The array is used in which SETI-related context?

The array is used in which SETI-related context?

• A. SETI
• B. NASA Deep Space Network
• C. Hubble Space Telescope
• D. Gemini Observatory

Answer: (A)

In SETI work, the term “array” refers to a group of radio antennas used together to listen for potential extraterrestrial signals. Combining multiple dishes increases sensitivity, allows beamforming to scan the sky efficiently, and helps detect faint, narrowband signals that might come from distant civilizations. The Allen Telescope Array is a famous example of this approach in SETI. Other facilities listed serve different purposes: the Deep Space Network handles communications with spacecraft, while the Hubble Space Telescope and Gemini Observatory are optical/infrared observatories not used for the radio-search side of SETI.

In SETI work, the term “array” refers to a group of radio antennas used together to listen for potential extraterrestrial signals. Combining multiple dishes increases sensitivity, allows beamforming to scan the sky efficiently, and helps detect faint, narrowband signals that might come from distant civilizations. The Allen Telescope Array is a famous example of this approach in SETI.

Other facilities listed serve different purposes: the Deep Space Network handles communications with spacecraft, while the Hubble Space Telescope and Gemini Observatory are optical/infrared observatories not used for the radio-search side of SETI.