Today marks the June solstice, as the Sun passes highest in the sky for observers across the northern hemisphere. Here's our post on 'all things solstice,' with facts, lore and more.

While NASA has had a long and storied history of building and testing experimental aircraft – called X-planes -- it has been almost a decade the space agency has developed any new aircraft. But an initiative announced earlier this year as part of the new budget has NASA back designing, building and flying a new series of X-planes, with the goal of creating more "green" aviation technologies that can then be utilized by the aeronautics industry.

The Saturn V rocket that was supposed to launch Apollo 19 to the Moon in 1973 has found a new home at the Infinity Science Center in Mississippi.

Earth has a new dance partner, a quasi-moon named 2016 H03.

As we've learned, black holes can evaporate over time thanks to the creation of virtual particles at the edge of the event horizon. Dr. Paul Matt Sutter returns to help us make sense of the science.

The Additive Manufacturing Facility, or 3D printer, on-board the ISS has made its first tool.

CAPE CANAVERAL AIR FORCE STATION, FL — Nearly perfect weather greeted the blastoff of a nearly identical pair of xenon propulsion commercial telecom satellites carried to orbit today, Wednesday, June 15, by an upgraded SpaceX Falcon 9 rocket from the Florida space coast.

With the announcement of the second detection of elusive gravitational waves, scientists hope this is just the beginning of a new era of understanding our Universe.

A fossilized meteorite from a quarry in Sweden is a new type of space rock that's different from other meteors.

CAPE CANAVERAL AIR FORCE STATION, FL — Less than three weeks after their last launch and landing attempt involving a Thai payload, SpaceX is set to continue the firms rapid fire pace of satellite deliveries to orbit with a new mission involving a stacked pair of all-electric propulsion commercial comsats that are due to liftoff tomorrow, Wednesday morning.

The coming month is a great time to cross Pluto off of your observing life list, with our complete guide to Pluto at opposition for 2016.

Mammals were well on their way to dominance long before an asteroid strike was the death-blow for dinosaurs.

CAPE CANAVERAL AIR FORCE STATION, FL — A top secret eavesdropping satellite constructed to support America's national defense plowed a dazzling path to orbit Saturday riding atop the immense firepower of the mightiest rocket in the world - the triple barreled Delta IV Heavy powerhouse.

CAPE CANAVERAL AIR FORCE STATION, FL — The world's largest rocket was ready to rumble with a secret spy satellite for the NRO until Thursday's stormy weather across the so-called 'sunshine state' postponed the engines roar by 48 hours to Saturday, June 11.

A decade of high-tech scanning has confirmed that the Antikythera Mechanism is an ancient astronomical computer.