Time-domain astronomy is the study of how astronomical objects change with time. Changes may be due to movement or physical changes in the object itself. Examples include pulsar variability, and the ...

Meteoritics is the study of meteorites — solid parts of asteroids or comets that have landed on another celestial body, notably (but not limited to) the Earth. Measuring the composition of meteorites ...

In this case, the α-parameter can only be used to provide an estimate of the PN visibility lifetime within the limiting magnitude of the survey. Roth et al. (2021) developed the so-called differential ...