Scientists have discovered over 6,000 planets that orbit stars other than our sun, known as exoplanets. More than half of ...

Research into Jupiter’s moons shows Io and Europa did not evolve apart but formed with opposite compositions from the ...

For decades, the number of planets seemed settled and unquestioned. Then definitions changed, discoveries multiplied, and certainty disappeared. The issue was never distance or size alone, but ...

Using NASA's Transiting Exoplanet Survey Satellite (TESS), an international team of astronomers has discovered a new ...