A light-year is the distance light travels in a year, 5.9 trillion miles (9.5 trillion km). White dwarfs are among the most compact celestial objects. Stars with up to eight times the mass of our sun ...

White dwarfs are among the most compact celestial objects. Stars with up to eight times the mass of our sun appear destined to end up this way. They eventually burn up all the hydrogen they use as ...

Diver captures rare footage of giant sunfish off Cabo San Lucas. The 5,000-pound fish dwarfed the diver in a "once-in-a-lifetime" encounter. CABO SAN LUCAS, Mexico - Dramatic video shows just how ...

WASHINGTON, April 7 (Reuters) - Astronomers have spotted two hefty white dwarf stars - highly compact stellar embers - orbiting close together that appear destined to die in an extraordinarily ...