File:Compass Image of Large Magellanic Cloud (2019-25-4491).png

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Compass Image of Large Magellanic Cloud

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Description	English: Compass Image of Large Magellanic Cloud
Date	25 April 2019 (upload date)
Source	Compass Image of Large Magellanic Cloud
Author	Science: , , and A. Riess ()
Other versions	TIF version

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Author	Space Telescope Science Institute Office of Public Outreach
Image title	This is a ground-based telescope's view of the Large Magellanic Cloud, a satellite galaxy of our Milky Way. The inset image, taken by the Hubble Space Telescope, reveals one of many star clusters scattered throughout the dwarf galaxy.The cluster members include a special class of pulsating star called a Cepheid variable, which brightens and dims at a predictable rate that corresponds to its intrinsic brightness. Once astronomers determine that value, they can measure the light from these stars to calculate an accurate distance to the galaxy. When the new Hubble observations are correlated with an independent distance measurement technique to the Large Magellanic Cloud (using straightforward trigonometry), the researchers were able to strengthen the foundation of the so-called "cosmic distance ladder." This "fine-tuning" has significantly improved the accuracy of the rate at which the universe is expanding, called the Hubble constant.
Short title	Large Magellanic Cloud (DSS View) with Star Cluster Overlay (Hubble)
Credit/Provider	NASA, ESA, A. Reiss (STScI/JHU), and Palomar Digitized Sky Survey
Headline	Astronomers Use Hubble to Tighten the Cosmic Distance Ladder
Source	STScI
Usage terms	http://hubblesite.org/copyright/
Date and time of data generation	00:00, 25 April 2019
PNG file comment	This is a ground-based telescope's view of the Large Magellanic Cloud,Â a satellite galaxy of our Milky Way. The inset image, taken by theÂ Hubble Space Telescope, reveals one of many star clusters scatteredÂ throughout the dwarf galaxy. The cluster members include a special class of pulsating star called aÂ Cepheid variable, which brightens and dims at a predictable rate thatÂ corresponds to its intrinsic brightness. Once astronomers determine thatÂ value, they can measure the light from these stars to calculate anÂ accurate distance to the galaxy. When the new Hubble observations areÂ correlated with an independent distance measurement technique to theÂ Large Magellanic Cloud (using straightforward trigonometry), theÂ researchers were able to strengthen the foundation of the so-calledÂ "cosmic distance ladder." This "fine-tuning" has significantly improvedÂ the accuracy of the rate at which the universe is expanding, called theÂ Hubble constant.
Contact information	outreach@stsci.edu http://hubblesite.org 3700 San Martin Drive Baltimore, MD, 21218 USA 410-338-4444
Keywords	Large Magellanic Cloud
Horizontal resolution	28.34 dpc
Vertical resolution	28.34 dpc
File change date and time	09:40, 23 April 2019

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