Which occurrence would contradict the big bang theory? Over time, distant galaxies move progressively closer to Earth. A scientist discovers a black hole outside the Milky Way galaxy. The average temperature of the universe decreases. A scientist discovers a planet that is about 10 million years old.
The Correct Answer and Explanation is:
The occurrence that would contradict the Big Bang theory is:
Over time, distant galaxies move progressively closer to Earth.
Explanation:
The Big Bang theory posits that the universe began as a singularity about 13.8 billion years ago and has been expanding ever since. This expansion is observable through the redshift of light from distant galaxies, which shows that galaxies are moving away from us. The farther a galaxy is, the faster it seems to be receding from us. This phenomenon is evidence of the ongoing expansion of the universe.
If distant galaxies were observed to be moving progressively closer to Earth, it would directly contradict this fundamental concept of cosmic expansion. Such a discovery would challenge our understanding of the universe’s origins and expansion and imply that either the Big Bang theory is incorrect or that there are forces in the universe we don’t yet understand, causing galaxies to move toward each other rather than away.
In contrast:
- A scientist discovering a black hole outside the Milky Way is consistent with the Big Bang theory, as black holes are a natural result of stellar evolution and the formation of galaxies in an expanding universe.
- The average temperature of the universe decreasing is actually consistent with the Big Bang theory. As the universe expands, it cools down, and this is in line with the observations we make, such as the cosmic microwave background radiation.
- A scientist discovering a planet that is about 10 million years old would not contradict the Big Bang theory either. Planets form within galaxies, and the formation of planets is a process that occurs long after the Big Bang, within the context of a universe that has been expanding for billions of years.
