[wddkltib] Some solar system distances in light units

The speed of light gets used in the unit the light year to express distances between stars.  The speed of light ca

[sbmdhvwl] Many old neutron stars

Hypothesize that our galaxy is old, so has formed stars since the earliest that star formation could occur.  The e

[burqtksz] Proper motion and apparent magnitude

Among stars you can see (which depends on latitude on earth, sky conditions, and power of your telescope if any), which