NASA and European scientists explain how they calculate the probability of the space rock 2024 YR4 impacting our planet, and why it’s not yet time to worry.

The above 40-second video is sped-up footage of the new-found jets flashing briefly near the Sun’s south pole. In reality, the jets flash for around one minute, flinging charged particles at an ...

W.M. Keck Observatory imagery of star system HR 8799 have been time-lapsed. The system hosts four planets that are more massive than Jupiter. Video making & motion interpolation: Jason Wang (UC ...