What is the minimum mass requires for a star?

The question asked in Olber’s Paradox of cosmology is

Which of the following types of galaxies are reddest in color?

Which is the classification given to a galaxy with a small nuclear bulge, and loosely wound arms with no bar through the nuclear bulge?  

Lenticular galaxies are similar in structure to a spiral galaxy. Which feature are they missing?

How many fundamental forces are known in science?

The masses of stars are determined through the study of?

List the Eras of the Big Bang Theory in chronological order. ____ era ____ era ____ era ____ era ____ era ____ era ____ era ____ era

The letters G U T  from the GUT Era stand for Grand Unified Theory. This theory explains how 3 of the fundamental forces are indistinguishable. Which three forces does it describe?

There is star formation in Elliptical Galaxies.