NASA has launched a wonderful picture taken by the NASA/ESA Hubble House Telescope of an historical star cluster known as NGC 1466.
NGC 1466 is a globular cluster — a gathering of stars all held collectively by gravity.
It was found on November 26, 1834 by English astronomer John Herschel.
Also referred to as ESO 54-16 and LW 1, the cluster lies roughly 160,000 light-years away within the small southern constellation Hydrus.
It’s positioned within the outskirts of the Giant Magellanic Cloud, one in every of our closest galactic neighbors.
NGC 1466 has a mass of about 140,000 photo voltaic plenty and an age of round 13.1 billion years, making it nearly as outdated because the Universe itself.
Nestled inside this historical time capsule are 49 identified RR Lyrae variable stars, that are indispensable instruments for measuring distances within the Universe.
These variable stars have well-defined luminosities, which means that astronomers know the full quantity of power they emit.
By evaluating this identified luminosity to how shiny the celebs seem within the sky, their distance could be simply calculated.
Astronomical objects comparable to this are generally known as normal candles, and are basic to the so-called cosmic distance ladder.