Maria Cunitz, the famous astronomer of the 17th century, has a geographical feature on planet Venus named Cunitz Crater in her honour .

Venus is part of the Solar System, which is a planetary system of the Milky Way galaxy. Do the following activities.

1- The speed of light is 300000 km per second. We can calculate that the light year -which is the distance light travels in one year- is, approximately, 9460000000000 km. Do the necessary calculations to obtain this data.

2- The diameter of the Milky Way is of 100000 light years approximately. Express this quantity in kilometres.