physics – Page 5 – National Radio Astronomy Observatory

Proton-Proton Cycle Question: Why is the Mass of a Helium Nucleus Less Than the Sum of Four Hydrogen Nuclei?

Let’s do the calculation using atomic mass units (u) for the Hydrogen and Helium atoms involved. H = 1.00784…

Yes. Planets that orbit a single star in a binary star system are called “non-circumbinary planets”. In general, a…

The precession of the Earth’s orbital axis, with a period of about 26000 years, slowly changes the position of…

I think that you can derive the information you are looking for by noting that: (1) Since the moons…

I believe that this question has been addressed in a previous answer to a question about the Orbital Period…

This question has been answered very thoroughly on Astronomy.com. As the Moon stabilizes the Earth’s axial tilt and drives…

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.