15) What is the luminosity and color of the star Betelgeus?

16) Which star group has an average luminosity of 0.01-0.001 and includes Procyon B?

  15)Luminosity of Betelgeusof 100,000 times the Sun.

color of Betelgius red

16) White dwarf star group

Explanation:Betelgeuse a  red super giant  also known as  Alpha Orion is ( the 2nd brightest naked eye star in the constellation Orion and the  9th brightest star in the entire sky with absolute magnitude is -5.14 and its distance is 428 light years having surface temperature of 3500° Kelvin and a luminosity 140,000 times the Sun.

Betelgeuse is easy to spot in the night  because of its proximity to the belt of Orion

16)white dwarf star group,also called a degenerate dwarf, is a very dense stellar core made up of electron-degenerate matter with mass liken to that of the sun.It is characterised with very low luminousity due to the emmisson of stored thermal energy. An example is the Procyon B , an alpha star located in the constellation of Canis Minor.

yes, water is wet, just as it makes other things wet, it is wet itself, kinda like ice, when ice is in water, the ice makes water cold, and ice is cold, therefore with that example, water is wet