The closest black hole to Earth was thought to be 1,560 light-years away - but a new study suggests there could be one around 150 light-years away.
The claim of a gravitational wave background suggests the universe is constantly roiled by violent events that happened over the past 13 billion years.
So many missions to the planets and big moons. So few to the asteroids.
SwRI?s Levison, Olkin lead the mission to Jupiter?s Trojan asteroids. NASA?s Lucy spacecraft is encapsulated in a protective fairing atop an Atlas V rocket, awaiting its 23-day launch window to open on October 16. All is go for the Southwest Research Institute-led mission to begin, as the spacecraf