More cards in this set

What makes up the Universe?

Put in order of size what makes up the Universe from smallest to largest?

Where does all the evidence we have about distant stars and galaxies come from?

What speed does light travel through space (a vacuum)?

What is a light-year?

What does the finite speed of light tell us about very distant objects?

What is parallax?

How can the distance to a star be estimated?

What can interfere with observations of the night sky?

Why are there uncertainties about the distances of stars and galaxies?