Sentences with phrase «angular diameter of»

This planetary nebula is certainly the most impressive object of its kind in the sky, as the angular diameter of the luminous body is nearly 6 arc minutes, with a faint halo extensing out to over 15», half the apparent diameter of the Moon (Millikan 1974).

[42] This is about four times the angular diameter of the Full Moon, and almost exactly half the distance between Alpha Centauri AB and Beta Centauri.

It shows an area of sky large 13,9 ° x 13,9 ° (for comparison, the full - Moon has an angular diameter of about 0,5 °).

For comparison, Earth's Moon has an angular diameter of about two billion microarcseconds, and the required resolution is that required to resolve objects separated by two inches on the Moon's surface.

It appears quite small without a telescope because only the central part is bright enough to be visible, but the full angular diameter of the galaxy is seven times that of the full moon.

Not exact matches

For in practice I can only assure myself that two angular measurements are equal by reference to the circle, the one plane curve of constant curvature, and I satisfy myself that my curve of reference is a circle by» ascertaining the equality of length of its diameters, and this is done by the rotation of the measuring - rod.

He set up his experiment to measure spin angular momentum of photons in high vacuum, with measurements based on the rotation of a two - inch diameter wave plate — a device that can alter the polarization state of light passing through it.

This list is every galaxy with an angular size greater than 1.8 arcminutes within 7.5 degrees of the centre of the cluster which at a distance of 52 million light years corresponds to every galaxy with a diameter greater than 30 thousand light years within 7 million light years from the centre.

All of these groups are ones containing at least 3 galaxies with an angular diameter larger than 100 arcseconds - a measure which is obviously biased towards closer groups.

The relationship between the angular size of the smallest details that can be distinguished (θ), the wavelength (λ) and the diameter (D) is given by: θ ≈ λ / D.

When the signals of individual telescopes are combined using the interference of radio waves, this array of telescopes has the angular resolution equivalent to a radio telescope of 350 000 km in diameter — almost the distance between the Earth and Moon.

Note that this effect of size on the perceived contrast can not be explained by the finite resolution of the visual system, because we used disks with angular diameter much larger than that of the Airy disk, and the effect was exactly the same for disks of the two different diameters we used.

Thorough analysis of interferometric data was performed to measure the stellar angular diameter and to search for circumstellar material.

Basic physics tells us that as the diameter increases, the rate of rotation will slow in order to conserve angular momentum.