Hubble revealed a universe of galaxies that existed beyond ours — but he couldn't have done it without a little help.

Leavitt's work with variable stars led to her most important contribution to the field: the cepheid variable period-luminosity relationship. By intense observation of a certain class of variable ...

Trump White House press secretary Karoline Leavitt earns praise from conservatives on social media regarding her first ...

This was dubbed the "period-luminosity relationship." Other astronomers realized the significance of Leavitt's work: the relationship could be used to work out distances to stars. While a student ...

Karoline Leavitt is the new White House press secretary under Donald Trump. Her appointment is a historic first. Here's what ...

"Karoline Leavitt is a rock star," actor James Woods posted on X. "These next four years are going to be sublime." Individuals Receiving Direct Assistance Won't Be Impacted By Federal Funding Freeze, ...