Complex sentence: ASTERIA (Arcsecond Space Telescope Enabling Research in Astrophysics) is a miniaturized space telescope technology demonstration mission that employs a nanosatellite of the 6U CubeSat format.
Split into simpler sentences: ASTERIA (Arcsecond Space Telescope Enabling Research in Astrophysics) is a miniaturized space telescope. It employs a nanosatellite of the 6U CubeSat format.