The Milky Way is the galaxy where we live. Its diameter is somewhere between 100,000 light-years and 180,000 light-years.

There are probably at least 100 billion planets in the Milky Way. One of them is our Earth.

The Milky Way is estimated to be 13.4 billion years old. Pretty close to the age of the universe, which is 13.7 billion years.

Although the Milky Way seems big, it is actually only one of the 100 billion galaxies in the whole universe.

The nearest galaxy is the Canis Major dwarf galaxy, which is about 25,000 light-years away. With current technology, it would take about 500 million years to get there...