Astrogeology is the study of the physical properties of celestial bodies, including their composition, structure, and surface features.

Meteorites are classified into three main types: stony, iron, and stony-iron. Glassy meteorites are not a recognized type.

The Vredefort crater in South Africa is the largest impact crater in the solar system, with a diameter of approximately 300 kilometers.

Ganymede is the largest moon in the solar system, and is larger than the planet Mercury.

Pluto was considered the tenth planet from 1930 until 2006, when it was reclassified as a dwarf planet.

Our solar system is located in the Milky Way galaxy, which is a barred spiral galaxy.

The Big Bang theory is the prevailing cosmological model for the universe from the earliest known periods through its present expansion and cooling.

The cosmic microwave background is a remnant of the Big Bang and is the oldest light in the universe.

Dark energy is a hypothetical form of energy that is thought to be responsible for the accelerated expansion of the universe.

The steady state theory suggests that the universe is infinite and has no beginning or end, and that new matter is constantly being created to replace the matter that is lost.

The oscillating universe theory suggests that the universe is oscillating between periods of expansion and contraction, with each cycle beginning with a Big Bang and ending with a Big Crunch.

The cyclic cosmology theory suggests that the universe is cyclic, with each cycle beginning with a Big Bang and ending with a Big Crunch, followed by another Big Bang.

The Big Bounce theory suggests that the universe began with a Big Bounce, rather than a Big Bang, and that the universe is oscillating between periods of expansion and contraction.

WIMP (Weakly Interacting Massive Particle) is a hypothetical particle that is thought to be responsible for the dark matter in the universe.