1. Place the following images in a sequence to represent the life cycle of a mid-sized star: 5, 7, 10, 11, 13, 20, 23 510723111320 5 – CFHT Optical Image of M47 – The Orion Nebula 10 – William Hartmann Illustration of Proto-Planetary System 7 – SOHO (Extreme UV) Image of the Sun 23 – Jeff Bryant Artist Illustration of a Red Giant 11 – Hubble Image of NGC 2440 13 – Hubble Image of NGC 3132 - the Eight Burst Nebula 20 – U Leicester UK Artist Illustration of a White Dwarf

2. Place the following images in a sequence to represent the life cycle of a massive star: 4, 5, 9, 10, 12, 15, 16, 24 510154912 16 5 – CFHT Optical Image of M42 – The Orion Nebula 10 – Wm Hartmann Illustration of Proto-Planetary System 15 – David Malin (AAO) Image of Pleiades Open Cluster 4 – Hubble Image of Red Supergiant Betelgeuse 9 – Hubble Optical Image of Eta Carina 12 – Chandra X-ray Image of Cas A Supernova Remnant 16 – CXC Artist M. Weiss Illustration of a Black Hole 24 – Chandra X-Ray Image of the Crab Pulsar 24 or

3. Place the following images in a sequence that results in a Type Ia supernova object: 3, 5, 7, 10, 11, 13, 18, 20, 22, 23 510723111320 18223