A star system from the early universe
Gravitational lenses, like magnifying glasses, tend to warp and twist images and have areas of higher and lower magnification. If you have a magnifying glass at home, the best magnification is likelyGravitational lenses, like magnifying glasses, tend to warp and twist images and have areas of higher and lower magnification
Welch realized that this bright point was an object very closely aligned with the critical curve — so close and so small that even Hubble’s sharp eye resolved its doubled, reflected image across the line as a single smear. That proximity to the critical curve also meant that whatever it was, it had already been magnified somewhere between 1,000 and 40,000 times before reaching Hubble.
“With distant objects, we are seeing into the universe’s past and into a time when the universe looked very different than it does today,” Welch said. “We know that galaxies look different at this early time, and we know that there have been relatively few generations of stars that came before.”
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