Spacecraft navigation uses X-rays from dead stars

The remnants of a collapsed neutron star, called a pulsar, are magnetically charged and spinning anywhere from one rotation per second to hundreds of rotations per second. These celestial bodies, each 12 to 15 miles in diameter, ...

From dust to planet: How gas giants form

Gas giants are made of a massive solid core surrounded by an even larger mass of helium and hydrogen. But even though these planets are quite common in the Universe, scientists still don't fully understand how they form. ...

US watchdog upholds SpaceX's Moon lander contract

NASA did not violate regulations when it decided to give SpaceX the sole contract to build a Moon lander, a watchdog said Friday, in a ruling that denied challenges by competitors Blue Origin and Dynetics.

View from Juno during its flyby of Ganymede and Jupiter

Visualizations shape how we perceive space exploration. Whether it's the Pale Blue Dot, the Hubble Ultra Deep Field, Earthrise, or any other myriad images captured as part of this great endeavor, they all help inspire the ...

Earth's meteorite impacts over past 500 million years

For the first time, a unique study conducted at Lund University in Sweden has tracked the meteorite flux to Earth over the past 500 million years. Contrary to current theories, researchers have determined that major collisions ...

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