Do you know the difference between a pulsar and a quasar? Take the quiz!
Have you ever wandered how galaxies form, or what happens to a star at the end of its life? Learn more about the mysteries, wonder and pure magic of outer space with our pulsars and quasars quiz!start quiz
Question 1 of 20
Which of the following starts off as a neutron, or collapsed star?
... A collapsed star that emits radiation is known as a pulsar.
Question 2 of 20
Which of the following originates as a large galaxy with a black hole in the center?
... Quasars can be described as ancient galaxies with black holes in the center.
Question 3 of 20
Which of the following consists primarily of electrons?
... Quasars consist of electrons that produce a magnetic field.
Question 4 of 20
Which of the following consists of tightly packed neutrons?
... Pulsars consist of tightly packed neutrons.
Question 5 of 20
When scientists discovered pulsars in 1967, what did they suspect that they were detecting?
... When scientists first detected pulsars, they thought they had discovered alien life.
Question 6 of 20
Which of the following is by far the brightest type of object in the universe?
... Quasars are the brightest objects in the universe by a significant margin.
Question 7 of 20
Which are older, pulsars or quasars?
... Quasars are billions of years old, and they are much older than pulsars.
Question 8 of 20
Which of the following may resemble a lighthouse due to its intermittent light?
... Pulsars produce pulsing light, while quasars remain fairly constant in appearance.
Question 9 of 20
Which of the following provides clues about the earliest origins of the universe?
... Because quasars are billions of years old, they provide important clues about the origins of the universe.
Question 10 of 20
How far away from Earth is the closest known quasar?
... The closest known quasar is around 600 million light-years away.
Question 11 of 20
How far away from Earth is the closest known pulsar?
... The closest pulsar, PSR J0437-4715, is about 500 light-years from earth.
Question 12 of 20
What does "pulsar" stand for?
... "Pulsar" is a shortened form of "pulsating star."
Question 13 of 20
What does "quasar" stand for?
... "Quasar" is short for "quasi stellar radio source."
Question 14 of 20
Which of the following rivals an atomic clock in the consistency of the radio waves it emits?
... The energy pulses released by pulsars rival an atomic clock in terms of consistency.
Question 15 of 20
Which of the following emit waves across the entire spectrum, including visible light?
... Pulsars emit a full spectrum of energy waves, while quasars are typically invisible to the naked eye.
Question 16 of 20
According to NASA, how many known quasars are there as of the early 21st century?
... Scientists currently are aware of about 1 million quasars.
Question 17 of 20
According to NASA, how many pulsars have been detected by scientists?
... Scientists have detected only around 1,800 pulsars as of the early 21st century.
Question 18 of 20
When were quasars first detected by scientists?
... Scientists first discovered quasars during the 1950s when they detected mysterious sources of radio waves.
Question 19 of 20
What nickname did scientists give to pulsars when they were first discovered in 1967?
... Scientists first nicknamed pulsars LGM, for "Little Green Men."
Question 20 of 20
Which of the following is more likely to have a unique or offbeat name?
... Pulsars all have names that start with PSR, followed by the pulsar's coordinates, while quasars can be named after their founders, appearances or other features.
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