The system, observed using the European Space Agency's Cheops space telescope, consists of four planets — two rocky and two ...

For decades, scientists have believed that planetary systems typically form with rocky planets close to their star and ...

Add Yahoo as a preferred source to see more of our stories on Google. The Hubble Space Telescope time-lapse captured footage of Jupiter, Saturn, Uranus and Neptune. Credit: SCIENCE: NASA, ESA, Amy ...

Lava tubes aren't new to our solar system; they've hinted at volcanic pasts on Mars and the Moon. But spotting them ...

A recent analysis of decades-old radar data from Venus has revealed evidence of a large subsurface cavity caused by volcanic ...