Using just the technology in your pocket, you can gauge the velocity of the space station as it zips across the night sky.
This amazing soccer trick has gone viral. But does it hold up to the laws of physics?
Cosmologists want to know how fast the universe is growing, but their data doesn’t match predictions. Wendy Freedman thinks red giant stars can help.
She mapped Apollo 11’s path to history. Now, her legacy lives on in the trajectories of future spaceflights—including the moon landing planned for 2024.