Topic 15 – Our place in the Galaxy 15.1 - Understand the appearance of the Milky Way from Earth as seen with binoculars or a small telescope

15.2 - Know the size and shape of our Galaxy and the location of the Sun, dust, sites of star formation and globular clusters

15.3 - Understand how 21 cm radio waves, rather than visible light, are used to determine the structure and rotation of our Galaxy

15.4 - Know that the group of galaxies gravitationally linked to the Milky Way is called the Local Group

15.5 - Know the composition and scale of the Local Group, including its principal components:
a) Andromeda Galaxy (M31)
b) Large and Small Magellanic Clouds (LMC and SMC)
c) Triangulum Galaxy (M33)

15.6 - Be able to classify galaxies using the Hubble classification system, including:
a) spiral
b) barred spiral
c) elliptical
d) irregular

15.7 - Know how the different types of galaxies were placed by Hubble on his ‘Tuning Fork’ diagram

15.8 - Know that the Milky Way is a barred spiral (SBb) type galaxy

15.9 - Know that some galaxies emit large quantities of radiation in addition to visible light

15.10 - Know that an Active Galactic Nucleus (AGN) is powered by matter falling onto a super-massive black hole

15.11 - Know types of active galaxies, including:
a) Seyfert galaxies
b) quasars
c) blazars

15.12 - Know that information about AGNs can be obtained from many regions of the electromagnetic spectrum

15.13 - Understand why galaxies are grouped in larger clusters and superclusters

15.14 - Understand the main theories for the formation and evolution of galaxies
Topic 6 – Celestial observation 6.21 - Understand the appearance of the Milky Way from Earth as seen with the naked eye


In this section you will learn about different types of galaxies.