On Sunday, the craft that explored Pluto successfully executed the 2nd of 4 maneuvers designed to aim it toward a small Kuiper Belt object called 2014 MU69.
Evidence that Earth was hit by two solar storms - 10 times larger than those observed recently - 1,000 years ago. If they occurred today, they'd have devastating effects on power supplies, satellites and communications.
SOHO - Solar and Heliospheric Observatory - is the greatest comet-discoverer of all time. It has found 3,000 comets ... but our sun has destroyed nearly all of them.
New evidence suggests that life on Earth began 300 million years earlier than previously documented, pushing the origin of life close to when the planet formed.