GRE Question of the Day (January 3)
A supernova is a brief stellar explosion so luminous that it can briefly outshine an entire galaxy. While the explosion itself takes less than fifteen seconds, supernovae take weeks or months to fade from view; during that time, a supernova can emit an amount of energy equivalent to the amount of energy the sun is expected to radiate over its entire lifespan. Supernovae generate enough heat to create heavy elements, such as mercury, gold, and silver. Although supernovae explode frequently, few of them are visible (from Earth) to the naked eye. In 1604 in Padua, Italy, a supernova became visible, appearing as a star so bright that it was visible in daylight for more than a year. Galileo, who lectured at the university, gave several lectures widely attended by the public. The lectures not only sought to explain the origin of the “star” (some posited that perhaps it was merely “vapour near the earth”), but seriously undermined the views of many philosophers that the heavens were unchangeable. This idea was foundational to a worldview underpinned by a central and all-important Earth, with celestial bodies merely rotating around it.
The primary purpose of the passage is to
Correct Answer – B – (click and drag your mouse to see the answer)
Consider each of the answer choices separately and indicate all that apply.
Which of the following can be inferred by the passage?
Correct Answer – 1 – (click and drag your mouse to see the answer)
The author mentions which of the following as a result of the supernova of 1604?
(A) The supernova created and dispersed the heavy elements out of which the Earth and everything on it is made.
Correct Answer – C – (click and drag your mouse to see the answer)