NASA is preparing to launch its latest infrared space telescope, SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer), on February 28. The $488 million mission will lift off from Vandenberg Space Force Base in California aboard a SpaceX Falcon 9 rocket. SPHEREx is designed to scan the entire sky in infrared light, capturing data from over 450 million galaxies and 100 million stars in the Milky Way. Its observations will target regions of the universe that are typically too distant or faint for conventional telescopes, offering an unprecedented look at cosmic history.
One of SPHEREx’s key scientific goals is to investigate cosmic inflation, the rapid expansion of the universe that took place within the first second after the Big Bang. By mapping large-scale structures in space, the telescope will help astronomers understand how galaxies formed and evolved over billions of years. Additionally, SPHEREx will search for icy molecules in interstellar space, providing crucial data on the origins of water and organic compounds essential for life. Scientists believe these insights could deepen our understanding of planetary system formation and the potential for habitability beyond Earth.
From a technical perspective, SPHEREx is an advanced yet compact observatory. Weighing approximately 500 kilograms, it operates on 270 to 300 watts of power and is equipped with a cutting-edge spectrophotometer. This instrument can detect 102 different wavelengths of infrared light, allowing it to identify unique chemical signatures across vast cosmic distances. According to NASA’s Jet Propulsion Laboratory (JPL), this capability will enable SPHEREx to create a detailed spectral map of the sky, helping researchers decipher the composition of celestial objects.
Beyond its planned objectives, SPHEREx may also yield unexpected discoveries. James Fanson, the mission’s Project Manager at JPL, told NPR that the telescope’s extensive dataset could lead to breakthroughs in areas not yet anticipated. As scientists analyze SPHEREx’s observations, they hope to uncover new insights into the structure and evolution of the universe, potentially reshaping our understanding of cosmic history.