How to Use variable star in a Sentence

variable star

noun

• So a variable star is one that changes its brightness over time in a regular cycle.
  — Lucy Evans, Scientific American, 22 June 2023
• On top of these random events, Betelgeuse is also known to be a semi-regular variable star.
  — The Economist, 11 Jan. 2020
• Betelgeuse has always been a variable star (though far less variable than at present), and there are a couple of potential causes.
  — John Timmer, Ars Technica, 14 Feb. 2020
• The variable star usually cycles from dim to bright over some 420 days, so astronomers say there’s still more to the mystery.
  — Eric Betz, Discover Magazine, 14 Dec. 2020
• The image from Hubble shows a nebula (a gas cloud) that happened during one of the larger outbursts from the variable star.
  — Elizabeth Howell, Forbes, 26 Apr. 2021
• The telescope gathered a trove of unprecedented data on the pulsations of variable stars throughout the galaxy.
  — Quanta Magazine, 10 Mar. 2015
• Haro discovered flare stars, variable stars which experience unpredictable surges in brightness.
  — Brett Molina, USA TODAY, 21 Mar. 2018
• Using these variable stars, scientists can measure the distances to galaxies up to about 100 million light-years from us.
  — Quanta Magazine, 19 Jan. 2024
• This variable star is also located 250 light-years from Earth, but is sadly lost from view in the glare of the sun during the summer months.
  — Anthony Wood, Space.com, 29 June 2026
• For the local universe, these mile markers are Cepheid variable stars, which periodically pulse and share the same intrinsic brightness.
  — National Geographic, 25 Apr. 2018
• Observations based on nearby cosmic objects like Cepheid variable stars and supernovae suggest a faster expansion rate.
  — Georgina Jedikovska, Interesting Engineering, 5 Mar. 2026
• Mroz counters, however, that none of those cases are actual microlensing events and instead the mere fluctuations of ordinary variable stars.
  — Jonathan O'Callaghan, Scientific American, 4 June 2026
• According to some models, the luminous blue variable star might have skipped the supernova stage and formed a slow-spinning black hole instead, Allan told Gizmodo.
  — Jennifer Leman, Popular Mechanics, 6 July 2020
• Bright idea Skowron and her colleagues mapped the Milky Way in three dimensions using 2,431 classical Cepheid variable stars.
  — Nadia Drake, National Geographic, 1 Aug. 2019
• Stars that change in brightness, known as variable stars, get brighter and dimmer; supernovas burst into view and then gradually fade away; and thousands of objects too faint to see with the unaided eye, like asteroids, move steadily across the sky.
  — Dan Falk, Smithsonian Magazine, 20 June 2024
• Henrietta Swan Leavitt developed a key method for measuring astronomical distances that is based on the pulsations of Cepheid variable stars.
  — WIRED, 12 Nov. 2023
• The scientists from the Chinese Academy of Sciences used this method to create a three-dimensional map of over a thousand Cepheid variable stars in our galaxy, from the innermost core to the outer edges.
  — Avery Thompson, Popular Mechanics, 5 Feb. 2019
• This region, about 8,000 light-years from Earth, is located adjacent to the famous explosive variable star Eta Carinae, which lies just outside the field of view toward the upper right.
  — Alan Taylor, The Atlantic, 8 Dec. 2024
• In another imaging campaign, API, assisted by AMIGO, was able to produce detailed images of a black hole jet, the volcanic surface of Jupiter's moon Io, and stellar winds emanating from a distant variable star.
  — Tereza Pultarova, Space.com, 5 Nov. 2025