Henrietta Leavitt joined the Harvard College Observatory as a volunteer in 1895. She was appointed to the permanent staff in 1902, and eventually became chief of the photometry department. She worked ...

Using ESO’s Very Large Telescope Interferometer (VLTI) at Cerro Paranal, Chile, and the CHARA Interferometer at Mount Wilson, California, a team of French and North American astronomers has discovered ...

Using ESO's Very Large Telescope Interferometer (VLTI) at Cerro Paranal, Chile, and the CHARA Interferometer at Mount Wilson, California, a team of French and North American astronomers has discovered ...

Scientists have clocked the speed of Cepheid stars -- 'standard candles' that help us measure the size of the universe -- with unprecedented precision, offering exciting new insights about them.

The VISTA telescope observed the Trifid Nebula, identifying previously hidden variable stars. These variable stars exhibit a period-luminosity relationship, meaning their intrinsic brightness is ...

This is a preview. Log in through your library . Abstract A newly determined radius value, based on a homogeneous and accurate data set and two independent methods, is used together with the currently ...

A new map of the Milky Way confirms something researchers have long suspected: this galaxy is warped. That’s right. The abiding sense of cosmic disarray you’re feeling is not just a sign of the times ...

The General Catalogue of Variable Stars gives periods of slightly less than three-quarters of a day for the stars NO Cas and CN Tau. However, new photometry demonstrates that their periods are ...

The universe is moving too fast and nobody knows why. Back in the early years of the universe, right after the Big Bang, everything blasted away from everything else. We can still see the light from ...