Science If space is empty, and if temperature measures how fast particles move, then how can space have a temperature?
Observing I’m having trouble centering the objects I want to observe in my telescope. Can you help me?
Science Where is Hewett 1, the largest-known planetary nebula mentioned in “See a star die” (February 2005)?
Science If Mars and Venus could swap places, how much brighter would Venus appear from Mars’ current orbit?
Science The March 2005 issue mentioned a newly discovered stellar neighbor, SIPS 1259-4336. How do astronomers use parallax to determine if a star is a close neighbor of the Sun?
