square degree


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square degree

[′skwer di′grē]
(mathematics)
A unit of a solid angle equal to (π/180)2 steradian, or approximately 3.04617 × 10-4 steradian.
References in periodicals archive ?
In Section 4, we present the least square degree reduction of [lambda]-Bezier curve.
In this talk, I will discuss the status and latest results of a recently completed 1000 square degree imaging survey, the second Red-sequence Cluster Survey (RCS-2), primarily aimed at discovering clusters of galaxies out to z~1.
Pegasus is home to numerous galaxies, including the Pegasus 1 galaxy cluster occupying a square degree of sky on the Pegasus-Pisces border, but with the exception of spiral galaxy NGC 7331 (see Observers' Forum in 2005 December), the majority of these are faint and need large apertures to view them.
Current gamma-ray telescopes can't pinpoint the location of sources to better than 1 square degree, twice the size of the sun as it appears on the sky, Grenier says.
95 metre aperture wide-field Schmidt camera was launched on a Delta II rocket into an Earth-trailing solar orbit 1,530km behind the Earth, where it will have an uninterrupted view of a 105 square degree section of sky in Cygnus and Lyra (see front cover image).
A space-based telescope with a huge field of view--one square degree, or twice the apparent size of the full moon--could within a year hunt down and extensively study 2,000 type la supernovas, Perlmutter said at the Schramm memorial meeting, held in late May at the Fermi National Accelerator Laboratory in Batavia, Ill.
Metcalfe adds that the total number of galaxies detected in his team's survey -- about 1 million galaxies per square degree -- seems too big for the volume of space available in a model of the universe favored by many cosmologists.
From the number they saw in their sample areas, the astronomers estimate that there are about 1,000 such objects per square degree of sky.
The stars are most densely crowded along the plane of our galaxy, where there are as many as 150,000 stars in one square degree of sky.
Naval Observatory's UCAC3 astrometric catalog was made with an imaging system that covered a square degree in a single exposure.
ZTF scans the sky 12 times faster than PTF, recording 3,750 square degrees per hour at its full speed.