A) all the answers
B) Nuclear bonding
C) Gravity
D) electromagnetism
E) Nuclear fusion

A) by viewing black holes with powerful telescopes
B) by observing objects and light around black holes
C) by running experiments on the Sun
D) All of these answers

A) when asteroids hit stars
B) when nuclear bombs explode
C) when giant stars explode
D) when comes strike planets

A) In the center of a planet
B) at the center of the solar system
C) at the center of galaxies
D) Inside gas giant planets

A) False
B) True

A) singularity
B) Supernova border
C) pulsar
D) Event horizon

A) Pulsar
B) singularity
C) Iris
D) Supernova

A) iris
B) pulsar
C) supernova
D) singularity

A) True
B) False

A) It spins at a rate faster than light
B) Nuclear reactions at its core
C) It's large size and small mass
D) it's small size and large mass