Like a celestial parade across the cosmos, five bright planets are lighting up the night sky and visible with the naked eye ...

New research shows that star activity can distort exoplanet measurements, affecting size, temperature, and atmosphere ...

Stargazers will be treated to a rare alignment of seven planets on 28 February when Mercury joins six other planets that are already visible in the night sky. Here's why it matters to scientists.

Temperamental' stars that brighten and dim over a matter of hours or days may be distorting our view of thousands of distant planets, suggests a new study.

While the composition of gas and dust in a molecular cloud is fairly uniform, everything changes once a star begins to form.