NGC 4945, a beautiful spiral galaxy over 12 million light-years away, hides a ferocious secret: a ravenous black hole at its ...

Voyager 2 spent over four decades journeying through the outer solar system. In 2018, it became only the second human-made object to enter interstellar space. This video explores the milestones of its ...

A journey into interstellar space might do just fine, providing a technology shakedown and an incremental step toward the stars, just as the suborbital Mercury flights of Alan Shepard and Gus ...

In the space around galaxies ... Survey programs have confirmed that this material forms an intergalactic mist of hydrogen, expelled further from active galactic cores than previously believed.

The spacecraft, now travelling through interstellar space more than 15 billion miles ... but they have continued their long ...