Question

define black hole?


define phantom?
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Answer 1

Answer:

black hole is a hole in the space that attracts all the planets

Explanation:

pls mark brainliest

Answer 2

A black hole is an area of space with a gravitational field so strong that nothing, not even light, can escape it. That's why black holes appear black. In some cases, black holes are former massive stars that have been crushed to an extreme density during supernova explosions..

A phantom or imaging phantom is a highly specialized object utilized in medical imaging for quality control, equipment calibration, dosimetry and education. ... The use of the name is used interchangeably for each object despite their differences. There are two main type of phantom, anthropomorphic and calibration.

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