Complex sentence: ASTERIA (Arcsecond Space Telescope Enabling Research in Astrophysics) is a miniaturized space telescope meant as a technology demonstrator to advance the CubeSat capabilities for astrophysical measurements.
Split into simpler sentences: ASTERIA (Arcsecond Space Telescope Enabling Research in Astrophysics) is a miniaturized space telescope. The ASTERIA space telescope is meant as a technology demonstrator to advance the CubeSat capabilities for astrophysical measurements.