Crash Course Astronomy

Superclusters appear to fall along tremendously long, interconnected and intersecting ___

• threads

• filaments

• strands

• tendrils

In between the galactic filaments are vast regions relatively empty of galaxies called ___

• voids

• holes

• drains

• barrens

What image, taken in 1995, shows a small grain of the sky filled with thousands of galaxies?

• the James Webb Deep Field

• the Palomar Long Exposure

• the Spitzer Long Exposure

• the Hubble Deep Field

Tags

NGSS.HS-ESS1-2

In the 1960s, the peculiar object 3C273 was eventually determined to be ___

• an unassuming blue star

• a galaxy emitting radio waves

• a blue star emitting radio waves

• an unassuming galaxy

The most powerful energy source in the entire cosmos was dubbed, for short, a ___

• luminar

• pulsar

• quasar

• x-rayser

Galaxies that emit x-rays and gamma rays were given the generic name ___

• EM emitters

• active galaxies

• XG blasters

• emission galaxies

Tags

NGSS.HS-PS4-3

Which telescope was first used to search for evidence of black holes at the cores of galaxies?

• the Spitzer Space Telescope

• the Large Millimeter Telescope

• the Hubble Space Telescope

• the James Webb Space Telescope

If the poles of an active galaxy are aimed right at us, we see ___

• lots of infrared radiation

• lots of visible and ultraviolet light

• lots of radio waves

• lots of x-rays and gamma rays

Tags

NGSS.HS-PS4-3

A black hole, like the one in the Milky Way, that is not actively feeding is said to be ___

• impelling

• asleep

• quiescent

• progressive

One way to flip a quiescent black hole from a baby to a monster is through ___

• galactic collisions

• old age

• a dissipating accretion disk

• frictional forces