Some stars pulsed, like the cepheid variables, but in an orderly way.
We will install it in the 'S Doradus' and the 'cepheid' as a weapon.
Shapley has estimated the distances of many of these bodies, which contain a large number of variable stars of the cepheid type.
The "cepheid," her sister ship, had gone along on seven of the trips, and added to the total.
And then for an instant, the cepheid's bright wink was dulled; eclipsed.
They started down the corridor, and came presently to the huge locks where the "S Doradus" and the "cepheid" were berthed.
Any of a class of variable stars whose luminosity fluctuates with an extremely regular period. There is a strong correlation between the absolute magnitude of a Cepheid's luminosity and its period. By comparing the apparent magnitude of a Cepheid to the absolute magnitude corresponding to its period, it is possible to determine fairly accurately how distant the Cepheid is from Earth. Also called Cepheid variable.