Life in the Cosmos

What is a small particle from a coment or asteroid that orbits the Sun?

Cells that lack a nucleus are called ...

Which geological features are believed to have been the main source of the Earth's oceans and atmosphere?

An organism that thrives in physically or geochemically extreme conditions is named an ...

Where does the water that formed many of the erosion features seen on Mars appear to have originated?

interstellar clouds that contain a very high concentration of dust are known as ...

What temperature is required for the proton-proton cycle to occur?

Which terrestrial planet(s) other than Earth have magnetic fields?

What is the most abundant element by mass in the human body?

The K-T boundary separates which two periods in Earth's history?

Beneath the surface or which moon of Jupiter is there the strongest evidence for the existence of a subsurface ocean of liquid water?

The residual polar caps on Mars are made of --- ice

What is the surface temperature of the Sun in K?

What is the name given to the model describing the formation of the Moon?

What is an object composed mainly of dust and ice that comes from the outer solar system towards the Sun?

Jovian moons are typically made of rock and ---

What is the name of the process in which a number of smaller nuclei combine to form a larger nucleus with the release of energy?

Unlike the Earth, Venus does not have a protective magnetic field because of its ...

For the transit of an extrasolar planet to be observed, the orbital plane of the planet has to be aligned along ...

The main chemical building blocks of life, C, H, O, and N were formed in ...