The origin of super-Earths and sub-Neptunes has been revealed in a system of four young planets that are dramatically losing ...

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 ...

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 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 ...

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 ...

The search for habitable worlds beyond the solar system now faces a more technical obstacle than distance: uncertainty in the ...

Equatorial slices of the magnetic field (nT is nanoteslas) for space inside and at Trappist-1e (left) and for rotation 2016 of the sun at the same distance (right), as measured by the Carrington ...

An alien world near Earth is being trailed by a gigantic tail, stretching longer than 40 Earths as it closely circles its home star. The enormous structure, which is made up of gas leaking from the ...

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 ...