Stars How can we tell if a star belongs to a star cluster or is in the space between the cluster and the observer?
Cosmology Why isn’t dark energy considered the “fifth force” in the way gravity, electromagnetism, weak nuclear, and strong nuclear are forces?
Exoplanets Ask Astro web extra: Has anyone pointed a telescope toward Alpha Centauri to see if there are planets only 4 light-years away?
Exoplanets Ask Astro web extra: Do Kepler’s laws apply to all extrasolar planet systems or just our solar system?
Science Ask Astro web extra: Will all white dwarfs, regardless of the class of star that produced them, eventually become black dwarfs?
