Title: The cosmic triangle
Authors: Bahcall, Neta.; Harvard-Smithsonian Center for Astrophysics.
Year: 1999
Subjects: Cosmology.; Expanding universe.
Abstract: The Cosmic Triangle is introduced as a way of representing the past, present, and future of the universe. Our location in the cosmic triangle is determined by the answers to three questions: How much matter is in the universe? Is the expansion rate slowing down or speeding up? and, Is the universe flat? Recent observations show a universe that is lightweight, accelerating, and flat.