These example sentences are selected automatically from various online news sources to reflect current usage of the word 'parsec.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. 2019 A parsec is a unit of distance, not time, so why would Solo use it to explain how quickly his ship could travel? - Kyle Hill, WIRED, 12 Feb. Zeeya Merali, Scientific American, 5 Sep. parsec: A unit of astronomical length based on the distance from Earth at which stellar parallax is one second of arc and equal to 3.258 light-years. 2019 The image shows the supermassive black hole at the centre of the galaxy Messier 87, which lies around 17 parsecs (55 million light years) from Earth. Megaparsec Just like the parsec (an abbreviation for Parallax of one arcsecond) and kiloparsec (equivalent to 1,000 parsecs, or KPC for short), the megaparsec (or MPC) is a measurement unit that is used in astronomy to measure the great, vast distance between galaxies in intergalactic space. 2020 In this new version, Greedo pulls the trigger first in a wild shot, missing Han by half a parsec. Nola Taylor Redd, Scientific American, 10 Feb. 2020 The problem comes in the final parsec, where gravity is not strong enough to overcome the centrifugal force of each black hole’s orbit to pull the pair closer together. 2021 Recently astronomers settled on a value of 25 parsecs (82 light-years) above the plane, but our results strongly disagree with this estimate. Joshua Rapp Learn, Discover Magazine, What, then, can astronomers do to determine whether the final parsec problem is really a problem? - Alison Klesman, Discover Magazine, 12 July 2019 This is a huge region for comparison, ten kiloparsec is about the radius of a typical spiral galaxy like our own Milky Way, and a parsec itself is already pretty big, at more than three light-years. a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc equivalent to 3.262 light. Recent Examples on the Web The clustered filaments are especially compelling as they are regularly spaced from each other, with roughly one parsec between them.
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