New Limits to the Diameters of Some Radio Sources


THE investigations at Jodrell Bank of the angular diameters of extra-terrestrial radio sources have now reached the stage where interferometric observations are being made with a base-line of 32,000 wavelengths. The interferometer operates at a wavelength of 1.89 m., and uses the 250-ft. steerable paraboloid in conjunction with auxiliary aerials which are now placed about 40 miles to the west of Jodrell Bank near the Welsh coast. This is the longest baseline to be used so far for the observation of radio sources, and it is possible with this instrument to set new limits to the diameter of some radio sources which are significantly smaller than those previously reported1.

Access options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.


  1. 1

    Morris, D., Palmer, H. P., and Thompson, A. R., The Observatory, 77, 103 (1957).

  2. 2

    Edge, D. O., Shakeshaft, J. R., McAdam, W. B., Baldwin, J. E., and Archer, S., Mem. Roy. Astro. Soc., 68, 37 (1960).

  3. 3

    Bolton, J. G., U.R.S.I. Thirteenth General Assembly, London (1960).

  4. 4

    Hoyle, F., Paris Symposium on Radio Astronomy, edit. by Bracewell, R. N., 529 (Stanford Univ. Press, 1959).

  5. 5

    Davidson, W., Mon. Not. Roy. Astro. Soc., 120, 271 (1960).

  6. 6

    Rowson, B., Mon. Not. Roy. Astro. Soc., 119, 25 (1959).

  7. 7

    Jennison, R. C., and Latham, V., Mon. Not. Roy. Astro. Soc., 119, 174 (1959).

Download references

Author information



Rights and permissions

Reprints and Permissions

About this article

Cite this article

ALLEN, L., PALMER, H. & ROWSON, B. New Limits to the Diameters of Some Radio Sources. Nature 188, 731–732 (1960).

Download citation

Further reading


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.