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Digital Universe Guide - Hayden Planetarium

Digital Universe Guide - Hayden Planetarium

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4 CONTENTS<br />

4.2 Extragalactic Atlas Tutorial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152<br />

4.3 Extragalactic Data Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169<br />

4.4 Optimizing the Extragalactic Atlas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205<br />

A Light-Travel Time and Distance 207<br />

B Parallax and Distance 209<br />

C Redshift and Distance 212<br />

D Electromagnetic Spectrum 215<br />

E Constants and Units 217<br />

Index 220

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