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Explorations an Introduction to Astronomy Thomas T. Arny | ||||||||
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Chapter
Images
Chapter 16, Figure 23
Figure
16.23
Two quasars,
as viewed from space by the Hubble Space Telescope (top) and from the ground
(bottom). The top image is of PG 0052+251 (John Bahcall (Institute for Advanced
Study), M. Disney (University of Wales) and NASA). The bottom photo is of
3C273 (Courtesy NOAO). In the groundbased photo you can see only a smear of
light. The clearer view with the HST shows the galaxy surrounding the active
core. ('PG' stands for Palomar Green survey and '3C' stands for Third Cambridge
Catalog of Radio Sources.)
