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NASA's Astrophysics Stratospheric Telescope for High Spectral Resolution Observations at Submillimeter-wavelengths (ASTHROS), seen in this illustration, is a high-altitude balloon mission for studying astrophysical phenomena. Scheduled to launch no earlier than December 2023 from the agency's Long Duration Balloon Camp near McMurdo Station in Antarctica, ASTHROS will aim to fly for 21 to 28 days at an altitude of about 130,000 feet (24.6 miles or 40 kilometers). At that altitude, ASTHROS can observe wavelengths of light blocked by Earth's atmosphere. When fully inflated, the 40 million-cubic-…
