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[1] [2] [3] In the unlikely event that dark stars have endured to the modern era, they could be detectable by their emissions of gamma rays , neutrinos , and antimatter and would be associated with clouds of cold molecular hydrogen gas that normally would not harbor such energetic, extreme, and rare particles.
Dark star (Newtonian mechanics), a star that has a gravitational pull strong enough to trap light under Newtonian gravity Dark star (dark matter), a star heated by annihilation of dark matter particles within it
A dark star, therefore, has a rarefied atmosphere of "visiting particles", and this ghostly halo of matter and light can radiate, albeit weakly. Also as faster-than-light speeds are possible in Newtonian mechanics, it is possible for particles to escape. Radiation effects A dark star may emit indirect radiation as described above.
Ptolemy's theorem states that the sum of the products of the lengths of opposite sides is equal to the product of the lengths of the diagonals. When those side-lengths are expressed in terms of the sin and cos values shown in the figure above, this yields the angle sum trigonometric identity for sine: sin(α + β) = sin α cos β + cos α sin β.
The RQ-3 DarkStar (known as Tier III-or "Tier three minus" during development) is an unmanned aerial vehicle (UAV). Its first flight was on March 29, 1996. The Department of Defense terminated DarkStar in January 1999, after determining the UAV was not aerodynamically stable and was not meeting cost and performance objectives. [1]
A black star does not require an event horizon, and may or may not be a transitional phase between a collapsing star and a singularity. A black star is created when matter compresses at a rate significantly less than the free fall velocity of a hypothetical particle falling to the center of its star.
The DarkStar One is an advanced, partly organic starship that was built by the protagonist's late father, Simon Jarvis, using technologies from an ancient race. Jarvis was the co-founder and co-owner of a security firm, SimRob Industries, and his business partner and friend, Robert Altair, gives Jarvis's son Kayron, the protagonist, the starship after his father's death.
In a gravastar, the event horizon is not present. The layer of positive-pressure fluid would lie just outside the "event horizon", being prevented from complete collapse by the inner false vacuum. [1] Due to the absence of an event horizon, the time coordinate of the exterior vacuum geometry is everywhere valid.