Stars Astronomers know the fate of Sun-like and massive stars, but what about the majority of stars — the M-class red dwarfs? Will they also become giants or just flicker out?
The Moon How is it that in space, despite the Sun’s presence, the surroundings look black? Apollo photos show a black sky, even with strong sunlight on the surface.
Alien Life The SETI Institute is after alien signals. Assuming another world is beaming a 1-million-watt radio signal in our direction, how far away can that source be before the signal is lost in intergalactic noise?
Exoplanets, Planets, Solar System Is Jupiter’s Moon Amalthea ever visible in amateur instruments? If so, what aperture and magnification are needed, and when is a good time to try?
Stars I read that once every second, somewhere in the universe a massive star ends its life as a supernova. How does that compare to the rate of new star formation?
Exoplanets, Human Spaceflight, Planets, Robotic Spaceflight, Solar System Why won’t the new Horizons spacecraft stop or slow down when it gets to Pluto?
Human Spaceflight Why doesn’t the International Space Station rotate to create artificial gravity like stations in the movies?
