Human Spaceflight, Robotic Spaceflight, Solar System Rusty Schweickart: From the Apollo program to the asteroid threat
The Sun The Sun has an 11-year sunspot cycle. Do we know if other stars have similar lengths, or is our star unique?
Stars Proxima Centauri is a red dwarf star, so would it appear red from the surface of an Earth-like planet in that star’s habitable zone?
Exoplanets, Planets, Robotic Spaceflight, Solar System If my dog Pluto were sitting on that planet July 14, would he be likely to catch a glimpse of New Horizons as it zooms by?
Deep-Sky Objects, Observing The Silver Streak Galaxy (NGC 4216), spiral galaxy M100, and barred spiral galaxy M91
Exoplanets, Planets We often read of discovering exoplanets. How far away from Earth would we be “discovered” by another civilization with our current detection technology?
