In 2004 Astronomers Made a Significant Discovery That Enabled Them

question 23

Multiple Choice

In 2004 astronomers made a significant discovery that enabled them to test some of the predictions of general relativity. What was this discovery?

• A) a neutron star with a mass more than 100 times the mass of the Sun
• B) two neutron stars collided with each other
• C) a pulsar that was not precessing and, in fact, that aimed its radiation beam directly at Earth
• D) two pulsars in orbit around each other

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