Low Frequency Instrument (LFI)

The Low Frequency Instrument (LFI) is a specialized sensor on a space telescope designed to observe the universe's microwave radiation at low frequencies. It helps scientists study the cosmic microwave background—the faint glow leftover from the universe's early moments—by measuring temperature fluctuations with high precision. These observations provide insights into the universe's origin, composition, and evolution. The LFI uses advanced detectors cooled to very low temperatures to minimize noise, ensuring accurate data collection from deep space.