 11
Questions regarding Albert Einstein's theory that posits, among other things, the equivalence of mass and energy.
× 11 × 11
Questions involving a star along with all celestial material in its sphere of influence.
× 11
Questions regarding the large "cloud" of small bodies that forms a sphere around the solar system.
× 11
Questions about reflecting telescopes using a concave primary mirror and a flat diagonal secondary mirror.
× 11 × 10
× 10
Questions about observations performed without the aid of any optical instrument.
× 10
Questions about rings of debris that encircle the equatorial regions of some planets.
× 10
Questions regarding the former 9th (now dwarf) planet Pluto.
× 10
Questions about the outermost layer of a body.
× 10
× 10 × 10 × 10
Questions related to techniques and equipment related to amateur to professional astronomical photography.
× 10
× 9 × 9
an object that orbits another object. In space, satellites may be made by man, or they may be natural. Most man-made satellites also orbit the Earth, but some orbit other planets, such …
× 9 × 9
Questions about patterns formed by group of prominent stars in the night sky.
× 9
× 9 × 9
Questions regarding undesired brightening of the night sky inhibiting observation of astronomical objects.
× 9
Questions related to earth processes or related processes and principles.