Not that

Huge gravitationally bound collections of stars with very little else between them.

Andromeda Galaxy M31

Triangulum Galaxy M33

The small and large magellanic clouds (the SMC and the LMC)

Large Milky band stretching across the sky

We are looking into the plain of our galaxy from one of its spiral arms

Not that

Not that

A giant disk shaped Catherine Wheel rotating around a central bulge

In the Summer Triangle

In a line from Cassiopeia to Cygnus

In the Winter Triangle

The galactic centre lies in Sagittarius

The disk - Young stars, gas and dust - Four major spiral arms - Is 1-2kpc thick - 30kpc in diameter

The disk - Globular clusters (dense groups of relatively old stars) Spherically distributed along the galactic centre

A bulge surrounding the nucleus (black hole)

The Halo - Globular clusters (dense groups of relatively old stars) Spherically distributed along the galactic centre

The halo - Young stars, gas and dust - Four major spiral arms - Is 1-2kpc thick - 30kpc in diameter

In One of the spiral arms

10kpc from nucleus in a spiral arm

Floating with the Globular Clusters

In the Bulge

5kpc from nucleus in a spiral arm

Not that!

Huge clouds of gas and dust that can block light

Microwave EMR (wavelength =21cm, frequency = 1420mHz) can be seen by radio telescopes on Earth. This wavelength is given off by hydrogen.

None of the above

Psychic Seeing

Doppler shifts in the wavelengths - We can work out how the galaxy is rotating