It was customary to represent black hole horizons via stationary solutions of field equations, i.e., solutions which admit a time-translational Killing vector field everywhere, not just in a small neighborhood of the black hole.
 While this simple idealization was natural as a starting point, it is overly restrictive.
 Physically, it should be sufficient to impose boundary conditions at the horizon which ensure only that the black hole itself is isolated.
 That is, it should suffice to demand only that the intrinsic geometry of the horizon be time independent, whereas the geometry outside may be dynamical and admit gravitational and other radiation.
A primordial black hole is a hypothetical type of black hole formed during the high-density, inhomogeneous phase of the Big Bang due to the gravitational collapse of important density fluctuations.
 The concept was first proposed in 1971 by Stephen Hawking, who introduced the idea that black holes may exist that are smaller than stellar mass, and are thus not formed by stellar gravitational collapse.
 Several mechanisms have been proposed to produce the inhomogeneities at the origin of primordial black hole formation—such as that of cosmic inflation, reheating, or phase transitions.
Giuliani Time is a 2005 documentary film by Kevin Keating about Rudy Giuliani, former Mayor of New York City.
Atomic Ed and the Black Hole is a documentary released in 2001 by filmmaker, Ellen Spiro.
 The documentary was made for HBO's Cinemax Reel Life Series.
 Sheila Nevins served as Executive Producer and Lisa Heller served as Supervising Producer.
 Karen Bernstein served as Producer.
 Laurie Anderson provided her song, Big Science, for the soundtrack.
In general relativity, a white hole is a hypothetical region of spacetime which cannot be entered from the outside, although matter and light can escape from it.
 In this sense, it is the reverse of a black hole, which can only be entered from the outside and from which matter and light cannot escape.
 White holes appear in the theory of eternal black holes.
 In addition to a black hole region in the future, such a solution of the Einstein field equations has a white hole region in its past.
 However, this region does not exist for black holes that have formed through gravitational collapse, nor are there any known physical processes through which a white hole could be formed.
 Although information and evidence regarding white holes remains inconclusive, the 2006 GRB 060614 has been proposed as the first documented occurrence of a white hole.
A black hole starship is a theoretical idea for enabling interstellar travel by propelling a starship by using a black hole as the energy source.
 The concept was first discussed in science fiction, notably in the book "Imperial Earth" by Arthur C. Clarke, and in the work of Charles Sheffield, in which energy extracted from a Kerr-Newman black hole is described as powering the rocket engines in the story "Killing Vector" (1978).
An active galactic nucleus (AGN) is a compact region at the center of a galaxy that has a much higher than normal luminosity over at least some portion—and possibly all—of the electromagnetic spectrum, with characteristics indicating that the excess luminosity is not produced by stars.
 Such excess non-stellar emission has been observed in the radio, microwave, infrared, optical, ultra-violet, X-ray and gamma ray wavebands.
 A galaxy hosting an AGN is called an active galaxy.
 The radiation from an AGN is believed to be a result of accretion of matter by a supermassive black hole at the center of its host galaxy.
 AGN are the most luminous persistent sources of electromagnetic radiation in the universe, and as such can be used as a means of discovering distant objects; their evolution as a function of cosmic time also puts constraints on models of the cosmos.
 The observed characteristics of an AGN depend on several properties such as the mass of the central black hole, the rate of gas accretion onto the black hole, the orientation of the accretion disk, the degree of obscuration of the nucleus by dust, and presence or absence of jets.
 Numerous subclasses of AGN have been defined based on their observed characteristics; the most powerful AGN are classified as quasars.
In quantum gravity, a virtual black hole is a black hole that exists temporarily as a result of a quantum fluctuation of spacetime.
 It is an example of quantum foam and is the gravitational analog of the virtual electron–positron pairs found in quantum electrodynamics.
 Theoretical arguments suggest that virtual black holes should have mass on the order of the Planck mass, lifetime around the Planck time, and occur with a number density of approximately one per Planck volume.
A hypercompact stellar system (HCSS) is a dense cluster of stars around a supermassive black hole that has been ejected from the center of its host galaxy.
 Stars that are close to the black hole at the time of the ejection will remain bound to the black hole after it leaves the galaxy, forming the HCSS.
The discography of Weezer, an American rock band, consists of 10 studio albums, two compilation albums, one video album, six extended plays, twenty-eight singles and twenty-four music videos. Weezer's self-titled debut studio album, often referred to as "The Blue Album", was released in May 1994 through DGC Records.
 The album was a huge commercial success, peaking at number 16 on the US "Billboard" 200 and spawning the singles "Undone – The Sweater Song" and "Buddy Holly", both of which were responsible for launching Weezer into mainstream success with the aid of music videos directed by Spike Jonze.
 It has sold 3.3 million copies in the United States and has been certified triple platinum by the Recording Industry Association of America (RIAA), becoming the band's best selling album to date.
 Following the success of their debut album, Weezer took a break from touring for the Christmas holidays.
 Lead singer Rivers Cuomo began piecing together demo material for Weezer's second studio album.
 Cuomo's original concept for the album was a space-themed rock opera, "Songs from the Black Hole".
 Ultimately, the "Songs from the Black Hole" album concept was dropped; the band, however, continued to utilize songs from these sessions into work for their second studio album. "
Pinkerton" was released as the band's second studio album in September 1996.
 Peaking at number 19 on the "Billboard" 200, it was considered a critical and commercial failure at the time of its release, selling far less than its triple platinum predecessor.
 However, in the years following its release, it has seen much critical and commercial championing.

Question: Was Atomic Ed and the Black Hole or Giuliani Time released first?
Answer: Atomic Ed and the Black Hole