Stark broadening, the widening of spectral lines due to the perturbing influence of electric fields from electron collisions, plays a pivotal role in the analysis of stellar atmospheres. This ...

The hunt is on for terrestrial exoplanets in habitable zones, and some of the most promising candidates were discovered almost a decade ago about 40 light-years from Earth. The TRAPPIST-1 system ...

Labs, D. The energy flux of the sun.--Böhm-Vitense, E. Model stellar atmospheres and heavy element abundances.--Hunger, K. Properties and problems of helium stars.--Baschek, B. Abundance anomalies in ...

The most massive, hottest stars in the Universe are not as hot as we thought, according to new research by NASA-sponsored astronomers. The result was obtained by comparing a sophisticated new model of ...

Deep in the frozen heart of Antarctica, the South Pole Telescope has been watching one of the most extreme neighborhoods in our galaxy, and it's just caught something extraordinary happening there.

Scientists have devised a new method for mapping the spottiness of distant stars by using observations from NASA missions of orbiting planets crossing their stars’ faces. The model builds on a ...