... time ago. It follows that such galaxies must be undergoing a passing burst of star formation. The term starburst usually also implies that the burst of star formation is occurring in the nuclear pointlike nuclei. The prototype starburst nucleus is NGC 7714. However, there exist related objects that meet the definition of short gas-exhaustion time scale but exhibit more widespread star formation. These include extragalactic ... as mnemonics, or memory aids. For example, if you spot three bright stars in a row in the winter evening, you might realize that that is part of the Orion Constel...

• Word Count: 5465
• Approx Pages: 22
• Has Bibliography
• Grade Level: High School