Planets – Page 4 – National Radio Astronomy Observatory

How to Determine if a Planet is Moving Retrograde

I believe that this question has been answered on the Physics StackExchange forum. Observationally, if you can measure the…

Since moons are visible by the light they reflect from the star that their parent planet orbits, the eclipse…

Perhaps what you are looking for is a way to visualize the positions of the planets on the sky…

Both planets have strong radio emission due to several different emission processes. Below a frequency of 40 MHz, cyclotron-maser…

If you assume that Pluto is still categorized as a planet, Pluto is normally the farthest planet from the…

As noted on NASA’s StarChild information system, Tycho made his observations using only a compass and a sextant.

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.