Meet NGC 3324 and IC2599 The Gabriela Mistral Nebula - VisibleDark

Section of Carina Nebula with Gigantic Sparkling Stars Gets Imaged by Hubble Space Telescope

Use the result of Problem 6.3 for NGC 1399's central surface brightness, and assume that all this light comes from the core of radius rc=2^'' or 650 pc, to find the core luminosity density. Show that the luminosity density at the center of the Virgo cluster is 2500 times greater than average for the Universe as a whole (see Equation 1.25), but the core of NGC 1399 is 10^7 times denser yet. Stars are packed far more tightly into galaxies than galaxies are packed into clusters. | Numerade

The core radius rc of NGC 1399 is ∼5^'' or 400 pc. Use Equation 3.46 to combine the measured dispersion σr from Figure 6.12 with the result of Problem 6.3, to show that the mass-to-light ratio in the central parts is ℳ / LV ∼7. This is only slightly larger than that in the Milky Way's globular clusters (Section 3.1), suggesting that the core of this galaxy contains little dark matter. | Numerade

Hubble Telescope spots a stunning spiral galaxy shining in the 'Little Lion' (image)

NGC 3314