James Webb and Hubble Telescopes Confirm Universe's Expansion Rate

Webb & Hubble confirm Universe’s expansion rate 🔗

Webb measurements shed new light on a decade-long mystery.The rate at which the Universe is expanding, known as the Hubble constant, is one of the fundamental parameters for understanding the evolution and ultimate fate of the cosmos. However, a persistent difference, called the Hubble Tension, is seen between the value of the constant measured with a wide range of independent distance indicators and its value predicted from the afterglow of the Big Bang. The NASA/ESA/CSA James Webb Space Telescope has confirmed that the Hubble Space Telescope’s keen eye was right all along, erasing any lingering doubt about Hubble’s measurements.

The text discusses the confirmation of the Universe's expansion rate by the James Webb Space Telescope and the Hubble Space Telescope, resolving a decade-long mystery known as the Hubble Tension. The discrepancy between different measurements of the Hubble constant has led to speculation about new physics or measurement errors. The collaborative efforts of Webb and Hubble have provided definitive measurements, supporting the idea that something other than measurement errors is influencing the expansion rate. The findings were published in The Astrophysical Journal Letters on February 6, 2024. Additionally, the text provides information about the Webb telescope and its launch, emphasizing the international collaboration between NASA, ESA, and the Canadian Space Agency.