Red dwarf
Hubble measured the size of the nearest Earth-sized exoplanet
This alignment, called a transit, opens the door to follow-on studies.
Evaporating planet getting the hiccups, sees Hubble
A young planet whirling around a petulant red dwarf star is changing in unpredictable ways orbit-by-orbit.
Astronomers found a rare exoplanet suited to probe alien life
A nearby potentially habitable Earth-mass exoplanet.