Outer Space

The technology we (or aliens) need for long-distance interstellar travel
How NASA is planning to prevent a Martian plague 
This logarithmic view of the Universe will blow your mind
There are more galaxies in the Universe than even Carl Sagan ever imagined
The Universe is flat. Here’s what that teaches us. 
Newly discovered exoplanet may be first covered in liquid water 
A new nova disappeared faster than ever, and an even bigger cosmic catastrophe is coming 
Listen to the sound of a black hole, remixed by NASA
NASA-funded scientist says “MEGA drive” could enable interstellar travel
Black hole mergers obey the laws of thermodynamics