Planetesimals are among the first solid bodies to form as dust and pebble-sized material clumps together under gravity. Much like snowflakes compressed into a snowball, they are loose aggregates ...

A subtle gravitational-wave “hum” from merging black holes may help settle the cosmic fight over how fast the universe is ...

A NASA animation has sized the biggest black holes known to scientists, including one that has the mass of 66 billion Suns.

Scientists have long know many objects floating at the solar system's out edges resemble snowmen, but the reasons why were never clear. Now a student at Michigan State University has created the first ...

A new study on Saturn's largest moon, Titan was conducted by SETI Institute. Scientists believe Titan could be the result of a colossal moon merger billions of years ago, potentially explaining its ...