Kathryn Janeway is a fictional character in the Star Trek franchise. She was the Captain of the Starfleet starship USS Voyager while it was lost in the Delta Quadrant on the other side of the galaxy. After returning home to the Alpha Quadrant, she is promoted to Vice-Admiral and briefly appears in the 2002 film Star Trek: Nemesis. She is seen again commanding the USS Dauntless in Star Trek: Prodigy, searching for the missing USS Protostar which was being commanded by Captain Chakotay, her former first officer on Voyager, at the time of its disappearance.
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as "stellar nurseries" or "star-forming regions", collapse and form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function. Most stars do not form in isolation but as part of a group of stars referred as star clusters or stellar associations.
The nebular hypothesis is the most widely accepted model in the field of cosmogony to explain the formation and evolution of the Solar System. It suggests the Solar System is formed from gas and dust orbiting the Sun. The theory was developed by Immanuel Kant and published in his Universal Natural History and Theory of the Heavens (1755) and then modified in 1796 by Pierre Laplace. Originally applied to the Solar System, the process of planetary system formation is now thought to be at work throughout the universe. The widely accepted modern variant of the nebular theory is the solar nebular disk model (SNDM) or solar nebular model. It offered explanations for a variety of properties of the Solar System, including the nearly circular and coplanar orbits of the planets, and their motion in the same direction as the Sun's rotation. Some elements of the original nebular theory are echoed in modern theories of planetary formation, but most elements have been superseded.
A protostar is a very young star that is still gathering mass from its parent molecular cloud. The protostellar phase is the earliest one in the process of stellar evolution. For a low-mass star, it lasts about 500,000 years. The phase begins when a molecular cloud fragment first collapses under the force of self-gravity and an opaque, pressure supported core forms inside the collapsing fragment. It ends when the infalling gas is depleted, leaving a pre-main-sequence star, which contracts to later become a main-sequence star at the onset of hydrogen fusion producing helium.
Yesterday or yesterdays may refer to:
All Our Yesterdays may refer to:
Ex Machina is a portion of the phrase deus ex machina, meaning "god from the machine". It may refer to:
A chrysalis is the pupa stage of a butterfly.
Byte Beautiful: Eight Science Fiction Stories is a 1985 short story collection by James Tiptree, Jr. All but one of the stories, "Excursion Fare", had previously also appeared in earlier short story collections by James Tiptree, Jr.
A starship is a theoretical vehicle for interstellar travel.
Protostar: War on the Frontier is a 1993 science fiction video game produced by Tsunami Media that blends elements of role-playing, space exploration, space combat, and strategy. The player commands a spaceship from a first-person perspective in real-time capable of traveling to the various planets in the game world and launching an explorer vessel to traverse their surfaces. Several sentient alien races inhabit the region with whom the player interacts through friendly conversation, intense spaceship combat, or barter at their planetary trading posts. One of these races, the Skeetch, is aggressively threatening to conquer the Earth; the player has been recruited to convince the other sentient races in the region to join humanity in an alliance against the Skeetch. A secondary goal of the game is to earn money by performing actions such as selling alien lifeforms and minerals collected on planetary surfaces to obtain the funds needed to upgrade the player's spaceship and improve the odds of survival in confrontations with the Skeetch and other hostile entities. Computer Gaming World criticized the game for failing to break new ground and for its "muddled" blend of science fiction themes, but did recommend it to players new to this genre.
A quasi-star is a hypothetical type of extremely massive and luminous star that may have existed early in the history of the Universe. Unlike modern stars, which are powered by nuclear fusion in their cores, a quasi-star's energy would come from material falling into a black hole at its core.
W33A is a protostar located approximately 12,000 light-years away from Earth, in the constellation Sagittarius. As a star in the early stages of formation, it has attracted the interest of astronomers, who observed that while the protostar is accumulating material from surrounding clouds of gas and dust, it is simultaneously ejecting fast moving jets of particles from its north and south poles.
LRLL 54361 also known as L54361 is thought to be a binary protostar producing strobe-like flashes, located in the constellation Perseus in the star-forming region IC 348 and 950 light-years away.
HH 24-26 is a molecular cloud and star-forming region containing the Herbig-Haro objects HH 24, HH 25 and HH 26. This region contains the highest concentration of astrophysical jets known anywhere in the sky. The molecular cloud is located about 1400 light-years away in the L1630 dark cloud, which is part of the Orion B molecular cloud in the constellation of Orion.
Protostar is an extended play (EP) marketed as the debut single of Japanese boy group JO1, formed through the reality competition show Produce 101 Japan. It also served as the lead single for their first studio album The Star (2020). Consisting of songs previously performed on the last episode of the show and three new songs, the EP single was released by Lapone Entertainment into three different editions on March 4, 2020. It features the participation of various South Korean songwriters and production teams such as KZ, Kim Seung-soo, Nthonious, KCKT, Ryan S. Jhun, Andrew Choi, and others.
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