Even a galaxy teeming with star-hopping alien civilizations should still harbor isolated, unvisited worlds—and Earth might be among them
Archival Cassini images reveal a glinting surface and a seasonal property
A new, epic voyage through all known scales of reality charts the outer limits of existence, from the edge of the observable universe to the subatomic realm
What makes a total solar eclipse seem so strange and awe-inspiring?
To do so, they looked to a second black hole orbiting the first
The Cassini mission's third-from-last flyby of the icy moon Enceladus reveals that a highly complex network of thin cracks covering the surface extend all the way into the northern polar region...
To know whether life exists beyond Earth, we must come to terms with our own significance in the universe. Are we uniquely special or merely mediocre?
The matter-eating beast at the center of the Milky Way may actually account for Earth's existence and habitability
Most planetary scientists will tell you that the objects they study are more complex and harder to categorize than almost anything else out there in the universe.