In January 2025, Venus, Mars, Jupiter, Saturn, Uranus and Neptune were all visible in the night sky. And in February, 2025, ...

We typically think of the Oort cloud as scattered ice balls floating far from the sun, yet still tied to it gravitationally.

The world is watching as NASA tweaks the odds that asteroid 2024 YR4 will hit Earth. But how threatening is YR4, and how does ...

Late or missed menstrual period Late period: 5 or more days late compared to normal menstrual cycle Missed period: no menstrual flow for more than 6 weeks Teen not using any birth control that stops ...