The balloon named ASTHROS (which is a bit catchier than Astrophysics Stratospheric Telescope for High Spectral Resolution Observations at Submillimeter-wavelengths) will carry a telescope to study stars in the Milky Way and other galaxies.
ASTHROS is planning to launch in December 2023 from Antarctica.
Nasa's Scientific Balloon Program has been operating for 30 years. 

The space agency says balloon missions don't only have lower costs compared to space missions, they also have shorter times between early planning and deployment, which means they can accept the higher risks associated with using new or state-of-the-art technologies that haven't yet flown in space. ðŸ“¸: @NASA