If a star has a parallax of 0.05, then its distance in light-years is about
A) 6.4 light-years.
B) 12.7 light-years.
C) 20 light-years.
D) 65 light-years.
E) 100 light-years.
Question 2
How is a technical civilization defined?
A) a civilization that can avoid self-destruction for long periods
B) a civilization that can communicate over interstellar distances
C) a civilization that has the ability to store and process information
D) a civilization that has developed interplanetary space travel
E) a civilization that can construct tools out of raw materials
Major moons of Uranus in order of increasing distance (left to right), at their proper relative size
Air flows through the PCV valve during idle, cruising, and light-load conditions.
Black Hole and Companion Star
Carbon Dioxide Concentrations for 400,000 years
In Canada, 2/3 women and over 1/2 of men 55 to 64 years of age are grandparents
Light-independent reactions in C4 plants