Due to their proximity to Earth, minimoons are prime candidates for exploration. Now, some scientists want to use these tiny satellites to push humanity further into the cosmos.
The underground volcano near Grindavík has begun its third major eruption in three months, opening up a 2-mile-long fissure that is pumping out large amounts of lava and ash.
A distant comet trapped in orbit between Saturn and Uranus is accompanied by a transforming disk of icy dust, new observations reveal.
