This image from the Hubble Space Telescope shows the spiral arms of the galaxy NGC 7038 winding languidly across space. Located about 220 million light-years from Earth, NGC 7038 lies in the southern constellation Indus. With an incredibly rich and intricately detailed view of a spiral galaxy, t
Hubble Space Telescope image of NGC 7038, a spiral galaxy located approximately 220 million light-years from Earth. Credit: ESA/Hubble & NASA, D. Jones, Acknowledgment: G. Anand, L. Shatzshows the spiral arms of the galaxy NGC 7038 winding languidly across space. Located about 220 million light-years from Earth, NGC 7038 lies in the southern constellation Indus., this image also exposes a huge number of distant stars and galaxies around it.
Using an interconnected chain of measurement techniques called the Cosmic Distance Ladder, researchers are able to determine distances to astronomical objects. Each rung in the ladder is calibrated by earlier steps, based on measurements of objects closer to us. Therefore, theof distances at the largest scales is dependent on how accurately distances to nearby objects can be determined.
One of Hubble’s original science goals was to accurately establish distances to night-sky objects, and throughout the course of its three decades of operation, Hubble’s increasingly precise distance measurements have . The Hubble constant, which captures the rate of expansion of the Universe, is derived from distance measurements.with the value of the Hubble Constant derived from observations of the
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