All articles starting with S
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Stellar Blade: Blood Rain
Stellar Blade: Blood Rain is Shift Up's upcoming sequel to Stellar Blade, announced at Summer Game Fest June 5, 2026. New heroine Evie fights with transforming gauntlets; parry-dodge combat returns; self-published, multiplatform, release expected 2027.
Stellar classification
Stellar classification, or spectral classification, sorts stars into groups by their spectra, chiefly the temperature sequence O B A F G K M, ordered from hottest to coolest.
Stellar collision
A stellar collision, also called a stellar merger, is when two stars or a star and a compact remnant strike each other and may merge, forming blue stragglers.
Stellar designations and names
Stellar designations and names, or stellar nomenclature, are the identifiers for individual stars: proper names like Sirius and systematic designations like Alpha Centauri or HD 209458.
Stellar dynamics
Stellar dynamics is the branch of astrophysics that studies the motions of stars and other gravitating bodies in clusters, galaxies, and galactic nuclei under mutual gravity.
Stellar encounters with the Solar System
Stellar encounters with the Solar System are close passages of other stars that gravitationally perturb Oort Cloud comets, occurring within 1 parsec about every 95,000 years.
Stellar evolution
Stellar evolution, also known as the stellar life cycle, is the sequence of changes in a star's structure and composition over its lifetime, determined chiefly by its initial mass.
Stellar Health
Stellar Health is a healthcare technology company founded in 2018 by Michael Meng that pays doctors real-time incentives for value-based care and operates its own Medicare Shared Savings Program accountable care organization.
Stellar magnetic field
A stellar magnetic field is a magnetic field generated within or threading a star's atmosphere, produced by dynamo action or inherited earlier; it drives sunspots, flares, and magnetized winds.
Stellar mass loss
Stellar mass loss is the loss of a star's mass to its surroundings through winds, eruptions, or binary transfer, ranging widely and shaping stellar evolution and remnants.
Stellar mass–halo mass relation
The stellar mass–halo mass relation, also called the stellar-to-halo mass relation or SHMR, is the empirical link between a galaxy's stellar mass and its dark matter halo mass.
Stellar nucleosynthesis
Stellar nucleosynthesis is the formation of new chemical elements by nuclear fusion and neutron capture inside stars, powering stars and building elements up to iron and beyond.
Stellar obliquity
Stellar obliquity, also called the spin–orbit angle, is the angle between a star's rotation axis and the orbital angular momentum of its planets; the Sun's is 7.155 degrees.
Stellar occultation
Stellar occultation is an observational technique in which starlight passing behind a solar system body is analyzed, revealing atmospheric profiles and ring structure at kilometer scales.
Stellar population
A stellar population is a group of stars treated as one unit, classified since Walter Baade's 1944 work into metal-rich Population I, metal-poor Population II, and theorized Population III.
Stellar pulsation
Stellar pulsation, or stellar oscillation, is the periodic expansion and contraction of a star, producing regular brightness changes; its study through asteroseismology reveals stars' interiors.
Stellar rotation
Stellar rotation is the spinning of a star about its axis, measured from spectral line broadening and starspots; magnetized winds slowly spin stars down over their lifetimes.
Stellar stream
A stellar stream is a long, thin band of stars sharing one orbit around a galaxy, formed when gravity tears apart a star cluster or dwarf galaxy.
Stellar structure
Stellar structure is the study and modeling of a star as a self-gravitating ball of gas in equilibrium, transporting energy from its hot core to the surface atmosphere.
Stellar wind
A stellar wind is a continuous outflow of gas from a star's outer layers into interstellar space, carrying away mass and energy; every class of star loses mass this way.
Stellar-wind bubble
A stellar-wind bubble, also called a wind-blown bubble, is a hot, low-density cavity carved in interstellar gas by a star's fast outflow, forming around massive stars and clusters as superbubbles.
Stellarator
A stellarator is a magnetic-confinement fusion device whose twisting field comes entirely from external coils, invented by Lyman Spitzer at Princeton in 1951 and developed alongside the tokamak.
Stellaria
Stellaria (starworts, chickweeds) is a genus of ~110–150 Caryophyllaceae herbs, type S. graminea, Miocene origin in northern Eurasia; best-known species is common chickweed (Stellaria media), an edible weed used in traditional medicine.
Stellaria media
Stellaria media, common chickweed, is a Caryophyllaceae winter annual weed native to temperate Eurasia and North Africa, producing up to 15,000 seeds per plant, edible but invasive, with ALS herbicide resistance confirmed in Ireland.
Stellaris (video game)
Stellaris is a 2016 sci-fi grand strategy and 4X game by Paradox Development Studio; sold 200,000+ units in 24 hours, 1.5 million by 2018, still updated with expansions like Nomads.
Stellaris Venture Partners
Stellaris Venture Partners is a Bengaluru-based early-stage venture capital firm founded in 2017 by three former Helion executives, investing at seed and Series A in India.
Stellastarr
Stellastarr was a New York indie rock band formed in 2000 by Pratt Institute classmates Shawn Christensen, Amanda Tannen, and Arthur Kremer with guitarist Michael Jurin. Three albums: stellastarr (2003, RCA, Metascore 78), Harmonies for the Haunted (2005), Civilized (2009); best known for "Jenny" and "My Coco"; on hiatus since 2009.
Stellate ganglion block
A stellate ganglion block (SGB) is an injection of local anesthetic beside the cervical sympathetic trunk in the neck, used to treat conditions like CRPS and PTSD.
Stellate multiform amelanotic choroidopathy
Stellate multiform amelanotic choroidopathy (SMACH), formerly serous maculopathy due to aspecific choroidopathy, is a rare choroidal disease with stellate amelanotic lesions, subretinal fluid in about 59% of cases, and stable lesion size.
Stellate neuron
Stellate neuron (Cell Ontology CL:0000122, stellate cell): a neuron with star-shaped radiating dendrites. Distinct populations exist in cerebellar molecular layer (GABAergic), neocortical layer 4 (excitatory spiny stellate), and entorhinal cortex layer II (grid-cell related).