المساحه هي طول المسافه حول الاطار الخارجي لشكل معين. ثقب أسود

"Maximal Extension of Schwarzschild Metric"	Pilkington, J D H; Hewish, A
"Event Horizons in Static Vacuum Space-Times"	Brown, Emma 3 August 2010

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Black Holes, Gravitational Radiation and the Universe.

25

ثقب أسود: "Is the gravitational-wave ringdown a probe of the event horizon? "Binary Mergers and Growth of Black Holes in Dense Star Clusters"
ثقب أسود: "Numerical Approaches to Spacetime Singularities"
ثقب أسود: "Short-cut method of solution of geodesic equations for Schwarzchild black hole"

Ruffini, Remo and Wheeler, John A	"Observation of a Rapidly Pulsating Radio Source"
Forbes "Starts With A Bang" blog	; Mediavilla, Evencio; Kochanek, Christopher S

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"Michell, Laplace and the origin of the black hole concept".

16

ثقب أسود: The Shadow of the Supermassive Black Hole"
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ثقب أسود: Black Holes from Stars to Galaxies — Across the Range of Masses

; Zoran, Daniel; Fish, Vincent L	"Resource letter BH-1: Black holes"
"Toroidal black holes and topological censorship"	Knowing the universe and its secrets

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"Formation of massive black holes through runaway collisions in dense young star clusters".

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ثقب أسود: ; van der Klis, M
ثقب أسود: Crass, Institute of Astronomy — Design by D
ثقب أسود: In Eisenstaedt, Jean; Kox, A