Stars – National Radio Astronomy Observatory

Does Metallicity Affect the Evolution of a Star?

The metallicity of a star does not significantly affect its mass after formation but strongly influences how its mass…

A Tatooine-like planet, or a planet that orbits a binary star system, would very likely orbit at a relatively…

No. It is true that Sirius is above the horizon during a good part of the day during the…

The Sun’s absolute magnitude, which is its brightness if it were located at a distance of 10 parsecs (about…

A couple of things to note about radio signals that we measure from stars and other objects in the…

I believe that the most recent assessment of the age of this supernova remnant, based on an analysis of…

The National Radio Astronomy Observatory is a facility of the U.S. National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
	Founded in 1956, the NRAO provides state-of-the-art radio telescope facilities for use by the international scientific community. NRAO telescopes are open to all astronomers regardless of institutional or national affiliation. Observing time on NRAO telescopes is available on a competitive basis to qualified scientists after evaluation of research proposals on the basis of scientific merit, the capability of the instruments to do the work, and the availability of the telescope during the requested time. NRAO also provides both formal and informal programs in education and public outreach for teachers, students, the general public, and the media.
	The U.S. National Science Foundation (NSF) is an independent federal agency created by Congress in 1950 "to promote the progress of science; to advance the national health, prosperity, and welfare; to secure the national defense..."
	AUI collaborates with the scientific community and research sponsors to plan, build, and operate cutting-edge facilities. We cultivate excellence, deliver value, enhance education, and engage the public.