EVERYDAY SCIENCE

Detailed explanation-1: -Our Milky Way galaxy is a big place. Even at this blazing speed, it takes the sun approximately 225-250 million years to complete one journey around the galaxy’s center. This amount of time – the time it takes us to orbit the center of the galaxy – is sometimes called a cosmic year.

Detailed explanation-2: -A cosmic year is the time (about 225 million years) needed for the solar system to revolve once around the centre of the Milky Way Galaxy.

Detailed explanation-3: -The age of the Sun, according to the Stanford Solar Centre’s page How old is the Sun? is approximately 4.57 billion years. This would put the sun at approximately 20.5 galactic years old.

Detailed explanation-4: -The solar system sits some 26, 500 light years from the galactic centre, about halfway along a spiral arm. We orbit the centre of the Milky Way about once every 240 million years.

Detailed explanation-5: -The galactic year, also known as a cosmic year, is the duration of time required for the Sun to orbit once around the center of the Milky Way Galaxy. One galactic year is 230 million Earth years.