January 23, 2019

Why is sunlight bad for me?

A little bit of sun goes a long way. Sunlight contains invisible ultraviolet (UV) rays that can damage your skin, causing it to burn or wrinkle, […]
January 24, 2019

How do we know what the Milky Way looks like?

Actually, we don’t know for sure – no more than a bacteria deep inside your belly knows your hair color or shoe size. But unlike bacteria, […]
January 24, 2019

How old is the universe?

According to research, the universe is approximately 13.7 billion years old. Hubble has helped to measure the age of the universe using two different methods. The […]
January 24, 2019

How old is the Milky Way? (Our galaxy)

One of the basic ways to look at the age of the Milky Way is to look at globular clusters. These are dense clusters of stars […]