Complex sentence: The star's name, TRAPPIST-1, reflects that it is the first star discovered by the TRAPPIST telescope to have transiting planets; the name is in honour of the Trappist Christian religious order in the Belgian region.
Split into simpler sentences: The star's name, TRAPPIST-1, reflects that it is the first star discovered by the TRAPPIST telescope to have transiting planets. The latter is named in honour of the Trappist Christian religious order in the Belgian region.