When We Determine the Age of the Universe Using the Hubble

question 25

Multiple Choice

When we determine the age of the universe using the Hubble Time, what important simplifying assumption goes into our calculations?

• A) that the expansion of the universe has been happening at the same rate - neither speeding up or slowing down
• B) that all the galaxies are moving away from us at exactly the same speed, no matter how far away they are
• C) that the cosmological principle doesn't hold: the universe is not isotropic and homogeneous
• D) that we have accounted correctly for the effects of dark energy
• E) that the universe is actually contracting instead of expanding

---

Definitions:

Barbizon Painters

A group of 19th-century French artists who worked in the village of Barbizon, known for their realistic landscapes that emphasized tonal qualities and the dramatic use of light.

Village Life

Village life describes the lifestyle, traditions, and social structures found in rural villages, characterized by smaller, closely-knit communities often engaged in local agriculture or craftsmanship.

Socialist Party

A political organization advocating for a system where the means of production, distribution, and exchange are owned or regulated by the community as a whole.

First World War

A global conflict from 1914 to 1918, involving many of the world's nations in battles across Europe and abroad, also known as World War I.