Select the two pieces of evidence that support the
message you identified: "Black holes are
incredibly powerful cosmic forces."
Black holes consume massive objects,
including stars and gas clouds.
Black holes are isolated and invisible for
most of their existence.
As far as I know, nobody has ever been eaten
by a black hole, but there is compelling
evidence to suggest that black holes in the
universe routinely dine upon wayward stars
and unsuspecting gas clouds. As a cloud
approaches a black hole, it hardly ever falls
straight in.... As the cloud layers spiral closer
to the event horizon they heat up, from
internal friction, to upwards of a million
degrees - much hotter than any known star.
The gas glows blue-hot as it becomes a
copious source of ultraviolet and x-ray
energy. What started as an isolated, invisible
black hole (minding its own business) has
A black hole causes gas clouds to become
hotter than any known star.
A black hole has never consumed a person,
as far as we know.
