The Hubble constant is about 70 km/s/Mpc70 km/s/Mpc, which means that a galaxy traveling at 2800 km/s away from the Milky Way is about 40 Mpc away.  What would the velocity of the Milky Way be as seen from such a galaxy?

Match the components of the Milky Way Galaxy to their definitions.

The globular clusters in our galaxy form a ‘swarm’ that is centered on

Which type of galaxy always has an active nucleus?

How do astronomers explain the fact that all galaxies outside our Local Group show a redshift?  The universe is

According to astronomical measurements, the age of the Universe is closest to

The accelerating expansion of the universe is thought to be driven by

Match the following objects to their descriptions.

Match the types of galaxies to the pictures. [Image 1] [Image 2] [Image 3]

The idea that physical laws must be the way they are because otherwise we could not be here to measure them is