A brief description of a white dwarf star, which is the end-state of a star that is less than 8 times the mass of Sun. 

A brief description of how we use the HR Diagram and the main sequence to measure the ages of stars in groups and clusters.

A brief description of seeing and the resolving power of a telescope.

A brief description of the true nature of black holes as highly localized sources of gravity and not cosmic vacuum cleaners.

A brief description of what we think was here before the Big Bang. Short answer is that we don't know since "Science" is not equipped to answer questions where no data or information is available.

A brief description of my personal point of view regarding the possibility that UFOs harbor extraterrestrial beings visiting Earth.

A brief description of the structure of the Milky Way galaxy - our galactic home.

A brief description of the Hubble Law, now more formally known as the Hubble-Lemaitre Law.

A brief description of starburst galaxies and why they are in star formation overdrive.

A brief description of whether the findings of science are _absolutely_ true. It could also have been entitled “Are Scientific Results Absolute?” and “Is the Scientific Method Absolute?”