All articles A–Z

Skynet (satellite)

Skynet is the United Kingdom Ministry of Defence's family of military communications satellites, in service since 1969 and now supplying NATO under an agreement running from 2020.

Skynet, the Skynet Global Defense Network, is a fictional military AI in the Terminator franchise, first appearing in James Cameron's 1984 film The Terminator and becoming a cultural shorthand for dangerous AI.

Skynex

Skynex is a ground-based, networked short-range air defense system by Rheinmetall, first shown at Eurosatory 2016, using 35 mm revolver guns and programmable AHEAD rounds against drones and missiles.

Skype

Skype was a VoIP service launched in 2003 that offered free voice and video calls and messaging, retired by Microsoft in 2025 in favor of Teams.

Skype for Business

Skype for Business, the successor to Microsoft Lync, is a Microsoft enterprise instant messaging, voice, and video conferencing product launched in 2015; its online service retired in 2021 in favor of Microsoft Teams.

Skype Technologies

Skype Technologies, known as Skype Communications S.a.r.l., was the Luxembourg company that developed Skype, the VoIP calling service founded by Niklas Zennström and Janus Friis in 2003 and retired by Microsoft in 2025.

Skyports (company)

Skyports Infrastructure is a London-based company, founded in 2018, that designs and operates vertiports for eVTOL air taxis, including a Dubai network with Joby Aviation.

Skyquake

A skyquake is a loud boom or rumbling from the sky with no visible local cause and no felt earthquake, known regionally as Seneca Guns, mistpouffers, and Barisal guns.

Skyr

Skyr is an Icelandic fresh dairy product made from strained skimmed milk; technically a cheese despite its yogurt-like eating, it has been made in Iceland for over a thousand years.

SkyReels

SkyReels is a family of open-weights, film-oriented video generation models developed by Skywork, first released in February 2025, spanning text-to-video, image-to-video, and talking avatars, and known for infinite-length generation.

Skyrme interaction

The Skyrme interaction is a zero-range, density-dependent effective nucleon–nucleon interaction introduced by T. H. R. Skyrme in 1956, the basis of the Skyrme–Hartree–Fock model used to compute binding energies, radii, and excitations across the nuclear chart.

Sep 29, 2026

Skyrme model

The Skyrme model, introduced by Tony Skyrme in 1961, is a nuclear physics model in which atomic nuclei are represented as topological solitons of a nonlinear pion field theory.

Skyrmion

A skyrmion is a particle-like nanoscale swirl in a material's magnetization, typically 1 to 100 nm wide, first observed in 2009 and a leading candidate for low-energy spintronic memory.

Skyrmion bags in liquid crystals and ferromagnets

Skyrmion bags are stable, particle-like topological solitons in which an arbitrary number of antiskyrmions is confined within a larger skyrmion, demonstrated in chiral liquid crystals and ferromagnets in 2019.

Skyrmion dynamics

Skyrmion dynamics is the study of how magnetic skyrmions, nanoscale whirl-like spin textures, are created, moved, and destroyed under stimuli such as currents, fields, and temperature gradients.

Skyrmion Hall effect

The skyrmion Hall effect is the sideways deflection of current-driven magnetic skyrmions, arising from the Magnus force on their topological charge, first observed experimentally in 2017 at Argonne National Laboratory.

Skyrmion logic

Skyrmion logic is a proposed spintronic computing technology in which Boolean logic operations are performed by moving nanoscale magnetic spin textures called skyrmions through nanowire tracks, encoding bits by their presence or absence.

Skyrmions in SrRuO3/SrIrO3

Skyrmions in SrRuO3/SrIrO3 are nanoscale topologically protected Néel-type magnetic spin textures, among the smallest reported, stabilized by interfacial Dzyaloshinskii-Moriya interaction in bilayers of ferromagnetic SrRuO3 and semimetal SrIrO3.

Oct 21, 2026

Skyros (settlement)

Skyros (settlement), ancient Scyros (Σκῦρος), the ancient town on Skyros island in the northern Sporades, co-located with the modern Chora; inhabited from Early Helladic times, famed for Palamari's Bronze Age fortified town and Athenian conquest under Cimon.

SkySat

SkySat is a commercial Earth-observation constellation of 21 high-resolution imaging satellites built by Skybox Imaging and operated by Planet Labs since 2017, delivering 50 cm imagery and full-motion video.

Skyscanner

Skyscanner is a travel metasearch engine founded in 2003 and headquartered in Edinburgh, Scotland, comparing flight, hotel, and car rental prices before redirecting users to providers to book.

Skyscraper

A skyscraper is a tall, continuously occupiable multi-story building whose steel or concrete frame carries its weight, beginning with Chicago's Home Insurance Building of 1885.

Skyscraper (2018 film)

Skyscraper is a 2018 American action thriller directed by Rawson Marshall Thurber, starring Dwayne Johnson as a security consultant trapped in a burning Hong Kong skyscraper.

Skyscraper Live (2026)

Skyscraper Live (徒手独攀台北101：直播) is a 2026 Netflix live special in which free solo climber Alex Honnold ascended Taipei 101, 508 m, without ropes, streamed January 24, 2026 on a 10-second delay.

SkyServer

SkyServer is the web portal to the Sloan Digital Sky Survey's catalog data, offering public access to images, spectra, and SQL queries for astronomers and science education.

SkyShowtime

SkyShowtime is a 50/50 Comcast-Paramount streaming joint venture for Europe, launched in the Nordics on 20 September 2022 and fully rolled out across 22 markets by 28 February 2023, aggregating Universal, Paramount+, SHOWTIME, Peacock, Nickelodeon, and Sky content in 19 languages, with about 10 million subscribers and roughly €1.3 billion in cumulative losses.