100 6. what is a black 7. quasar is short for… 8. how much energy do quasars give 9. what gives a star its

6) A black hole is a part of space that has such a strong gravitational pull that nothing can escape from inside the black hole. 

7) A Quasar is a very large celestial object that gives off massive amounts of energy. There is a theory that Quasars contain gigantic black holes in them but it is still yet to be proven. 

8) The energy of a Quasar ranges from 1 trillion to 25 trillion of our sun.

9) Stars get their light due to a nuclear reaction that happens inside the star. 

Essential for a scientist to do for credibility

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.

Gravitational force i believe