Life in the Cosmos

To the nearest billion years, how old is the Sun?

What characteristic allows TItan to have an atmosphere whereas the similarly sized Mercury does not?

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

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

Jovian moons are typically made of rock and ---

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

Where is the Sun within the Milky Way Galaxy?

What is the approximate lifetime of the Sun (in billions of years)?

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

The total mass of all existing asteroids is 1/--- of that of the Earth

Less massive stars have longer/shorter/similar lifetimes to more massive stars?

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

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

Life probably did not originate on the land surface because of the lack of the --- Layer

What must be reduced in the disk around the forming Sun for planets to form?

An Object with insufficient mass to sustain nuclear fusion in their cores is a ...

What is the most abundant gas in the atmosphere of Titan?

Layers of sediment that once contained colonies of ancient microbes are called

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

The point in a solar system beyond which that hydrogen compounds condense into solid ice grains is known as ...