"It's not Swiss watch precision," researchers say.
Light from the jets can outshine entire galaxies.
When massive stars come to the end of their life cycles, they self-destruct in a cataclysmic final explosion.
Dark matter could make up around 80 percent of the mass in the universe.
The astrophysicist most recently chimed in about "Titanic." Is he veering away from his strictly science-based reviews?
"Bringing science to the people brings people into science. This matters to me, to you, to the world as a whole," Hawking has said of the award.
The "most mysterious star in the universe" has been acting up, and astronomers are excited at the prospect of finally discovering what exactly is going on.
Scientists showed the potential habitability of the planet under different atmospheric conditions and orbits using a state-of-the-art model.