GK
THE UNIVERSE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
has an age between the youngest and oldest stars.
|
|
|
is exactly the same age as the average star.
|
|
|
must be older than the oldest stars.
|
|
|
could be younger than the youngest stars.
|
Detailed explanation-1: -When trying to determine the approximate age of the universe, scientists have used data on the ages of stars. What conclusion can they logically draw from this data? They can conclude that the universe-has an age between the youngest and oldest stars.
Detailed explanation-2: -WMAP. NASA’s Wilkinson Microwave Anisotropy Probe (WMAP) project’s nine-year data release in 2012 estimated the age of the universe to be (13.772±0.059)×109 years (13.772 billion years, with an uncertainty of plus or minus 59 million years).
Detailed explanation-3: -Astronomers estimate that the Big Bang occurred between 10 and 20 billion years ago. They estimate the age of the Universe in two ways: (a) by looking for the oldest stars; and (b) by measuring the rate of expansion of the Universe and extrapolating back to the Big Bang.