Answer Happy

A nearby star system is found to have a parallax of 100 milli-arcseconds (where a milli-arcsecond is 1 thousandth of an arcsecond). a Every January, we see this: distant stars Every July, we see this: nearby star р As Earth orbits the Sun... d the position of a nearby star appears to shift against the background of more distant stars 1 AU Not to scale July January Part A - How far is the star system from the Earth? Enter your answer in light years. The acceptable variation of the answer is 2%. EVO A¢ ? lyr Submit Request Answer Part B - What other single piece of information is required to find the luminosity of the star? O size of the star temperature O spectral type of the star O colour O apparent brightness O none of the above Submit Request Answer