Science

Although not every galaxy has a supermassive black hole at its center, there is one in the center of the Milky Way.

Already in the 19th century, scientists speculated that graphite was composed of layers.

A memento of annihilation–the Chicxulub crater.

There are over 7.8 billion people in the world.

The Apollo program launched 11 crew missions between 1968 and 1972.

Silver is also used in the production of electrical and electronic equipment, high-voltage contacts, solder, high-capacity silver-zinc and silver-cadmium batteries, and photovoltaic cells.

The surface temperature of the moon is 75 K.

The density of the Moon is on average 3346,4 kg/m3.

In 2008, there was a violent snowstorm in Afghanistan.

Ganymede orbits Jupiter at a distance of 1.070.400 kilometers. The complete orbit takes 7 days and 3 hours.