Space & the Universe
Physics in Action
Imaging a Black Hole
The black hole selected for imaging resides in the center of the Messier 87 galaxy, 55 million light years away (324 quintillion miles away).
More Physics in Action by Topic »
People in Physics
Interview with Astronaut Don Pettit
We talk to Don about scary moments in space, immigrating to Mars, human spaceflight and more.
More People in Physics by Topic »
Writer's Gallery
Einstein's Dreams Review
Einstein's Dreams takes the reader on a journey through different conceptions of time. What if time stood still? What if time slowed down on the highest mountain peaks? Find out why this modern classic is a must-read for those looking to dabble in physics, philosophy, or psychology.