NASA said the comet will make its closest approach to the sun in late October, scooting between the orbits of Mars and Earth ...

More than $10 billion in funds are included in Trump’s tax and spending bill for NASA programs previously targeted by the president after Sen. Ted Cruz led a Senate amendment to rescue them.

The landscape is stark, dark and dramatic, formed by a series of eruptions in the last 16,000 years that have stacked layer ...