That We Can See Two Images of the Same Quasar

question 15

Short Answer

That we can see two images of the same quasar is due to a(n)________ lens formed by amassive galaxy lying in front of the quasar.

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Definitions:

Eutherian Mammal

A type of mammal characterized by complex placental development, giving birth to live young at a relatively developed stage.

Primates

An order of mammals including humans, apes, monkeys, and prosimians, characterized by high intelligence and dexterous hands.

Convergent Evolution

The process by which organisms not closely related independently evolve similar traits as a result of having to adapt to similar environments or ecological niches.

Placental

Pertaining to the placenta, an organ that develops in the uterus during pregnancy that provides oxygen and nutrients to and removes waste materials from the developing fetus.