physics – Page 3 – National Radio Astronomy Observatory

Could there be an Earth Twin on the Other Side of the Solar System Sharing Earth’s Orbit?

In fact, no. At least if we are talking about another planet, call it an “invisible twin”, on the…

Yes, though the formation process for such a system is rather difficult to construct, making such binary planet systems…

There is a very nice description of the comparison of the Sun’s and Moon’s paths through the sky from…

What you observed was probably the natural position of the Moon at this point in its regular path through…

Regarding your first question, if space curvature is not due to the gravitational force of an object, then you…

There is in fact a really thorough answer to this question posted to the astronomy stack exchange. Although the…

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.