Welcome!

Introductions

The Multiwavelength Sky

• in Galactic coordinates
• optical
• 21 cm
• radio continuum
• microwave continuum
• CO molecules
• near IR
• mid-far IR
• soft X-ray continuum (source)
• 511 keV
• 1.8 MeV and its origin
• gamma rays > 100 MeV

Spectra

• the Sun: optical, UV, IR
• galaxy clusters: Virgo imaged in optical, X-ray spectrum
; Abell 2319 imaged in optical and microwave
• extragalactic HII region, namely I Zwicky 18
• mystery object (spoiler)
• another mystery object (spoiler)

Observables

The Electromagnetic Spectrum

Business: Course Syllabus