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:
× 71
Questions regarding electromagnetic radiation in the visible spectrum.
× 10
Questions regarding undesired brightening of the night sky inhibiting observation of astronomical objects.
× 3
the group of galaxies that includes the Milky Way among others.
× 6
Questions regarding the brightness of an object.
× 2
× 10
Questions regarding an event where the Earth goes between the Sun and the Moon and casts a shadow on the Moon.
× 19
Questions regarding magnetic fields.
× 4
× 6
Questions about the "adulthood" of stars. The main sequence is a distinctive band of stars that appears in a color-magnitude plot (known as Hertzsprung-Russell diagram). Stars appear in the main seque…
× 37
Questions regarding Mars, the fourth planet from the sun.
× 27
Questions regarding the property of astronomical objects that determines their inertial resistance and gravitational interaction with other bodies.
× 13
× 7
Questions about Mercury, the first planet from Earth'd sun. Also the smallest major planet in the Solar System,
× 3
× 4
× 22
Questions on objects passing through the atmosphere which leave visible wakes of incandescent material.
× 7
× 53
Questions regarding the Milky Way Galaxy, the galaxy that Earth's solar system is in.
× 142
Questions regarding Luna, Earth's moon and only natural satellite.
× 3
× 6 × 5 × 3
× 11
Questions about observations performed without the aid of any optical instrument.
× 9
Questions regarding the process of assigning an identifying set of characters to an astronomical object.
× 4
Questions regarding the National Aeronautics and Space Administration, the American civilian space agency.
× 16
Questions on celestial bodies that orbit planets.
× 4
Questions regarding the process of accurately finding your location, and getting to another place by planning and following a map.
× 14 × 6 × 13
A collection of ionized gases and dust in interstellar space
× 7
Questions regarding Neptune, the 8th and furthest major planet orbiting Earth's sun.
× 7
Questions regarding a family of extremely low-mass, electrically neutral particles described in the Standard Model of particle physics.
× 22
Questions regarding a degenerate star that is mainly composed of neutrons.
× 8
Questions regarding the theory of gravity as proposed by Newton, in which the force of gravity depends only on the mass of bodies, a constant, and the distance between them, and depends on one equatio…