We are now 10 light years away from the earth and we pass the next fixed stars in the sky, the "nearby" star environment.
100 trillion francs. For as much coal to buy the entire surface including the oceans.
100 PBq or 1E +17 Bq equal to the radioactivity in a reference to spent fuel or vitrified high level waste filled transport and storage containers.
About 100 Brd seconds or more than 3 billion years ago the earth is about 4.5 billion years old what means it is very young. Volcanoes and an inhospitable atmosphere dominated the terrestrial surface. The first microorganism began to grow in the oceans.