Science When astronomers talk about all the dust and gas in the universe, what kind of “dust” are they actually talking about?
Robotic Spaceflight If we know the path that both the Milky Way and our solar system have been on, could Hubble not look back on that path and see both at some point in the past?
Stars Vega is said to rotate at about 87 percent of the speed that would tear it apart. If it ever reached that speed, what would an observer on Earth witness?
Exoplanets, Planets, Solar System Please explain why the total solar eclipse in August 2017 starts on the west coast and progresses eastward.
Exoplanets, Planets, Solar System Couldn’t Hyperion’s low density and spongy texture be better explained by it being a captured comet?
